diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 3835 |
1 files changed, 3835 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c new file mode 100644 index 000000000..7c21e21bc --- /dev/null +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c @@ -0,0 +1,3835 @@ +/* + * Copyright 2018 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +#include <linux/string_helpers.h> +#include <linux/uaccess.h> + +#include "dc.h" +#include "amdgpu.h" +#include "amdgpu_dm.h" +#include "amdgpu_dm_debugfs.h" +#include "dm_helpers.h" +#include "dmub/dmub_srv.h" +#include "resource.h" +#include "dsc.h" +#include "link_hwss.h" +#include "dc/dc_dmub_srv.h" +#include "link/protocols/link_dp_capability.h" + +#ifdef CONFIG_DRM_AMD_SECURE_DISPLAY +#include "amdgpu_dm_psr.h" +#endif + +struct dmub_debugfs_trace_header { + uint32_t entry_count; + uint32_t reserved[3]; +}; + +struct dmub_debugfs_trace_entry { + uint32_t trace_code; + uint32_t tick_count; + uint32_t param0; + uint32_t param1; +}; + +static const char *const mst_progress_status[] = { + "probe", + "remote_edid", + "allocate_new_payload", + "clear_allocated_payload", +}; + +/* parse_write_buffer_into_params - Helper function to parse debugfs write buffer into an array + * + * Function takes in attributes passed to debugfs write entry + * and writes into param array. + * The user passes max_param_num to identify maximum number of + * parameters that could be parsed. + * + */ +static int parse_write_buffer_into_params(char *wr_buf, uint32_t wr_buf_size, + long *param, const char __user *buf, + int max_param_num, + uint8_t *param_nums) +{ + char *wr_buf_ptr = NULL; + uint32_t wr_buf_count = 0; + int r; + char *sub_str = NULL; + const char delimiter[3] = {' ', '\n', '\0'}; + uint8_t param_index = 0; + + *param_nums = 0; + + wr_buf_ptr = wr_buf; + + /* r is bytes not be copied */ + if (copy_from_user(wr_buf_ptr, buf, wr_buf_size)) { + DRM_DEBUG_DRIVER("user data could not be read successfully\n"); + return -EFAULT; + } + + /* check number of parameters. isspace could not differ space and \n */ + while ((*wr_buf_ptr != 0xa) && (wr_buf_count < wr_buf_size)) { + /* skip space*/ + while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) { + wr_buf_ptr++; + wr_buf_count++; + } + + if (wr_buf_count == wr_buf_size) + break; + + /* skip non-space*/ + while ((!isspace(*wr_buf_ptr)) && (wr_buf_count < wr_buf_size)) { + wr_buf_ptr++; + wr_buf_count++; + } + + (*param_nums)++; + + if (wr_buf_count == wr_buf_size) + break; + } + + if (*param_nums > max_param_num) + *param_nums = max_param_num; + + wr_buf_ptr = wr_buf; /* reset buf pointer */ + wr_buf_count = 0; /* number of char already checked */ + + while (isspace(*wr_buf_ptr) && (wr_buf_count < wr_buf_size)) { + wr_buf_ptr++; + wr_buf_count++; + } + + while (param_index < *param_nums) { + /* after strsep, wr_buf_ptr will be moved to after space */ + sub_str = strsep(&wr_buf_ptr, delimiter); + + r = kstrtol(sub_str, 16, &(param[param_index])); + + if (r) + DRM_DEBUG_DRIVER("string to int convert error code: %d\n", r); + + param_index++; + } + + return 0; +} + +/* function description + * get/ set DP configuration: lane_count, link_rate, spread_spectrum + * + * valid lane count value: 1, 2, 4 + * valid link rate value: + * 06h = 1.62Gbps per lane + * 0Ah = 2.7Gbps per lane + * 0Ch = 3.24Gbps per lane + * 14h = 5.4Gbps per lane + * 1Eh = 8.1Gbps per lane + * + * debugfs is located at /sys/kernel/debug/dri/0/DP-x/link_settings + * + * --- to get dp configuration + * + * cat /sys/kernel/debug/dri/0/DP-x/link_settings + * + * It will list current, verified, reported, preferred dp configuration. + * current -- for current video mode + * verified --- maximum configuration which pass link training + * reported --- DP rx report caps (DPCD register offset 0, 1 2) + * preferred --- user force settings + * + * --- set (or force) dp configuration + * + * echo <lane_count> <link_rate> > link_settings + * + * for example, to force to 2 lane, 2.7GHz, + * echo 4 0xa > /sys/kernel/debug/dri/0/DP-x/link_settings + * + * spread_spectrum could not be changed dynamically. + * + * in case invalid lane count, link rate are force, no hw programming will be + * done. please check link settings after force operation to see if HW get + * programming. + * + * cat /sys/kernel/debug/dri/0/DP-x/link_settings + * + * check current and preferred settings. + * + */ +static ssize_t dp_link_settings_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + const uint32_t rd_buf_size = 100; + uint32_t result = 0; + uint8_t str_len = 0; + int r; + + if (*pos & 3 || size & 3) + return -EINVAL; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + if (!rd_buf) + return 0; + + rd_buf_ptr = rd_buf; + + str_len = strlen("Current: %d 0x%x %d "); + snprintf(rd_buf_ptr, str_len, "Current: %d 0x%x %d ", + link->cur_link_settings.lane_count, + link->cur_link_settings.link_rate, + link->cur_link_settings.link_spread); + rd_buf_ptr += str_len; + + str_len = strlen("Verified: %d 0x%x %d "); + snprintf(rd_buf_ptr, str_len, "Verified: %d 0x%x %d ", + link->verified_link_cap.lane_count, + link->verified_link_cap.link_rate, + link->verified_link_cap.link_spread); + rd_buf_ptr += str_len; + + str_len = strlen("Reported: %d 0x%x %d "); + snprintf(rd_buf_ptr, str_len, "Reported: %d 0x%x %d ", + link->reported_link_cap.lane_count, + link->reported_link_cap.link_rate, + link->reported_link_cap.link_spread); + rd_buf_ptr += str_len; + + str_len = strlen("Preferred: %d 0x%x %d "); + snprintf(rd_buf_ptr, str_len, "Preferred: %d 0x%x %d\n", + link->preferred_link_setting.lane_count, + link->preferred_link_setting.link_rate, + link->preferred_link_setting.link_spread); + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +static ssize_t dp_link_settings_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + struct amdgpu_device *adev = drm_to_adev(connector->base.dev); + struct dc *dc = (struct dc *)link->dc; + struct dc_link_settings prefer_link_settings; + char *wr_buf = NULL; + const uint32_t wr_buf_size = 40; + /* 0: lane_count; 1: link_rate */ + int max_param_num = 2; + uint8_t param_nums = 0; + long param[2]; + bool valid_input = true; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + if (!wr_buf) + return -ENOSPC; + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("user data not be read\n"); + return -EINVAL; + } + + switch (param[0]) { + case LANE_COUNT_ONE: + case LANE_COUNT_TWO: + case LANE_COUNT_FOUR: + break; + default: + valid_input = false; + break; + } + + switch (param[1]) { + case LINK_RATE_LOW: + case LINK_RATE_HIGH: + case LINK_RATE_RBR2: + case LINK_RATE_HIGH2: + case LINK_RATE_HIGH3: + case LINK_RATE_UHBR10: + case LINK_RATE_UHBR13_5: + case LINK_RATE_UHBR20: + break; + default: + valid_input = false; + break; + } + + if (!valid_input) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("Invalid Input value No HW will be programmed\n"); + mutex_lock(&adev->dm.dc_lock); + dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false); + mutex_unlock(&adev->dm.dc_lock); + return size; + } + + /* save user force lane_count, link_rate to preferred settings + * spread spectrum will not be changed + */ + prefer_link_settings.link_spread = link->cur_link_settings.link_spread; + prefer_link_settings.use_link_rate_set = false; + prefer_link_settings.lane_count = param[0]; + prefer_link_settings.link_rate = param[1]; + + mutex_lock(&adev->dm.dc_lock); + dc_link_set_preferred_training_settings(dc, &prefer_link_settings, NULL, link, false); + mutex_unlock(&adev->dm.dc_lock); + + kfree(wr_buf); + return size; +} + +static bool dp_mst_is_end_device(struct amdgpu_dm_connector *aconnector) +{ + bool is_end_device = false; + struct drm_dp_mst_topology_mgr *mgr = NULL; + struct drm_dp_mst_port *port = NULL; + + if (aconnector->mst_root && aconnector->mst_root->mst_mgr.mst_state) { + mgr = &aconnector->mst_root->mst_mgr; + port = aconnector->mst_output_port; + + drm_modeset_lock(&mgr->base.lock, NULL); + if (port->pdt == DP_PEER_DEVICE_SST_SINK || + port->pdt == DP_PEER_DEVICE_DP_LEGACY_CONV) + is_end_device = true; + drm_modeset_unlock(&mgr->base.lock); + } + + return is_end_device; +} + +/* Change MST link setting + * + * valid lane count value: 1, 2, 4 + * valid link rate value: + * 06h = 1.62Gbps per lane + * 0Ah = 2.7Gbps per lane + * 0Ch = 3.24Gbps per lane + * 14h = 5.4Gbps per lane + * 1Eh = 8.1Gbps per lane + * 3E8h = 10.0Gbps per lane + * 546h = 13.5Gbps per lane + * 7D0h = 20.0Gbps per lane + * + * debugfs is located at /sys/kernel/debug/dri/0/DP-x/mst_link_settings + * + * for example, to force to 2 lane, 10.0GHz, + * echo 2 0x3e8 > /sys/kernel/debug/dri/0/DP-x/mst_link_settings + * + * Valid input will trigger hotplug event to get new link setting applied + * Invalid input will trigger training setting reset + * + * The usage can be referred to link_settings entry + * + */ +static ssize_t dp_mst_link_setting(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct dc_link *link = aconnector->dc_link; + struct amdgpu_device *adev = drm_to_adev(aconnector->base.dev); + struct dc *dc = (struct dc *)link->dc; + struct dc_link_settings prefer_link_settings; + char *wr_buf = NULL; + const uint32_t wr_buf_size = 40; + /* 0: lane_count; 1: link_rate */ + int max_param_num = 2; + uint8_t param_nums = 0; + long param[2]; + bool valid_input = true; + + if (!dp_mst_is_end_device(aconnector)) + return -EINVAL; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + if (!wr_buf) + return -ENOSPC; + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("user data not be read\n"); + return -EINVAL; + } + + switch (param[0]) { + case LANE_COUNT_ONE: + case LANE_COUNT_TWO: + case LANE_COUNT_FOUR: + break; + default: + valid_input = false; + break; + } + + switch (param[1]) { + case LINK_RATE_LOW: + case LINK_RATE_HIGH: + case LINK_RATE_RBR2: + case LINK_RATE_HIGH2: + case LINK_RATE_HIGH3: + case LINK_RATE_UHBR10: + case LINK_RATE_UHBR13_5: + case LINK_RATE_UHBR20: + break; + default: + valid_input = false; + break; + } + + if (!valid_input) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("Invalid Input value No HW will be programmed\n"); + mutex_lock(&adev->dm.dc_lock); + dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false); + mutex_unlock(&adev->dm.dc_lock); + return -EINVAL; + } + + /* save user force lane_count, link_rate to preferred settings + * spread spectrum will not be changed + */ + prefer_link_settings.link_spread = link->cur_link_settings.link_spread; + prefer_link_settings.use_link_rate_set = false; + prefer_link_settings.lane_count = param[0]; + prefer_link_settings.link_rate = param[1]; + + /* skip immediate retrain, and train to new link setting after hotplug event triggered */ + mutex_lock(&adev->dm.dc_lock); + dc_link_set_preferred_training_settings(dc, &prefer_link_settings, NULL, link, true); + mutex_unlock(&adev->dm.dc_lock); + + mutex_lock(&aconnector->base.dev->mode_config.mutex); + aconnector->base.force = DRM_FORCE_OFF; + mutex_unlock(&aconnector->base.dev->mode_config.mutex); + drm_kms_helper_hotplug_event(aconnector->base.dev); + + msleep(100); + + mutex_lock(&aconnector->base.dev->mode_config.mutex); + aconnector->base.force = DRM_FORCE_UNSPECIFIED; + mutex_unlock(&aconnector->base.dev->mode_config.mutex); + drm_kms_helper_hotplug_event(aconnector->base.dev); + + kfree(wr_buf); + return size; +} + +/* function: get current DP PHY settings: voltage swing, pre-emphasis, + * post-cursor2 (defined by VESA DP specification) + * + * valid values + * voltage swing: 0,1,2,3 + * pre-emphasis : 0,1,2,3 + * post cursor2 : 0,1,2,3 + * + * + * how to use this debugfs + * + * debugfs is located at /sys/kernel/debug/dri/0/DP-x + * + * there will be directories, like DP-1, DP-2,DP-3, etc. for DP display + * + * To figure out which DP-x is the display for DP to be check, + * cd DP-x + * ls -ll + * There should be debugfs file, like link_settings, phy_settings. + * cat link_settings + * from lane_count, link_rate to figure which DP-x is for display to be worked + * on + * + * To get current DP PHY settings, + * cat phy_settings + * + * To change DP PHY settings, + * echo <voltage_swing> <pre-emphasis> <post_cursor2> > phy_settings + * for examle, to change voltage swing to 2, pre-emphasis to 3, post_cursor2 to + * 0, + * echo 2 3 0 > phy_settings + * + * To check if change be applied, get current phy settings by + * cat phy_settings + * + * In case invalid values are set by user, like + * echo 1 4 0 > phy_settings + * + * HW will NOT be programmed by these settings. + * cat phy_settings will show the previous valid settings. + */ +static ssize_t dp_phy_settings_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + char *rd_buf = NULL; + const uint32_t rd_buf_size = 20; + uint32_t result = 0; + int r; + + if (*pos & 3 || size & 3) + return -EINVAL; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + if (!rd_buf) + return -EINVAL; + + snprintf(rd_buf, rd_buf_size, " %d %d %d\n", + link->cur_lane_setting[0].VOLTAGE_SWING, + link->cur_lane_setting[0].PRE_EMPHASIS, + link->cur_lane_setting[0].POST_CURSOR2); + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user((*(rd_buf + result)), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +static int dp_lttpr_status_show(struct seq_file *m, void *unused) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = + to_amdgpu_dm_connector(connector); + struct dc_lttpr_caps caps = aconnector->dc_link->dpcd_caps.lttpr_caps; + + if (connector->status != connector_status_connected) + return -ENODEV; + + seq_printf(m, "phy repeater count: %u (raw: 0x%x)\n", + dp_parse_lttpr_repeater_count(caps.phy_repeater_cnt), + caps.phy_repeater_cnt); + + seq_puts(m, "phy repeater mode: "); + + switch (caps.mode) { + case DP_PHY_REPEATER_MODE_TRANSPARENT: + seq_puts(m, "transparent"); + break; + case DP_PHY_REPEATER_MODE_NON_TRANSPARENT: + seq_puts(m, "non-transparent"); + break; + case 0x00: + seq_puts(m, "non lttpr"); + break; + default: + seq_printf(m, "read error (raw: 0x%x)", caps.mode); + break; + } + + seq_puts(m, "\n"); + return 0; +} + +static ssize_t dp_phy_settings_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + struct dc *dc = (struct dc *)link->dc; + char *wr_buf = NULL; + uint32_t wr_buf_size = 40; + long param[3]; + bool use_prefer_link_setting; + struct link_training_settings link_lane_settings; + int max_param_num = 3; + uint8_t param_nums = 0; + int r = 0; + + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + if (!wr_buf) + return -ENOSPC; + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("user data not be read\n"); + return -EINVAL; + } + + if ((param[0] > VOLTAGE_SWING_MAX_LEVEL) || + (param[1] > PRE_EMPHASIS_MAX_LEVEL) || + (param[2] > POST_CURSOR2_MAX_LEVEL)) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("Invalid Input No HW will be programmed\n"); + return size; + } + + /* get link settings: lane count, link rate */ + use_prefer_link_setting = + ((link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) && + (link->test_pattern_enabled)); + + memset(&link_lane_settings, 0, sizeof(link_lane_settings)); + + if (use_prefer_link_setting) { + link_lane_settings.link_settings.lane_count = + link->preferred_link_setting.lane_count; + link_lane_settings.link_settings.link_rate = + link->preferred_link_setting.link_rate; + link_lane_settings.link_settings.link_spread = + link->preferred_link_setting.link_spread; + } else { + link_lane_settings.link_settings.lane_count = + link->cur_link_settings.lane_count; + link_lane_settings.link_settings.link_rate = + link->cur_link_settings.link_rate; + link_lane_settings.link_settings.link_spread = + link->cur_link_settings.link_spread; + } + + /* apply phy settings from user */ + for (r = 0; r < link_lane_settings.link_settings.lane_count; r++) { + link_lane_settings.hw_lane_settings[r].VOLTAGE_SWING = + (enum dc_voltage_swing) (param[0]); + link_lane_settings.hw_lane_settings[r].PRE_EMPHASIS = + (enum dc_pre_emphasis) (param[1]); + link_lane_settings.hw_lane_settings[r].POST_CURSOR2 = + (enum dc_post_cursor2) (param[2]); + } + + /* program ASIC registers and DPCD registers */ + dc_link_set_drive_settings(dc, &link_lane_settings, link); + + kfree(wr_buf); + return size; +} + +/* function description + * + * set PHY layer or Link layer test pattern + * PHY test pattern is used for PHY SI check. + * Link layer test will not affect PHY SI. + * + * Reset Test Pattern: + * 0 = DP_TEST_PATTERN_VIDEO_MODE + * + * PHY test pattern supported: + * 1 = DP_TEST_PATTERN_D102 + * 2 = DP_TEST_PATTERN_SYMBOL_ERROR + * 3 = DP_TEST_PATTERN_PRBS7 + * 4 = DP_TEST_PATTERN_80BIT_CUSTOM + * 5 = DP_TEST_PATTERN_CP2520_1 + * 6 = DP_TEST_PATTERN_CP2520_2 = DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE + * 7 = DP_TEST_PATTERN_CP2520_3 + * + * DP PHY Link Training Patterns + * 8 = DP_TEST_PATTERN_TRAINING_PATTERN1 + * 9 = DP_TEST_PATTERN_TRAINING_PATTERN2 + * a = DP_TEST_PATTERN_TRAINING_PATTERN3 + * b = DP_TEST_PATTERN_TRAINING_PATTERN4 + * + * DP Link Layer Test pattern + * c = DP_TEST_PATTERN_COLOR_SQUARES + * d = DP_TEST_PATTERN_COLOR_SQUARES_CEA + * e = DP_TEST_PATTERN_VERTICAL_BARS + * f = DP_TEST_PATTERN_HORIZONTAL_BARS + * 10= DP_TEST_PATTERN_COLOR_RAMP + * + * debugfs phy_test_pattern is located at /syskernel/debug/dri/0/DP-x + * + * --- set test pattern + * echo <test pattern #> > test_pattern + * + * If test pattern # is not supported, NO HW programming will be done. + * for DP_TEST_PATTERN_80BIT_CUSTOM, it needs extra 10 bytes of data + * for the user pattern. input 10 bytes data are separated by space + * + * echo 0x4 0x11 0x22 0x33 0x44 0x55 0x66 0x77 0x88 0x99 0xaa > test_pattern + * + * --- reset test pattern + * echo 0 > test_pattern + * + * --- HPD detection is disabled when set PHY test pattern + * + * when PHY test pattern (pattern # within [1,7]) is set, HPD pin of HW ASIC + * is disable. User could unplug DP display from DP connected and plug scope to + * check test pattern PHY SI. + * If there is need unplug scope and plug DP display back, do steps below: + * echo 0 > phy_test_pattern + * unplug scope + * plug DP display. + * + * "echo 0 > phy_test_pattern" will re-enable HPD pin again so that video sw + * driver could detect "unplug scope" and "plug DP display" + */ +static ssize_t dp_phy_test_pattern_debugfs_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + char *wr_buf = NULL; + uint32_t wr_buf_size = 100; + long param[11] = {0x0}; + int max_param_num = 11; + enum dp_test_pattern test_pattern = DP_TEST_PATTERN_UNSUPPORTED; + bool disable_hpd = false; + bool valid_test_pattern = false; + uint8_t param_nums = 0; + /* init with default 80bit custom pattern */ + uint8_t custom_pattern[10] = { + 0x1f, 0x7c, 0xf0, 0xc1, 0x07, + 0x1f, 0x7c, 0xf0, 0xc1, 0x07 + }; + struct dc_link_settings prefer_link_settings = {LANE_COUNT_UNKNOWN, + LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED}; + struct dc_link_settings cur_link_settings = {LANE_COUNT_UNKNOWN, + LINK_RATE_UNKNOWN, LINK_SPREAD_DISABLED}; + struct link_training_settings link_training_settings; + int i; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + if (!wr_buf) + return -ENOSPC; + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("user data not be read\n"); + return -EINVAL; + } + + + test_pattern = param[0]; + + switch (test_pattern) { + case DP_TEST_PATTERN_VIDEO_MODE: + case DP_TEST_PATTERN_COLOR_SQUARES: + case DP_TEST_PATTERN_COLOR_SQUARES_CEA: + case DP_TEST_PATTERN_VERTICAL_BARS: + case DP_TEST_PATTERN_HORIZONTAL_BARS: + case DP_TEST_PATTERN_COLOR_RAMP: + valid_test_pattern = true; + break; + + case DP_TEST_PATTERN_D102: + case DP_TEST_PATTERN_SYMBOL_ERROR: + case DP_TEST_PATTERN_PRBS7: + case DP_TEST_PATTERN_80BIT_CUSTOM: + case DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE: + case DP_TEST_PATTERN_TRAINING_PATTERN4: + disable_hpd = true; + valid_test_pattern = true; + break; + + default: + valid_test_pattern = false; + test_pattern = DP_TEST_PATTERN_UNSUPPORTED; + break; + } + + if (!valid_test_pattern) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("Invalid Test Pattern Parameters\n"); + return size; + } + + if (test_pattern == DP_TEST_PATTERN_80BIT_CUSTOM) { + for (i = 0; i < 10; i++) { + if ((uint8_t) param[i + 1] != 0x0) + break; + } + + if (i < 10) { + /* not use default value */ + for (i = 0; i < 10; i++) + custom_pattern[i] = (uint8_t) param[i + 1]; + } + } + + /* Usage: set DP physical test pattern using debugfs with normal DP + * panel. Then plug out DP panel and connect a scope to measure + * For normal video mode and test pattern generated from CRCT, + * they are visibile to user. So do not disable HPD. + * Video Mode is also set to clear the test pattern, so enable HPD + * because it might have been disabled after a test pattern was set. + * AUX depends on HPD * sequence dependent, do not move! + */ + if (!disable_hpd) + dc_link_enable_hpd(link); + + prefer_link_settings.lane_count = link->verified_link_cap.lane_count; + prefer_link_settings.link_rate = link->verified_link_cap.link_rate; + prefer_link_settings.link_spread = link->verified_link_cap.link_spread; + + cur_link_settings.lane_count = link->cur_link_settings.lane_count; + cur_link_settings.link_rate = link->cur_link_settings.link_rate; + cur_link_settings.link_spread = link->cur_link_settings.link_spread; + + link_training_settings.link_settings = cur_link_settings; + + + if (test_pattern != DP_TEST_PATTERN_VIDEO_MODE) { + if (prefer_link_settings.lane_count != LANE_COUNT_UNKNOWN && + prefer_link_settings.link_rate != LINK_RATE_UNKNOWN && + (prefer_link_settings.lane_count != cur_link_settings.lane_count || + prefer_link_settings.link_rate != cur_link_settings.link_rate)) + link_training_settings.link_settings = prefer_link_settings; + } + + for (i = 0; i < (unsigned int)(link_training_settings.link_settings.lane_count); i++) + link_training_settings.hw_lane_settings[i] = link->cur_lane_setting[i]; + + dc_link_dp_set_test_pattern( + link, + test_pattern, + DP_TEST_PATTERN_COLOR_SPACE_RGB, + &link_training_settings, + custom_pattern, + 10); + + /* Usage: Set DP physical test pattern using AMDDP with normal DP panel + * Then plug out DP panel and connect a scope to measure DP PHY signal. + * Need disable interrupt to avoid SW driver disable DP output. This is + * done after the test pattern is set. + */ + if (valid_test_pattern && disable_hpd) + dc_link_disable_hpd(link); + + kfree(wr_buf); + + return size; +} + +/* + * Returns the DMCUB tracebuffer contents. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_tracebuffer + */ +static int dmub_tracebuffer_show(struct seq_file *m, void *data) +{ + struct amdgpu_device *adev = m->private; + struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info; + struct dmub_debugfs_trace_entry *entries; + uint8_t *tbuf_base; + uint32_t tbuf_size, max_entries, num_entries, i; + + if (!fb_info) + return 0; + + tbuf_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].cpu_addr; + if (!tbuf_base) + return 0; + + tbuf_size = fb_info->fb[DMUB_WINDOW_5_TRACEBUFF].size; + max_entries = (tbuf_size - sizeof(struct dmub_debugfs_trace_header)) / + sizeof(struct dmub_debugfs_trace_entry); + + num_entries = + ((struct dmub_debugfs_trace_header *)tbuf_base)->entry_count; + + num_entries = min(num_entries, max_entries); + + entries = (struct dmub_debugfs_trace_entry + *)(tbuf_base + + sizeof(struct dmub_debugfs_trace_header)); + + for (i = 0; i < num_entries; ++i) { + struct dmub_debugfs_trace_entry *entry = &entries[i]; + + seq_printf(m, + "trace_code=%u tick_count=%u param0=%u param1=%u\n", + entry->trace_code, entry->tick_count, entry->param0, + entry->param1); + } + + return 0; +} + +/* + * Returns the DMCUB firmware state contents. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmub_fw_state + */ +static int dmub_fw_state_show(struct seq_file *m, void *data) +{ + struct amdgpu_device *adev = m->private; + struct dmub_srv_fb_info *fb_info = adev->dm.dmub_fb_info; + uint8_t *state_base; + uint32_t state_size; + + if (!fb_info) + return 0; + + state_base = (uint8_t *)fb_info->fb[DMUB_WINDOW_6_FW_STATE].cpu_addr; + if (!state_base) + return 0; + + state_size = fb_info->fb[DMUB_WINDOW_6_FW_STATE].size; + + return seq_write(m, state_base, state_size); +} + +/* psr_capability_show() - show eDP panel PSR capability + * + * The read function: sink_psr_capability_show + * Shows if sink has PSR capability or not. + * If yes - the PSR version is appended + * + * cat /sys/kernel/debug/dri/0/eDP-X/psr_capability + * + * Expected output: + * "Sink support: no\n" - if panel doesn't support PSR + * "Sink support: yes [0x01]\n" - if panel supports PSR1 + * "Driver support: no\n" - if driver doesn't support PSR + * "Driver support: yes [0x01]\n" - if driver supports PSR1 + */ +static int psr_capability_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + struct dc_link *link = aconnector->dc_link; + + if (!link) + return -ENODEV; + + if (link->type == dc_connection_none) + return -ENODEV; + + if (!(link->connector_signal & SIGNAL_TYPE_EDP)) + return -ENODEV; + + seq_printf(m, "Sink support: %s", str_yes_no(link->dpcd_caps.psr_info.psr_version != 0)); + if (link->dpcd_caps.psr_info.psr_version) + seq_printf(m, " [0x%02x]", link->dpcd_caps.psr_info.psr_version); + seq_puts(m, "\n"); + + seq_printf(m, "Driver support: %s", str_yes_no(link->psr_settings.psr_feature_enabled)); + if (link->psr_settings.psr_version) + seq_printf(m, " [0x%02x]", link->psr_settings.psr_version); + seq_puts(m, "\n"); + + return 0; +} + +/* + * Returns the current bpc for the crtc. + * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_bpc + */ +static int amdgpu_current_bpc_show(struct seq_file *m, void *data) +{ + struct drm_crtc *crtc = m->private; + struct drm_device *dev = crtc->dev; + struct dm_crtc_state *dm_crtc_state = NULL; + int res = -ENODEV; + unsigned int bpc; + + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state == NULL) + goto unlock; + + dm_crtc_state = to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream == NULL) + goto unlock; + + switch (dm_crtc_state->stream->timing.display_color_depth) { + case COLOR_DEPTH_666: + bpc = 6; + break; + case COLOR_DEPTH_888: + bpc = 8; + break; + case COLOR_DEPTH_101010: + bpc = 10; + break; + case COLOR_DEPTH_121212: + bpc = 12; + break; + case COLOR_DEPTH_161616: + bpc = 16; + break; + default: + goto unlock; + } + + seq_printf(m, "Current: %u\n", bpc); + res = 0; + +unlock: + drm_modeset_unlock(&crtc->mutex); + mutex_unlock(&dev->mode_config.mutex); + + return res; +} +DEFINE_SHOW_ATTRIBUTE(amdgpu_current_bpc); + +/* + * Returns the current colorspace for the crtc. + * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/amdgpu_current_colorspace + */ +static int amdgpu_current_colorspace_show(struct seq_file *m, void *data) +{ + struct drm_crtc *crtc = m->private; + struct drm_device *dev = crtc->dev; + struct dm_crtc_state *dm_crtc_state = NULL; + int res = -ENODEV; + + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state == NULL) + goto unlock; + + dm_crtc_state = to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream == NULL) + goto unlock; + + switch (dm_crtc_state->stream->output_color_space) { + case COLOR_SPACE_SRGB: + seq_puts(m, "sRGB"); + break; + case COLOR_SPACE_YCBCR601: + case COLOR_SPACE_YCBCR601_LIMITED: + seq_puts(m, "BT601_YCC"); + break; + case COLOR_SPACE_YCBCR709: + case COLOR_SPACE_YCBCR709_LIMITED: + seq_puts(m, "BT709_YCC"); + break; + case COLOR_SPACE_ADOBERGB: + seq_puts(m, "opRGB"); + break; + case COLOR_SPACE_2020_RGB_FULLRANGE: + seq_puts(m, "BT2020_RGB"); + break; + case COLOR_SPACE_2020_YCBCR: + seq_puts(m, "BT2020_YCC"); + break; + default: + goto unlock; + } + res = 0; + +unlock: + drm_modeset_unlock(&crtc->mutex); + mutex_unlock(&dev->mode_config.mutex); + + return res; +} +DEFINE_SHOW_ATTRIBUTE(amdgpu_current_colorspace); + + +/* + * Example usage: + * Disable dsc passthrough, i.e.,: have dsc decoding at converver, not external RX + * echo 1 /sys/kernel/debug/dri/0/DP-1/dsc_disable_passthrough + * Enable dsc passthrough, i.e.,: have dsc passthrough to external RX + * echo 0 /sys/kernel/debug/dri/0/DP-1/dsc_disable_passthrough + */ +static ssize_t dp_dsc_passthrough_set(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + long param; + uint8_t param_nums = 0; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + ¶m, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + aconnector->dsc_settings.dsc_force_disable_passthrough = param; + + kfree(wr_buf); + return 0; +} + +/* + * Returns the HDCP capability of the Display (1.4 for now). + * + * NOTE* Not all HDMI displays report their HDCP caps even when they are capable. + * Since its rare for a display to not be HDCP 1.4 capable, we set HDMI as always capable. + * + * Example usage: cat /sys/kernel/debug/dri/0/DP-1/hdcp_sink_capability + * or cat /sys/kernel/debug/dri/0/HDMI-A-1/hdcp_sink_capability + */ +static int hdcp_sink_capability_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + bool hdcp_cap, hdcp2_cap; + + if (connector->status != connector_status_connected) + return -ENODEV; + + seq_printf(m, "%s:%d HDCP version: ", connector->name, connector->base.id); + + hdcp_cap = dc_link_is_hdcp14(aconnector->dc_link, aconnector->dc_sink->sink_signal); + hdcp2_cap = dc_link_is_hdcp22(aconnector->dc_link, aconnector->dc_sink->sink_signal); + + + if (hdcp_cap) + seq_printf(m, "%s ", "HDCP1.4"); + if (hdcp2_cap) + seq_printf(m, "%s ", "HDCP2.2"); + + if (!hdcp_cap && !hdcp2_cap) + seq_printf(m, "%s ", "None"); + + seq_puts(m, "\n"); + + return 0; +} + +/* + * Returns whether the connected display is internal and not hotpluggable. + * Example usage: cat /sys/kernel/debug/dri/0/DP-1/internal_display + */ +static int internal_display_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + struct dc_link *link = aconnector->dc_link; + + seq_printf(m, "Internal: %u\n", link->is_internal_display); + + return 0; +} + +/* function description + * + * generic SDP message access for testing + * + * debugfs sdp_message is located at /syskernel/debug/dri/0/DP-x + * + * SDP header + * Hb0 : Secondary-Data Packet ID + * Hb1 : Secondary-Data Packet type + * Hb2 : Secondary-Data-packet-specific header, Byte 0 + * Hb3 : Secondary-Data-packet-specific header, Byte 1 + * + * for using custom sdp message: input 4 bytes SDP header and 32 bytes raw data + */ +static ssize_t dp_sdp_message_debugfs_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + int r; + uint8_t data[36]; + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dm_crtc_state *acrtc_state; + uint32_t write_size = 36; + + if (connector->base.status != connector_status_connected) + return -ENODEV; + + if (size == 0) + return 0; + + acrtc_state = to_dm_crtc_state(connector->base.state->crtc->state); + + r = copy_from_user(data, buf, write_size); + + write_size -= r; + + dc_stream_send_dp_sdp(acrtc_state->stream, data, write_size); + + return write_size; +} + +/* function: Read link's DSC & FEC capabilities + * + * + * Access it with the following command (you need to specify + * connector like DP-1): + * + * cat /sys/kernel/debug/dri/0/DP-X/dp_dsc_fec_support + * + */ +static int dp_dsc_fec_support_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct drm_modeset_acquire_ctx ctx; + struct drm_device *dev = connector->dev; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + int ret = 0; + bool try_again = false; + bool is_fec_supported = false; + bool is_dsc_supported = false; + struct dpcd_caps dpcd_caps; + + drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); + do { + try_again = false; + ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx); + if (ret) { + if (ret == -EDEADLK) { + ret = drm_modeset_backoff(&ctx); + if (!ret) { + try_again = true; + continue; + } + } + break; + } + if (connector->status != connector_status_connected) { + ret = -ENODEV; + break; + } + dpcd_caps = aconnector->dc_link->dpcd_caps; + if (aconnector->mst_output_port) { + /* aconnector sets dsc_aux during get_modes call + * if MST connector has it means it can either + * enable DSC on the sink device or on MST branch + * its connected to. + */ + if (aconnector->dsc_aux) { + is_fec_supported = true; + is_dsc_supported = true; + } + } else { + is_fec_supported = dpcd_caps.fec_cap.raw & 0x1; + is_dsc_supported = dpcd_caps.dsc_caps.dsc_basic_caps.raw[0] & 0x1; + } + } while (try_again); + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + + seq_printf(m, "FEC_Sink_Support: %s\n", str_yes_no(is_fec_supported)); + seq_printf(m, "DSC_Sink_Support: %s\n", str_yes_no(is_dsc_supported)); + + return ret; +} + +/* function: Trigger virtual HPD redetection on connector + * + * This function will perform link rediscovery, link disable + * and enable, and dm connector state update. + * + * Retrigger HPD on an existing connector by echoing 1 into + * its respectful "trigger_hotplug" debugfs entry: + * + * echo 1 > /sys/kernel/debug/dri/0/DP-X/trigger_hotplug + * + * This function can perform HPD unplug: + * + * echo 0 > /sys/kernel/debug/dri/0/DP-X/trigger_hotplug + * + */ +static ssize_t trigger_hotplug(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct drm_connector *connector = &aconnector->base; + struct dc_link *link = NULL; + struct drm_device *dev = connector->dev; + struct amdgpu_device *adev = drm_to_adev(dev); + enum dc_connection_type new_connection_type = dc_connection_none; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + long param[1] = {0}; + uint8_t param_nums = 0; + bool ret = false; + + if (!aconnector || !aconnector->dc_link) + return -EINVAL; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + kfree(wr_buf); + + if (param_nums <= 0) { + DRM_DEBUG_DRIVER("user data not be read\n"); + return -EINVAL; + } + + mutex_lock(&aconnector->hpd_lock); + + /* Don't support for mst end device*/ + if (aconnector->mst_root) { + mutex_unlock(&aconnector->hpd_lock); + return -EINVAL; + } + + if (param[0] == 1) { + + if (!dc_link_detect_connection_type(aconnector->dc_link, &new_connection_type) && + new_connection_type != dc_connection_none) + goto unlock; + + mutex_lock(&adev->dm.dc_lock); + ret = dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD); + mutex_unlock(&adev->dm.dc_lock); + + if (!ret) + goto unlock; + + amdgpu_dm_update_connector_after_detect(aconnector); + + drm_modeset_lock_all(dev); + dm_restore_drm_connector_state(dev, connector); + drm_modeset_unlock_all(dev); + + drm_kms_helper_connector_hotplug_event(connector); + } else if (param[0] == 0) { + if (!aconnector->dc_link) + goto unlock; + + link = aconnector->dc_link; + + if (link->local_sink) { + dc_sink_release(link->local_sink); + link->local_sink = NULL; + } + + link->dpcd_sink_count = 0; + link->type = dc_connection_none; + link->dongle_max_pix_clk = 0; + + amdgpu_dm_update_connector_after_detect(aconnector); + + /* If the aconnector is the root node in mst topology */ + if (aconnector->mst_mgr.mst_state == true) + dc_link_reset_cur_dp_mst_topology(link); + + drm_modeset_lock_all(dev); + dm_restore_drm_connector_state(dev, connector); + drm_modeset_unlock_all(dev); + + drm_kms_helper_connector_hotplug_event(connector); + } + +unlock: + mutex_unlock(&aconnector->hpd_lock); + + return size; +} + +/* function: read DSC status on the connector + * + * The read function: dp_dsc_clock_en_read + * returns current status of DSC clock on the connector. + * The return is a boolean flag: 1 or 0. + * + * Access it with the following command (you need to specify + * connector like DP-1): + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_clock_en + * + * Expected output: + * 1 - means that DSC is currently enabled + * 0 - means that DSC is disabled + */ +static ssize_t dp_dsc_clock_en_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 10; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_clock_en); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +/* function: write force DSC on the connector + * + * The write function: dp_dsc_clock_en_write + * enables to force DSC on the connector. + * User can write to either force enable or force disable DSC + * on the next modeset or set it to driver default + * + * Accepted inputs: + * 0 - default DSC enablement policy + * 1 - force enable DSC on the connector + * 2 - force disable DSC on the connector (might cause fail in atomic_check) + * + * Writing DSC settings is done with the following command: + * - To force enable DSC (you need to specify + * connector like DP-1): + * + * echo 0x1 > /sys/kernel/debug/dri/0/DP-X/dsc_clock_en + * + * - To return to default state set the flag to zero and + * let driver deal with DSC automatically + * (you need to specify connector like DP-1): + * + * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_clock_en + * + */ +static ssize_t dp_dsc_clock_en_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct drm_crtc *crtc = NULL; + struct dm_crtc_state *dm_crtc_state = NULL; + struct pipe_ctx *pipe_ctx; + int i; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + long param[1] = {0}; + uint8_t param_nums = 0; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + DRM_DEBUG_DRIVER("user data not be read\n"); + kfree(wr_buf); + return -EINVAL; + } + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + if (!pipe_ctx->stream) + goto done; + + // Get CRTC state + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + if (connector->state == NULL) + goto unlock; + + crtc = connector->state->crtc; + if (crtc == NULL) + goto unlock; + + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state == NULL) + goto unlock; + + dm_crtc_state = to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream == NULL) + goto unlock; + + if (param[0] == 1) + aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_ENABLE; + else if (param[0] == 2) + aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_DISABLE; + else + aconnector->dsc_settings.dsc_force_enable = DSC_CLK_FORCE_DEFAULT; + + dm_crtc_state->dsc_force_changed = true; + +unlock: + if (crtc) + drm_modeset_unlock(&crtc->mutex); + drm_modeset_unlock(&dev->mode_config.connection_mutex); + mutex_unlock(&dev->mode_config.mutex); + +done: + kfree(wr_buf); + return size; +} + +/* function: read DSC slice width parameter on the connector + * + * The read function: dp_dsc_slice_width_read + * returns dsc slice width used in the current configuration + * The return is an integer: 0 or other positive number + * + * Access the status with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_width + * + * 0 - means that DSC is disabled + * + * Any other number more than zero represents the + * slice width currently used by DSC in pixels + * + */ +static ssize_t dp_dsc_slice_width_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_slice_width); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +/* function: write DSC slice width parameter + * + * The write function: dp_dsc_slice_width_write + * overwrites automatically generated DSC configuration + * of slice width. + * + * The user has to write the slice width divisible by the + * picture width. + * + * Also the user has to write width in hexidecimal + * rather than in decimal. + * + * Writing DSC settings is done with the following command: + * - To force overwrite slice width: (example sets to 1920 pixels) + * + * echo 0x780 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_width + * + * - To stop overwriting and let driver find the optimal size, + * set the width to zero: + * + * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_width + * + */ +static ssize_t dp_dsc_slice_width_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct pipe_ctx *pipe_ctx; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct drm_crtc *crtc = NULL; + struct dm_crtc_state *dm_crtc_state = NULL; + int i; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + long param[1] = {0}; + uint8_t param_nums = 0; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + DRM_DEBUG_DRIVER("user data not be read\n"); + kfree(wr_buf); + return -EINVAL; + } + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + if (!pipe_ctx->stream) + goto done; + + // Safely get CRTC state + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + if (connector->state == NULL) + goto unlock; + + crtc = connector->state->crtc; + if (crtc == NULL) + goto unlock; + + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state == NULL) + goto unlock; + + dm_crtc_state = to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream == NULL) + goto unlock; + + if (param[0] > 0) + aconnector->dsc_settings.dsc_num_slices_h = DIV_ROUND_UP( + pipe_ctx->stream->timing.h_addressable, + param[0]); + else + aconnector->dsc_settings.dsc_num_slices_h = 0; + + dm_crtc_state->dsc_force_changed = true; + +unlock: + if (crtc) + drm_modeset_unlock(&crtc->mutex); + drm_modeset_unlock(&dev->mode_config.connection_mutex); + mutex_unlock(&dev->mode_config.mutex); + +done: + kfree(wr_buf); + return size; +} + +/* function: read DSC slice height parameter on the connector + * + * The read function: dp_dsc_slice_height_read + * returns dsc slice height used in the current configuration + * The return is an integer: 0 or other positive number + * + * Access the status with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_height + * + * 0 - means that DSC is disabled + * + * Any other number more than zero represents the + * slice height currently used by DSC in pixels + * + */ +static ssize_t dp_dsc_slice_height_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_slice_height); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +/* function: write DSC slice height parameter + * + * The write function: dp_dsc_slice_height_write + * overwrites automatically generated DSC configuration + * of slice height. + * + * The user has to write the slice height divisible by the + * picture height. + * + * Also the user has to write height in hexidecimal + * rather than in decimal. + * + * Writing DSC settings is done with the following command: + * - To force overwrite slice height (example sets to 128 pixels): + * + * echo 0x80 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_height + * + * - To stop overwriting and let driver find the optimal size, + * set the height to zero: + * + * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_slice_height + * + */ +static ssize_t dp_dsc_slice_height_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct drm_crtc *crtc = NULL; + struct dm_crtc_state *dm_crtc_state = NULL; + struct pipe_ctx *pipe_ctx; + int i; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + uint8_t param_nums = 0; + long param[1] = {0}; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + DRM_DEBUG_DRIVER("user data not be read\n"); + kfree(wr_buf); + return -EINVAL; + } + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + if (!pipe_ctx->stream) + goto done; + + // Get CRTC state + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + if (connector->state == NULL) + goto unlock; + + crtc = connector->state->crtc; + if (crtc == NULL) + goto unlock; + + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state == NULL) + goto unlock; + + dm_crtc_state = to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream == NULL) + goto unlock; + + if (param[0] > 0) + aconnector->dsc_settings.dsc_num_slices_v = DIV_ROUND_UP( + pipe_ctx->stream->timing.v_addressable, + param[0]); + else + aconnector->dsc_settings.dsc_num_slices_v = 0; + + dm_crtc_state->dsc_force_changed = true; + +unlock: + if (crtc) + drm_modeset_unlock(&crtc->mutex); + drm_modeset_unlock(&dev->mode_config.connection_mutex); + mutex_unlock(&dev->mode_config.mutex); + +done: + kfree(wr_buf); + return size; +} + +/* function: read DSC target rate on the connector in bits per pixel + * + * The read function: dp_dsc_bits_per_pixel_read + * returns target rate of compression in bits per pixel + * The return is an integer: 0 or other positive integer + * + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel + * + * 0 - means that DSC is disabled + */ +static ssize_t dp_dsc_bits_per_pixel_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_bits_per_pixel); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +/* function: write DSC target rate in bits per pixel + * + * The write function: dp_dsc_bits_per_pixel_write + * overwrites automatically generated DSC configuration + * of DSC target bit rate. + * + * Also the user has to write bpp in hexidecimal + * rather than in decimal. + * + * Writing DSC settings is done with the following command: + * - To force overwrite rate (example sets to 256 bpp x 1/16): + * + * echo 0x100 > /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel + * + * - To stop overwriting and let driver find the optimal rate, + * set the rate to zero: + * + * echo 0x0 > /sys/kernel/debug/dri/0/DP-X/dsc_bits_per_pixel + * + */ +static ssize_t dp_dsc_bits_per_pixel_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct drm_crtc *crtc = NULL; + struct dm_crtc_state *dm_crtc_state = NULL; + struct pipe_ctx *pipe_ctx; + int i; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + uint8_t param_nums = 0; + long param[1] = {0}; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + DRM_DEBUG_DRIVER("user data not be read\n"); + kfree(wr_buf); + return -EINVAL; + } + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + if (!pipe_ctx->stream) + goto done; + + // Get CRTC state + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + if (connector->state == NULL) + goto unlock; + + crtc = connector->state->crtc; + if (crtc == NULL) + goto unlock; + + drm_modeset_lock(&crtc->mutex, NULL); + if (crtc->state == NULL) + goto unlock; + + dm_crtc_state = to_dm_crtc_state(crtc->state); + if (dm_crtc_state->stream == NULL) + goto unlock; + + aconnector->dsc_settings.dsc_bits_per_pixel = param[0]; + + dm_crtc_state->dsc_force_changed = true; + +unlock: + if (crtc) + drm_modeset_unlock(&crtc->mutex); + drm_modeset_unlock(&dev->mode_config.connection_mutex); + mutex_unlock(&dev->mode_config.mutex); + +done: + kfree(wr_buf); + return size; +} + +/* function: read DSC picture width parameter on the connector + * + * The read function: dp_dsc_pic_width_read + * returns dsc picture width used in the current configuration + * It is the same as h_addressable of the current + * display's timing + * The return is an integer: 0 or other positive integer + * If 0 then DSC is disabled. + * + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_pic_width + * + * 0 - means that DSC is disabled + */ +static ssize_t dp_dsc_pic_width_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_pic_width); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +static ssize_t dp_dsc_pic_height_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_pic_height); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +/* function: read DSC chunk size parameter on the connector + * + * The read function: dp_dsc_chunk_size_read + * returns dsc chunk size set in the current configuration + * The value is calculated automatically by DSC code + * and depends on slice parameters and bpp target rate + * The return is an integer: 0 or other positive integer + * If 0 then DSC is disabled. + * + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_chunk_size + * + * 0 - means that DSC is disabled + */ +static ssize_t dp_dsc_chunk_size_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_chunk_size); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +/* function: read DSC slice bpg offset on the connector + * + * The read function: dp_dsc_slice_bpg_offset_read + * returns dsc bpg slice offset set in the current configuration + * The value is calculated automatically by DSC code + * and depends on slice parameters and bpp target rate + * The return is an integer: 0 or other positive integer + * If 0 then DSC is disabled. + * + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/dsc_slice_bpg_offset + * + * 0 - means that DSC is disabled + */ +static ssize_t dp_dsc_slice_bpg_offset_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct display_stream_compressor *dsc; + struct dcn_dsc_state dsc_state = {0}; + const uint32_t rd_buf_size = 100; + struct pipe_ctx *pipe_ctx; + ssize_t result = 0; + int i, r, str_len = 30; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + rd_buf_ptr = rd_buf; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &aconnector->dc_link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx->stream && + pipe_ctx->stream->link == aconnector->dc_link) + break; + } + + dsc = pipe_ctx->stream_res.dsc; + if (dsc) + dsc->funcs->dsc_read_state(dsc, &dsc_state); + + snprintf(rd_buf_ptr, str_len, + "%d\n", + dsc_state.dsc_slice_bpg_offset); + rd_buf_ptr += str_len; + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + + +/* + * function description: Read max_requested_bpc property from the connector + * + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/max_bpc + * + */ +static ssize_t dp_max_bpc_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct dm_connector_state *state; + ssize_t result = 0; + char *rd_buf = NULL; + char *rd_buf_ptr = NULL; + const uint32_t rd_buf_size = 10; + int r; + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + + if (!rd_buf) + return -ENOMEM; + + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + if (connector->state == NULL) + goto unlock; + + state = to_dm_connector_state(connector->state); + + rd_buf_ptr = rd_buf; + snprintf(rd_buf_ptr, rd_buf_size, + "%u\n", + state->base.max_requested_bpc); + + while (size) { + if (*pos >= rd_buf_size) + break; + + r = put_user(*(rd_buf + result), buf); + if (r) { + result = r; /* r = -EFAULT */ + goto unlock; + } + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } +unlock: + drm_modeset_unlock(&dev->mode_config.connection_mutex); + mutex_unlock(&dev->mode_config.mutex); + kfree(rd_buf); + return result; +} + + +/* + * function description: Set max_requested_bpc property on the connector + * + * This function will not force the input BPC on connector, it will only + * change the max value. This is equivalent to setting max_bpc through + * xrandr. + * + * The BPC value written must be >= 6 and <= 16. Values outside of this + * range will result in errors. + * + * BPC values: + * 0x6 - 6 BPC + * 0x8 - 8 BPC + * 0xa - 10 BPC + * 0xc - 12 BPC + * 0x10 - 16 BPC + * + * Write the max_bpc in the following way: + * + * echo 0x6 > /sys/kernel/debug/dri/0/DP-X/max_bpc + * + */ +static ssize_t dp_max_bpc_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *aconnector = file_inode(f)->i_private; + struct drm_connector *connector = &aconnector->base; + struct dm_connector_state *state; + struct drm_device *dev = connector->dev; + char *wr_buf = NULL; + uint32_t wr_buf_size = 42; + int max_param_num = 1; + long param[1] = {0}; + uint8_t param_nums = 0; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + + if (!wr_buf) { + DRM_DEBUG_DRIVER("no memory to allocate write buffer\n"); + return -ENOSPC; + } + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + DRM_DEBUG_DRIVER("user data not be read\n"); + kfree(wr_buf); + return -EINVAL; + } + + if (param[0] < 6 || param[0] > 16) { + DRM_DEBUG_DRIVER("bad max_bpc value\n"); + kfree(wr_buf); + return -EINVAL; + } + + mutex_lock(&dev->mode_config.mutex); + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); + + if (connector->state == NULL) + goto unlock; + + state = to_dm_connector_state(connector->state); + state->base.max_requested_bpc = param[0]; +unlock: + drm_modeset_unlock(&dev->mode_config.connection_mutex); + mutex_unlock(&dev->mode_config.mutex); + + kfree(wr_buf); + return size; +} + +/* + * Backlight at this moment. Read only. + * As written to display, taking ABM and backlight lut into account. + * Ranges from 0x0 to 0x10000 (= 100% PWM) + * + * Example usage: cat /sys/kernel/debug/dri/0/eDP-1/current_backlight + */ +static int current_backlight_show(struct seq_file *m, void *unused) +{ + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private); + struct dc_link *link = aconnector->dc_link; + unsigned int backlight; + + backlight = dc_link_get_backlight_level(link); + seq_printf(m, "0x%x\n", backlight); + + return 0; +} + +/* + * Backlight value that is being approached. Read only. + * As written to display, taking ABM and backlight lut into account. + * Ranges from 0x0 to 0x10000 (= 100% PWM) + * + * Example usage: cat /sys/kernel/debug/dri/0/eDP-1/target_backlight + */ +static int target_backlight_show(struct seq_file *m, void *unused) +{ + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private); + struct dc_link *link = aconnector->dc_link; + unsigned int backlight; + + backlight = dc_link_get_target_backlight_pwm(link); + seq_printf(m, "0x%x\n", backlight); + + return 0; +} + +/* + * function description: Determine if the connector is mst connector + * + * This function helps to determine whether a connector is a mst connector. + * - "root" stands for the root connector of the topology + * - "branch" stands for branch device of the topology + * - "end" stands for leaf node connector of the topology + * - "no" stands for the connector is not a device of a mst topology + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/is_mst_connector + * + */ +static int dp_is_mst_connector_show(struct seq_file *m, void *unused) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + struct drm_dp_mst_topology_mgr *mgr = NULL; + struct drm_dp_mst_port *port = NULL; + char *role = NULL; + + mutex_lock(&aconnector->hpd_lock); + + if (aconnector->mst_mgr.mst_state) { + role = "root"; + } else if (aconnector->mst_root && + aconnector->mst_root->mst_mgr.mst_state) { + + role = "end"; + + mgr = &aconnector->mst_root->mst_mgr; + port = aconnector->mst_output_port; + + drm_modeset_lock(&mgr->base.lock, NULL); + if (port->pdt == DP_PEER_DEVICE_MST_BRANCHING && + port->mcs) + role = "branch"; + drm_modeset_unlock(&mgr->base.lock); + + } else { + role = "no"; + } + + seq_printf(m, "%s\n", role); + + mutex_unlock(&aconnector->hpd_lock); + + return 0; +} + +/* + * function description: Read out the mst progress status + * + * This function helps to determine the mst progress status of + * a mst connector. + * + * Access it with the following command: + * + * cat /sys/kernel/debug/dri/0/DP-X/mst_progress_status + * + */ +static int dp_mst_progress_status_show(struct seq_file *m, void *unused) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + struct amdgpu_device *adev = drm_to_adev(connector->dev); + int i; + + mutex_lock(&aconnector->hpd_lock); + mutex_lock(&adev->dm.dc_lock); + + if (aconnector->mst_status == MST_STATUS_DEFAULT) { + seq_puts(m, "disabled\n"); + } else { + for (i = 0; i < sizeof(mst_progress_status)/sizeof(char *); i++) + seq_printf(m, "%s:%s\n", + mst_progress_status[i], + aconnector->mst_status & BIT(i) ? "done" : "not_done"); + } + + mutex_unlock(&adev->dm.dc_lock); + mutex_unlock(&aconnector->hpd_lock); + + return 0; +} + +/* + * Reports whether the connected display is a USB4 DPIA tunneled display + * Example usage: cat /sys/kernel/debug/dri/0/DP-8/is_dpia_link + */ +static int is_dpia_link_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector); + struct dc_link *link = aconnector->dc_link; + + if (connector->status != connector_status_connected) + return -ENODEV; + + seq_printf(m, "%s\n", (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA) ? "yes" : + (link->ep_type == DISPLAY_ENDPOINT_PHY) ? "no" : "unknown"); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(dp_dsc_fec_support); +DEFINE_SHOW_ATTRIBUTE(dmub_fw_state); +DEFINE_SHOW_ATTRIBUTE(dmub_tracebuffer); +DEFINE_SHOW_ATTRIBUTE(dp_lttpr_status); +DEFINE_SHOW_ATTRIBUTE(hdcp_sink_capability); +DEFINE_SHOW_ATTRIBUTE(internal_display); +DEFINE_SHOW_ATTRIBUTE(psr_capability); +DEFINE_SHOW_ATTRIBUTE(dp_is_mst_connector); +DEFINE_SHOW_ATTRIBUTE(dp_mst_progress_status); +DEFINE_SHOW_ATTRIBUTE(is_dpia_link); + +static const struct file_operations dp_dsc_clock_en_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_clock_en_read, + .write = dp_dsc_clock_en_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_slice_width_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_slice_width_read, + .write = dp_dsc_slice_width_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_slice_height_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_slice_height_read, + .write = dp_dsc_slice_height_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_bits_per_pixel_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_bits_per_pixel_read, + .write = dp_dsc_bits_per_pixel_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_pic_width_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_pic_width_read, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_pic_height_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_pic_height_read, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_chunk_size_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_chunk_size_read, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_slice_bpg_offset_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_dsc_slice_bpg_offset_read, + .llseek = default_llseek +}; + +static const struct file_operations trigger_hotplug_debugfs_fops = { + .owner = THIS_MODULE, + .write = trigger_hotplug, + .llseek = default_llseek +}; + +static const struct file_operations dp_link_settings_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_link_settings_read, + .write = dp_link_settings_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_phy_settings_debugfs_fop = { + .owner = THIS_MODULE, + .read = dp_phy_settings_read, + .write = dp_phy_settings_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_phy_test_pattern_fops = { + .owner = THIS_MODULE, + .write = dp_phy_test_pattern_debugfs_write, + .llseek = default_llseek +}; + +static const struct file_operations sdp_message_fops = { + .owner = THIS_MODULE, + .write = dp_sdp_message_debugfs_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_max_bpc_debugfs_fops = { + .owner = THIS_MODULE, + .read = dp_max_bpc_read, + .write = dp_max_bpc_write, + .llseek = default_llseek +}; + +static const struct file_operations dp_dsc_disable_passthrough_debugfs_fops = { + .owner = THIS_MODULE, + .write = dp_dsc_passthrough_set, + .llseek = default_llseek +}; + +static const struct file_operations dp_mst_link_settings_debugfs_fops = { + .owner = THIS_MODULE, + .write = dp_mst_link_setting, + .llseek = default_llseek +}; + +static const struct { + char *name; + const struct file_operations *fops; +} dp_debugfs_entries[] = { + {"link_settings", &dp_link_settings_debugfs_fops}, + {"phy_settings", &dp_phy_settings_debugfs_fop}, + {"lttpr_status", &dp_lttpr_status_fops}, + {"test_pattern", &dp_phy_test_pattern_fops}, + {"hdcp_sink_capability", &hdcp_sink_capability_fops}, + {"sdp_message", &sdp_message_fops}, + {"dsc_clock_en", &dp_dsc_clock_en_debugfs_fops}, + {"dsc_slice_width", &dp_dsc_slice_width_debugfs_fops}, + {"dsc_slice_height", &dp_dsc_slice_height_debugfs_fops}, + {"dsc_bits_per_pixel", &dp_dsc_bits_per_pixel_debugfs_fops}, + {"dsc_pic_width", &dp_dsc_pic_width_debugfs_fops}, + {"dsc_pic_height", &dp_dsc_pic_height_debugfs_fops}, + {"dsc_chunk_size", &dp_dsc_chunk_size_debugfs_fops}, + {"dsc_slice_bpg", &dp_dsc_slice_bpg_offset_debugfs_fops}, + {"dp_dsc_fec_support", &dp_dsc_fec_support_fops}, + {"max_bpc", &dp_max_bpc_debugfs_fops}, + {"dsc_disable_passthrough", &dp_dsc_disable_passthrough_debugfs_fops}, + {"is_mst_connector", &dp_is_mst_connector_fops}, + {"mst_progress_status", &dp_mst_progress_status_fops}, + {"is_dpia_link", &is_dpia_link_fops}, + {"mst_link_settings", &dp_mst_link_settings_debugfs_fops} +}; + +static const struct { + char *name; + const struct file_operations *fops; +} hdmi_debugfs_entries[] = { + {"hdcp_sink_capability", &hdcp_sink_capability_fops} +}; + +/* + * Force YUV420 output if available from the given mode + */ +static int force_yuv420_output_set(void *data, u64 val) +{ + struct amdgpu_dm_connector *connector = data; + + connector->force_yuv420_output = (bool)val; + + return 0; +} + +/* + * Check if YUV420 is forced when available from the given mode + */ +static int force_yuv420_output_get(void *data, u64 *val) +{ + struct amdgpu_dm_connector *connector = data; + + *val = connector->force_yuv420_output; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(force_yuv420_output_fops, force_yuv420_output_get, + force_yuv420_output_set, "%llu\n"); + +/* + * Read PSR state + */ +static int psr_get(void *data, u64 *val) +{ + struct amdgpu_dm_connector *connector = data; + struct dc_link *link = connector->dc_link; + enum dc_psr_state state = PSR_STATE0; + + dc_link_get_psr_state(link, &state); + + *val = state; + + return 0; +} + +/* + * Read PSR state residency + */ +static int psr_read_residency(void *data, u64 *val) +{ + struct amdgpu_dm_connector *connector = data; + struct dc_link *link = connector->dc_link; + u32 residency; + + link->dc->link_srv->edp_get_psr_residency(link, &residency); + + *val = (u64)residency; + + return 0; +} + +/* read allow_edp_hotplug_detection */ +static int allow_edp_hotplug_detection_get(void *data, u64 *val) +{ + struct amdgpu_dm_connector *aconnector = data; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct amdgpu_device *adev = drm_to_adev(dev); + + *val = adev->dm.dc->config.allow_edp_hotplug_detection; + + return 0; +} + +/* set allow_edp_hotplug_detection */ +static int allow_edp_hotplug_detection_set(void *data, u64 val) +{ + struct amdgpu_dm_connector *aconnector = data; + struct drm_connector *connector = &aconnector->base; + struct drm_device *dev = connector->dev; + struct amdgpu_device *adev = drm_to_adev(dev); + + adev->dm.dc->config.allow_edp_hotplug_detection = (uint32_t) val; + + return 0; +} + +/* + * Set dmcub trace event IRQ enable or disable. + * Usage to enable dmcub trace event IRQ: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en + * Usage to disable dmcub trace event IRQ: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en + */ +static int dmcub_trace_event_state_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + if (val == 1 || val == 0) { + dc_dmub_trace_event_control(adev->dm.dc, val); + adev->dm.dmcub_trace_event_en = (bool)val; + } else + return 0; + + return 0; +} + +/* + * The interface doesn't need get function, so it will return the + * value of zero + * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en + */ +static int dmcub_trace_event_state_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dmcub_trace_event_en; + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(dmcub_trace_event_state_fops, dmcub_trace_event_state_get, + dmcub_trace_event_state_set, "%llu\n"); + +DEFINE_DEBUGFS_ATTRIBUTE(psr_fops, psr_get, NULL, "%llu\n"); +DEFINE_DEBUGFS_ATTRIBUTE(psr_residency_fops, psr_read_residency, NULL, + "%llu\n"); + +DEFINE_DEBUGFS_ATTRIBUTE(allow_edp_hotplug_detection_fops, + allow_edp_hotplug_detection_get, + allow_edp_hotplug_detection_set, "%llu\n"); + +DEFINE_SHOW_ATTRIBUTE(current_backlight); +DEFINE_SHOW_ATTRIBUTE(target_backlight); + +static const struct { + char *name; + const struct file_operations *fops; +} connector_debugfs_entries[] = { + {"force_yuv420_output", &force_yuv420_output_fops}, + {"trigger_hotplug", &trigger_hotplug_debugfs_fops}, + {"internal_display", &internal_display_fops} +}; + +/* + * Returns supported customized link rates by this eDP panel. + * Example usage: cat /sys/kernel/debug/dri/0/eDP-x/ilr_setting + */ +static int edp_ilr_show(struct seq_file *m, void *unused) +{ + struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(m->private); + struct dc_link *link = aconnector->dc_link; + uint8_t supported_link_rates[16]; + uint32_t link_rate_in_khz; + uint32_t entry = 0; + uint8_t dpcd_rev; + + memset(supported_link_rates, 0, sizeof(supported_link_rates)); + dm_helpers_dp_read_dpcd(link->ctx, link, DP_SUPPORTED_LINK_RATES, + supported_link_rates, sizeof(supported_link_rates)); + + dpcd_rev = link->dpcd_caps.dpcd_rev.raw; + + if (dpcd_rev >= DP_DPCD_REV_13 && + (supported_link_rates[entry+1] != 0 || supported_link_rates[entry] != 0)) { + + for (entry = 0; entry < 16; entry += 2) { + link_rate_in_khz = (supported_link_rates[entry+1] * 0x100 + + supported_link_rates[entry]) * 200; + seq_printf(m, "[%d] %d kHz\n", entry/2, link_rate_in_khz); + } + } else { + seq_puts(m, "ILR is not supported by this eDP panel.\n"); + } + + return 0; +} + +/* + * Set supported customized link rate to eDP panel. + * + * echo <lane_count> <link_rate option> > ilr_setting + * + * for example, supported ILR : [0] 1620000 kHz [1] 2160000 kHz [2] 2430000 kHz ... + * echo 4 1 > /sys/kernel/debug/dri/0/eDP-x/ilr_setting + * to set 4 lanes and 2.16 GHz + */ +static ssize_t edp_ilr_write(struct file *f, const char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_dm_connector *connector = file_inode(f)->i_private; + struct dc_link *link = connector->dc_link; + struct amdgpu_device *adev = drm_to_adev(connector->base.dev); + struct dc *dc = (struct dc *)link->dc; + struct dc_link_settings prefer_link_settings; + char *wr_buf = NULL; + const uint32_t wr_buf_size = 40; + /* 0: lane_count; 1: link_rate */ + int max_param_num = 2; + uint8_t param_nums = 0; + long param[2]; + bool valid_input = true; + + if (size == 0) + return -EINVAL; + + wr_buf = kcalloc(wr_buf_size, sizeof(char), GFP_KERNEL); + if (!wr_buf) + return -ENOMEM; + + if (parse_write_buffer_into_params(wr_buf, wr_buf_size, + (long *)param, buf, + max_param_num, + ¶m_nums)) { + kfree(wr_buf); + return -EINVAL; + } + + if (param_nums <= 0) { + kfree(wr_buf); + return -EINVAL; + } + + switch (param[0]) { + case LANE_COUNT_ONE: + case LANE_COUNT_TWO: + case LANE_COUNT_FOUR: + break; + default: + valid_input = false; + break; + } + + if (param[1] >= link->dpcd_caps.edp_supported_link_rates_count) + valid_input = false; + + if (!valid_input) { + kfree(wr_buf); + DRM_DEBUG_DRIVER("Invalid Input value. No HW will be programmed\n"); + prefer_link_settings.use_link_rate_set = false; + mutex_lock(&adev->dm.dc_lock); + dc_link_set_preferred_training_settings(dc, NULL, NULL, link, false); + mutex_unlock(&adev->dm.dc_lock); + return size; + } + + /* save user force lane_count, link_rate to preferred settings + * spread spectrum will not be changed + */ + prefer_link_settings.link_spread = link->cur_link_settings.link_spread; + prefer_link_settings.lane_count = param[0]; + prefer_link_settings.use_link_rate_set = true; + prefer_link_settings.link_rate_set = param[1]; + prefer_link_settings.link_rate = link->dpcd_caps.edp_supported_link_rates[param[1]]; + + mutex_lock(&adev->dm.dc_lock); + dc_link_set_preferred_training_settings(dc, &prefer_link_settings, + NULL, link, false); + mutex_unlock(&adev->dm.dc_lock); + + kfree(wr_buf); + return size; +} + +static int edp_ilr_open(struct inode *inode, struct file *file) +{ + return single_open(file, edp_ilr_show, inode->i_private); +} + +static const struct file_operations edp_ilr_debugfs_fops = { + .owner = THIS_MODULE, + .open = edp_ilr_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = edp_ilr_write +}; + +void connector_debugfs_init(struct amdgpu_dm_connector *connector) +{ + int i; + struct dentry *dir = connector->base.debugfs_entry; + + if (connector->base.connector_type == DRM_MODE_CONNECTOR_DisplayPort || + connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) { + for (i = 0; i < ARRAY_SIZE(dp_debugfs_entries); i++) { + debugfs_create_file(dp_debugfs_entries[i].name, + 0644, dir, connector, + dp_debugfs_entries[i].fops); + } + } + if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) { + debugfs_create_file_unsafe("psr_capability", 0444, dir, connector, &psr_capability_fops); + debugfs_create_file_unsafe("psr_state", 0444, dir, connector, &psr_fops); + debugfs_create_file_unsafe("psr_residency", 0444, dir, + connector, &psr_residency_fops); + debugfs_create_file("amdgpu_current_backlight_pwm", 0444, dir, connector, + ¤t_backlight_fops); + debugfs_create_file("amdgpu_target_backlight_pwm", 0444, dir, connector, + &target_backlight_fops); + debugfs_create_file("ilr_setting", 0644, dir, connector, + &edp_ilr_debugfs_fops); + debugfs_create_file("allow_edp_hotplug_detection", 0644, dir, connector, + &allow_edp_hotplug_detection_fops); + } + + for (i = 0; i < ARRAY_SIZE(connector_debugfs_entries); i++) { + debugfs_create_file(connector_debugfs_entries[i].name, + 0644, dir, connector, + connector_debugfs_entries[i].fops); + } + + if (connector->base.connector_type == DRM_MODE_CONNECTOR_HDMIA) { + for (i = 0; i < ARRAY_SIZE(hdmi_debugfs_entries); i++) { + debugfs_create_file(hdmi_debugfs_entries[i].name, + 0644, dir, connector, + hdmi_debugfs_entries[i].fops); + } + } +} + +#ifdef CONFIG_DRM_AMD_SECURE_DISPLAY +/* + * Set crc window coordinate x start + */ +static int crc_win_x_start_set(void *data, u64 val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + acrtc->dm_irq_params.window_param.x_start = (uint16_t) val; + acrtc->dm_irq_params.window_param.update_win = false; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +/* + * Get crc window coordinate x start + */ +static int crc_win_x_start_get(void *data, u64 *val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + *val = acrtc->dm_irq_params.window_param.x_start; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(crc_win_x_start_fops, crc_win_x_start_get, + crc_win_x_start_set, "%llu\n"); + + +/* + * Set crc window coordinate y start + */ +static int crc_win_y_start_set(void *data, u64 val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + acrtc->dm_irq_params.window_param.y_start = (uint16_t) val; + acrtc->dm_irq_params.window_param.update_win = false; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +/* + * Get crc window coordinate y start + */ +static int crc_win_y_start_get(void *data, u64 *val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + *val = acrtc->dm_irq_params.window_param.y_start; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(crc_win_y_start_fops, crc_win_y_start_get, + crc_win_y_start_set, "%llu\n"); + +/* + * Set crc window coordinate x end + */ +static int crc_win_x_end_set(void *data, u64 val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + acrtc->dm_irq_params.window_param.x_end = (uint16_t) val; + acrtc->dm_irq_params.window_param.update_win = false; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +/* + * Get crc window coordinate x end + */ +static int crc_win_x_end_get(void *data, u64 *val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + *val = acrtc->dm_irq_params.window_param.x_end; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(crc_win_x_end_fops, crc_win_x_end_get, + crc_win_x_end_set, "%llu\n"); + +/* + * Set crc window coordinate y end + */ +static int crc_win_y_end_set(void *data, u64 val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + acrtc->dm_irq_params.window_param.y_end = (uint16_t) val; + acrtc->dm_irq_params.window_param.update_win = false; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +/* + * Get crc window coordinate y end + */ +static int crc_win_y_end_get(void *data, u64 *val) +{ + struct drm_crtc *crtc = data; + struct drm_device *drm_dev = crtc->dev; + struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc); + + spin_lock_irq(&drm_dev->event_lock); + *val = acrtc->dm_irq_params.window_param.y_end; + spin_unlock_irq(&drm_dev->event_lock); + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(crc_win_y_end_fops, crc_win_y_end_get, + crc_win_y_end_set, "%llu\n"); +/* + * Trigger to commit crc window + */ +static int crc_win_update_set(void *data, u64 val) +{ + struct drm_crtc *crtc = data; + struct amdgpu_crtc *acrtc; + struct amdgpu_device *adev = drm_to_adev(crtc->dev); + + if (val) { + acrtc = to_amdgpu_crtc(crtc); + mutex_lock(&adev->dm.dc_lock); + /* PSR may write to OTG CRC window control register, + * so close it before starting secure_display. + */ + amdgpu_dm_psr_disable(acrtc->dm_irq_params.stream); + + spin_lock_irq(&adev_to_drm(adev)->event_lock); + + acrtc->dm_irq_params.window_param.activated = true; + acrtc->dm_irq_params.window_param.update_win = true; + acrtc->dm_irq_params.window_param.skip_frame_cnt = 0; + + spin_unlock_irq(&adev_to_drm(adev)->event_lock); + mutex_unlock(&adev->dm.dc_lock); + } + + return 0; +} + +/* + * Get crc window update flag + */ +static int crc_win_update_get(void *data, u64 *val) +{ + *val = 0; + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(crc_win_update_fops, crc_win_update_get, + crc_win_update_set, "%llu\n"); +#endif +void crtc_debugfs_init(struct drm_crtc *crtc) +{ +#ifdef CONFIG_DRM_AMD_SECURE_DISPLAY + struct dentry *dir = debugfs_lookup("crc", crtc->debugfs_entry); + + if (!dir) + return; + + debugfs_create_file_unsafe("crc_win_x_start", 0644, dir, crtc, + &crc_win_x_start_fops); + debugfs_create_file_unsafe("crc_win_y_start", 0644, dir, crtc, + &crc_win_y_start_fops); + debugfs_create_file_unsafe("crc_win_x_end", 0644, dir, crtc, + &crc_win_x_end_fops); + debugfs_create_file_unsafe("crc_win_y_end", 0644, dir, crtc, + &crc_win_y_end_fops); + debugfs_create_file_unsafe("crc_win_update", 0644, dir, crtc, + &crc_win_update_fops); + dput(dir); +#endif + debugfs_create_file("amdgpu_current_bpc", 0644, crtc->debugfs_entry, + crtc, &amdgpu_current_bpc_fops); + debugfs_create_file("amdgpu_current_colorspace", 0644, crtc->debugfs_entry, + crtc, &amdgpu_current_colorspace_fops); +} + +/* + * Writes DTN log state to the user supplied buffer. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log + */ +static ssize_t dtn_log_read( + struct file *f, + char __user *buf, + size_t size, + loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + struct dc *dc = adev->dm.dc; + struct dc_log_buffer_ctx log_ctx = { 0 }; + ssize_t result = 0; + + if (!buf || !size) + return -EINVAL; + + if (!dc->hwss.log_hw_state) + return 0; + + dc->hwss.log_hw_state(dc, &log_ctx); + + if (*pos < log_ctx.pos) { + size_t to_copy = log_ctx.pos - *pos; + + to_copy = min(to_copy, size); + + if (!copy_to_user(buf, log_ctx.buf + *pos, to_copy)) { + *pos += to_copy; + result = to_copy; + } + } + + kfree(log_ctx.buf); + + return result; +} + +/* + * Writes DTN log state to dmesg when triggered via a write. + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log + */ +static ssize_t dtn_log_write( + struct file *f, + const char __user *buf, + size_t size, + loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + struct dc *dc = adev->dm.dc; + + /* Write triggers log output via dmesg. */ + if (size == 0) + return 0; + + if (dc->hwss.log_hw_state) + dc->hwss.log_hw_state(dc, NULL); + + return size; +} + +static int mst_topo_show(struct seq_file *m, void *unused) +{ + struct amdgpu_device *adev = (struct amdgpu_device *)m->private; + struct drm_device *dev = adev_to_drm(adev); + struct drm_connector *connector; + struct drm_connector_list_iter conn_iter; + struct amdgpu_dm_connector *aconnector; + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort) + continue; + + aconnector = to_amdgpu_dm_connector(connector); + + /* Ensure we're only dumping the topology of a root mst node */ + if (!aconnector->mst_mgr.mst_state) + continue; + + seq_printf(m, "\nMST topology for connector %d\n", aconnector->connector_id); + drm_dp_mst_dump_topology(m, &aconnector->mst_mgr); + } + drm_connector_list_iter_end(&conn_iter); + + return 0; +} + +/* + * Sets trigger hpd for MST topologies. + * All connected connectors will be rediscovered and re started as needed if val of 1 is sent. + * All topologies will be disconnected if val of 0 is set . + * Usage to enable topologies: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst + * Usage to disable topologies: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst + */ +static int trigger_hpd_mst_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + struct drm_device *dev = adev_to_drm(adev); + struct drm_connector_list_iter iter; + struct amdgpu_dm_connector *aconnector; + struct drm_connector *connector; + struct dc_link *link = NULL; + + if (val == 1) { + drm_connector_list_iter_begin(dev, &iter); + drm_for_each_connector_iter(connector, &iter) { + aconnector = to_amdgpu_dm_connector(connector); + if (aconnector->dc_link->type == dc_connection_mst_branch && + aconnector->mst_mgr.aux) { + mutex_lock(&adev->dm.dc_lock); + dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD); + mutex_unlock(&adev->dm.dc_lock); + + drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_mgr, true); + } + } + } else if (val == 0) { + drm_connector_list_iter_begin(dev, &iter); + drm_for_each_connector_iter(connector, &iter) { + aconnector = to_amdgpu_dm_connector(connector); + if (!aconnector->dc_link) + continue; + + if (!aconnector->mst_root) + continue; + + link = aconnector->dc_link; + dc_link_dp_receiver_power_ctrl(link, false); + drm_dp_mst_topology_mgr_set_mst(&aconnector->mst_root->mst_mgr, false); + link->mst_stream_alloc_table.stream_count = 0; + memset(link->mst_stream_alloc_table.stream_allocations, 0, + sizeof(link->mst_stream_alloc_table.stream_allocations)); + } + } else { + return 0; + } + drm_kms_helper_hotplug_event(dev); + + return 0; +} + +/* + * The interface doesn't need get function, so it will return the + * value of zero + * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_trigger_hpd_mst + */ +static int trigger_hpd_mst_get(void *data, u64 *val) +{ + *val = 0; + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(trigger_hpd_mst_ops, trigger_hpd_mst_get, + trigger_hpd_mst_set, "%llu\n"); + + +/* + * Sets the force_timing_sync debug option from the given string. + * All connected displays will be force synchronized immediately. + * Usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync + */ +static int force_timing_sync_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.force_timing_sync = (bool)val; + + amdgpu_dm_trigger_timing_sync(adev_to_drm(adev)); + + return 0; +} + +/* + * Gets the force_timing_sync debug option value into the given buffer. + * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_force_timing_sync + */ +static int force_timing_sync_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.force_timing_sync; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(force_timing_sync_ops, force_timing_sync_get, + force_timing_sync_set, "%llu\n"); + + +/* + * Disables all HPD and HPD RX interrupt handling in the + * driver when set to 1. Default is 0. + */ +static int disable_hpd_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.disable_hpd_irq = (bool)val; + + return 0; +} + + +/* + * Returns 1 if HPD and HPRX interrupt handling is disabled, + * 0 otherwise. + */ +static int disable_hpd_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.disable_hpd_irq; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(disable_hpd_ops, disable_hpd_get, + disable_hpd_set, "%llu\n"); + +/* + * Temporary w/a to force sst sequence in M42D DP2 mst receiver + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_set_mst_en_for_sst + */ +static int dp_force_sst_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.dc->debug.set_mst_en_for_sst = val; + + return 0; +} + +static int dp_force_sst_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.set_mst_en_for_sst; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(dp_set_mst_en_for_sst_ops, dp_force_sst_get, + dp_force_sst_set, "%llu\n"); + +/* + * Force DP2 sequence without VESA certified cable. + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dp_ignore_cable_id + */ +static int dp_ignore_cable_id_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.dc->debug.ignore_cable_id = val; + + return 0; +} + +static int dp_ignore_cable_id_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.ignore_cable_id; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(dp_ignore_cable_id_ops, dp_ignore_cable_id_get, + dp_ignore_cable_id_set, "%llu\n"); + +/* + * Sets the DC visual confirm debug option from the given string. + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_visual_confirm + */ +static int visual_confirm_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + adev->dm.dc->debug.visual_confirm = (enum visual_confirm)val; + + return 0; +} + +/* + * Reads the DC visual confirm debug option value into the given buffer. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_visual_confirm + */ +static int visual_confirm_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.visual_confirm; + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(mst_topo); +DEFINE_DEBUGFS_ATTRIBUTE(visual_confirm_fops, visual_confirm_get, + visual_confirm_set, "%llu\n"); + + +/* + * Sets the DC skip_detection_link_training debug option from the given string. + * Example usage: echo 1 > /sys/kernel/debug/dri/0/amdgpu_skip_detection_link_training + */ +static int skip_detection_link_training_set(void *data, u64 val) +{ + struct amdgpu_device *adev = data; + + if (val == 0) + adev->dm.dc->debug.skip_detection_link_training = false; + else + adev->dm.dc->debug.skip_detection_link_training = true; + + return 0; +} + +/* + * Reads the DC skip_detection_link_training debug option value into the given buffer. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_skip_detection_link_training + */ +static int skip_detection_link_training_get(void *data, u64 *val) +{ + struct amdgpu_device *adev = data; + + *val = adev->dm.dc->debug.skip_detection_link_training; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(skip_detection_link_training_fops, + skip_detection_link_training_get, + skip_detection_link_training_set, "%llu\n"); + +/* + * Dumps the DCC_EN bit for each pipe. + * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dcc_en + */ +static ssize_t dcc_en_bits_read( + struct file *f, + char __user *buf, + size_t size, + loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + struct dc *dc = adev->dm.dc; + char *rd_buf = NULL; + const uint32_t rd_buf_size = 32; + uint32_t result = 0; + int offset = 0; + int num_pipes = dc->res_pool->pipe_count; + int *dcc_en_bits; + int i, r; + + dcc_en_bits = kcalloc(num_pipes, sizeof(int), GFP_KERNEL); + if (!dcc_en_bits) + return -ENOMEM; + + if (!dc->hwss.get_dcc_en_bits) { + kfree(dcc_en_bits); + return 0; + } + + dc->hwss.get_dcc_en_bits(dc, dcc_en_bits); + + rd_buf = kcalloc(rd_buf_size, sizeof(char), GFP_KERNEL); + if (!rd_buf) { + kfree(dcc_en_bits); + return -ENOMEM; + } + + for (i = 0; i < num_pipes; i++) + offset += snprintf(rd_buf + offset, rd_buf_size - offset, + "%d ", dcc_en_bits[i]); + rd_buf[strlen(rd_buf)] = '\n'; + + kfree(dcc_en_bits); + + while (size) { + if (*pos >= rd_buf_size) + break; + r = put_user(*(rd_buf + result), buf); + if (r) { + kfree(rd_buf); + return r; /* r = -EFAULT */ + } + buf += 1; + size -= 1; + *pos += 1; + result += 1; + } + + kfree(rd_buf); + return result; +} + +void dtn_debugfs_init(struct amdgpu_device *adev) +{ + static const struct file_operations dtn_log_fops = { + .owner = THIS_MODULE, + .read = dtn_log_read, + .write = dtn_log_write, + .llseek = default_llseek + }; + static const struct file_operations dcc_en_bits_fops = { + .owner = THIS_MODULE, + .read = dcc_en_bits_read, + .llseek = default_llseek + }; + + struct drm_minor *minor = adev_to_drm(adev)->primary; + struct dentry *root = minor->debugfs_root; + + debugfs_create_file("amdgpu_mst_topology", 0444, root, + adev, &mst_topo_fops); + debugfs_create_file("amdgpu_dm_dtn_log", 0644, root, adev, + &dtn_log_fops); + debugfs_create_file("amdgpu_dm_dp_set_mst_en_for_sst", 0644, root, adev, + &dp_set_mst_en_for_sst_ops); + debugfs_create_file("amdgpu_dm_dp_ignore_cable_id", 0644, root, adev, + &dp_ignore_cable_id_ops); + + debugfs_create_file_unsafe("amdgpu_dm_visual_confirm", 0644, root, adev, + &visual_confirm_fops); + + debugfs_create_file_unsafe("amdgpu_dm_skip_detection_link_training", 0644, root, adev, + &skip_detection_link_training_fops); + + debugfs_create_file_unsafe("amdgpu_dm_dmub_tracebuffer", 0644, root, + adev, &dmub_tracebuffer_fops); + + debugfs_create_file_unsafe("amdgpu_dm_dmub_fw_state", 0644, root, + adev, &dmub_fw_state_fops); + + debugfs_create_file_unsafe("amdgpu_dm_force_timing_sync", 0644, root, + adev, &force_timing_sync_ops); + + debugfs_create_file_unsafe("amdgpu_dm_dmcub_trace_event_en", 0644, root, + adev, &dmcub_trace_event_state_fops); + + debugfs_create_file_unsafe("amdgpu_dm_trigger_hpd_mst", 0644, root, + adev, &trigger_hpd_mst_ops); + + debugfs_create_file_unsafe("amdgpu_dm_dcc_en", 0644, root, adev, + &dcc_en_bits_fops); + + debugfs_create_file_unsafe("amdgpu_dm_disable_hpd", 0644, root, adev, + &disable_hpd_ops); + +} |