1 files changed, 300 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
new file mode 100644
index 000000000..5e35033ba
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_debug.c
@@ -0,0 +1,300 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
+ */
+
+#define pr_fmt(fmt)"[drm-dp] %s: " fmt, __func__
+
+#include <linux/debugfs.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_file.h>
+
+#include "dp_parser.h"
+#include "dp_catalog.h"
+#include "dp_aux.h"
+#include "dp_ctrl.h"
+#include "dp_debug.h"
+#include "dp_display.h"
+
+#define DEBUG_NAME "msm_dp"
+
+struct dp_debug_private {
+	struct dentry *root;
+
+	struct dp_usbpd *usbpd;
+	struct dp_link *link;
+	struct dp_panel *panel;
+	struct drm_connector *connector;
+	struct device *dev;
+	struct drm_device *drm_dev;
+
+	struct dp_debug dp_debug;
+};
+
+static int dp_debug_show(struct seq_file *seq, void *p)
+{
+	struct dp_debug_private *debug = seq->private;
+	u64 lclk = 0;
+	u32 link_params_rate;
+	const struct drm_display_mode *drm_mode;
+
+	if (!debug)
+		return -ENODEV;
+
+	drm_mode = &debug->panel->dp_mode.drm_mode;
+
+	seq_printf(seq, "\tname = %s\n", DEBUG_NAME);
+	seq_printf(seq, "\tdrm_dp_link\n\t\trate = %u\n",
+			debug->panel->link_info.rate);
+	seq_printf(seq, "\t\tnum_lanes = %u\n",
+			debug->panel->link_info.num_lanes);
+	seq_printf(seq, "\t\tcapabilities = %lu\n",
+			debug->panel->link_info.capabilities);
+	seq_printf(seq, "\tdp_panel_info:\n\t\tactive = %dx%d\n",
+			drm_mode->hdisplay,
+			drm_mode->vdisplay);
+	seq_printf(seq, "\t\tback_porch = %dx%d\n",
+			drm_mode->htotal - drm_mode->hsync_end,
+			drm_mode->vtotal - drm_mode->vsync_end);
+	seq_printf(seq, "\t\tfront_porch = %dx%d\n",
+			drm_mode->hsync_start - drm_mode->hdisplay,
+			drm_mode->vsync_start - drm_mode->vdisplay);
+	seq_printf(seq, "\t\tsync_width = %dx%d\n",
+			drm_mode->hsync_end - drm_mode->hsync_start,
+			drm_mode->vsync_end - drm_mode->vsync_start);
+	seq_printf(seq, "\t\tactive_low = %dx%d\n",
+			debug->panel->dp_mode.h_active_low,
+			debug->panel->dp_mode.v_active_low);
+	seq_printf(seq, "\t\th_skew = %d\n",
+			drm_mode->hskew);
+	seq_printf(seq, "\t\trefresh rate = %d\n",
+			drm_mode_vrefresh(drm_mode));
+	seq_printf(seq, "\t\tpixel clock khz = %d\n",
+			drm_mode->clock);
+	seq_printf(seq, "\t\tbpp = %d\n",
+			debug->panel->dp_mode.bpp);
+
+	/* Link Information */
+	seq_printf(seq, "\tdp_link:\n\t\ttest_requested = %d\n",
+			debug->link->sink_request);
+	seq_printf(seq, "\t\tnum_lanes = %d\n",
+			debug->link->link_params.num_lanes);
+	link_params_rate = debug->link->link_params.rate;
+	seq_printf(seq, "\t\tbw_code = %d\n",
+			drm_dp_link_rate_to_bw_code(link_params_rate));
+	lclk = debug->link->link_params.rate * 1000;
+	seq_printf(seq, "\t\tlclk = %lld\n", lclk);
+	seq_printf(seq, "\t\tv_level = %d\n",
+			debug->link->phy_params.v_level);
+	seq_printf(seq, "\t\tp_level = %d\n",
+			debug->link->phy_params.p_level);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(dp_debug);
+
+static int dp_test_data_show(struct seq_file *m, void *data)
+{
+	const struct dp_debug_private *debug = m->private;
+	const struct drm_connector *connector = debug->connector;
+	u32 bpc;
+
+	if (connector->status == connector_status_connected) {
+		bpc = debug->link->test_video.test_bit_depth;
+		seq_printf(m, "hdisplay: %d\n",
+				debug->link->test_video.test_h_width);
+		seq_printf(m, "vdisplay: %d\n",
+				debug->link->test_video.test_v_height);
+		seq_printf(m, "bpc: %u\n",
+				dp_link_bit_depth_to_bpc(bpc));
+	} else {
+		seq_puts(m, "0");
+	}
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(dp_test_data);
+
+static int dp_test_type_show(struct seq_file *m, void *data)
+{
+	const struct dp_debug_private *debug = m->private;
+	const struct drm_connector *connector = debug->connector;
+
+	if (connector->status == connector_status_connected)
+		seq_printf(m, "%02x", DP_TEST_LINK_VIDEO_PATTERN);
+	else
+		seq_puts(m, "0");
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(dp_test_type);
+
+static ssize_t dp_test_active_write(struct file *file,
+		const char __user *ubuf,
+		size_t len, loff_t *offp)
+{
+	char *input_buffer;
+	int status = 0;
+	const struct dp_debug_private *debug;
+	const struct drm_connector *connector;
+	int val = 0;
+
+	debug = ((struct seq_file *)file->private_data)->private;
+	connector = debug->connector;
+
+	if (len == 0)
+		return 0;
+
+	input_buffer = memdup_user_nul(ubuf, len);
+	if (IS_ERR(input_buffer))
+		return PTR_ERR(input_buffer);
+
+	DRM_DEBUG_DRIVER("Copied %d bytes from user\n", (unsigned int)len);
+
+	if (connector->status == connector_status_connected) {
+		status = kstrtoint(input_buffer, 10, &val);
+		if (status < 0) {
+			kfree(input_buffer);
+			return status;
+		}
+		DRM_DEBUG_DRIVER("Got %d for test active\n", val);
+		/* To prevent erroneous activation of the compliance
+		 * testing code, only accept an actual value of 1 here
+		 */
+		if (val == 1)
+			debug->panel->video_test = true;
+		else
+			debug->panel->video_test = false;
+	}
+	kfree(input_buffer);
+
+	*offp += len;
+	return len;
+}
+
+static int dp_test_active_show(struct seq_file *m, void *data)
+{
+	struct dp_debug_private *debug = m->private;
+	struct drm_connector *connector = debug->connector;
+
+	if (connector->status == connector_status_connected) {
+		if (debug->panel->video_test)
+			seq_puts(m, "1");
+		else
+			seq_puts(m, "0");
+	} else {
+		seq_puts(m, "0");
+	}
+
+	return 0;
+}
+
+static int dp_test_active_open(struct inode *inode,
+		struct file *file)
+{
+	return single_open(file, dp_test_active_show,
+			inode->i_private);
+}
+
+static const struct file_operations test_active_fops = {
+	.owner = THIS_MODULE,
+	.open = dp_test_active_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+	.write = dp_test_active_write
+};
+
+static void dp_debug_init(struct dp_debug *dp_debug, struct drm_minor *minor)
+{
+	char path[64];
+	struct dp_debug_private *debug = container_of(dp_debug,
+			struct dp_debug_private, dp_debug);
+
+	snprintf(path, sizeof(path), "msm_dp-%s", debug->connector->name);
+
+	debug->root = debugfs_create_dir(path, minor->debugfs_root);
+
+	debugfs_create_file("dp_debug", 0444, debug->root,
+			debug, &dp_debug_fops);
+
+	debugfs_create_file("msm_dp_test_active", 0444,
+			debug->root,
+			debug, &test_active_fops);
+
+	debugfs_create_file("msm_dp_test_data", 0444,
+			debug->root,
+			debug, &dp_test_data_fops);
+
+	debugfs_create_file("msm_dp_test_type", 0444,
+			debug->root,
+			debug, &dp_test_type_fops);
+}
+
+struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
+		struct dp_usbpd *usbpd, struct dp_link *link,
+		struct drm_connector *connector, struct drm_minor *minor)
+{
+	struct dp_debug_private *debug;
+	struct dp_debug *dp_debug;
+	int rc;
+
+	if (!dev || !panel || !usbpd || !link) {
+		DRM_ERROR("invalid input\n");
+		rc = -EINVAL;
+		goto error;
+	}
+
+	debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
+	if (!debug) {
+		rc = -ENOMEM;
+		goto error;
+	}
+
+	debug->dp_debug.debug_en = false;
+	debug->usbpd = usbpd;
+	debug->link = link;
+	debug->panel = panel;
+	debug->dev = dev;
+	debug->drm_dev = minor->dev;
+	debug->connector = connector;
+
+	dp_debug = &debug->dp_debug;
+	dp_debug->vdisplay = 0;
+	dp_debug->hdisplay = 0;
+	dp_debug->vrefresh = 0;
+
+	dp_debug_init(dp_debug, minor);
+
+	return dp_debug;
+ error:
+	return ERR_PTR(rc);
+}
+
+static int dp_debug_deinit(struct dp_debug *dp_debug)
+{
+	struct dp_debug_private *debug;
+
+	if (!dp_debug)
+		return -EINVAL;
+
+	debug = container_of(dp_debug, struct dp_debug_private, dp_debug);
+
+	debugfs_remove_recursive(debug->root);
+
+	return 0;
+}
+
+void dp_debug_put(struct dp_debug *dp_debug)
+{
+	struct dp_debug_private *debug;
+
+	if (!dp_debug)
+		return;
+
+	debug = container_of(dp_debug, struct dp_debug_private, dp_debug);
+
+	dp_debug_deinit(dp_debug);
+
+	devm_kfree(debug->dev, debug);
+}