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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/bridge/lontium-lt9611uxc.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/bridge/lontium-lt9611uxc.c')
-rw-r--r--drivers/gpu/drm/bridge/lontium-lt9611uxc.c1024
1 files changed, 1024 insertions, 0 deletions
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
new file mode 100644
index 000000000..818848b2c
--- /dev/null
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -0,0 +1,1024 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2019-2020. Linaro Limited.
+ */
+
+#include <linux/firmware.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+
+#include <sound/hdmi-codec.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_print.h>
+#include <drm/drm_probe_helper.h>
+
+#define EDID_BLOCK_SIZE 128
+#define EDID_NUM_BLOCKS 2
+
+struct lt9611uxc {
+ struct device *dev;
+ struct drm_bridge bridge;
+ struct drm_connector connector;
+
+ struct regmap *regmap;
+ /* Protects all accesses to registers by stopping the on-chip MCU */
+ struct mutex ocm_lock;
+
+ struct wait_queue_head wq;
+ struct work_struct work;
+
+ struct device_node *dsi0_node;
+ struct device_node *dsi1_node;
+ struct mipi_dsi_device *dsi0;
+ struct mipi_dsi_device *dsi1;
+ struct platform_device *audio_pdev;
+
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *enable_gpio;
+
+ struct regulator_bulk_data supplies[2];
+
+ struct i2c_client *client;
+
+ bool hpd_supported;
+ bool edid_read;
+ /* can be accessed from different threads, so protect this with ocm_lock */
+ bool hdmi_connected;
+ uint8_t fw_version;
+};
+
+#define LT9611_PAGE_CONTROL 0xff
+
+static const struct regmap_range_cfg lt9611uxc_ranges[] = {
+ {
+ .name = "register_range",
+ .range_min = 0,
+ .range_max = 0xd0ff,
+ .selector_reg = LT9611_PAGE_CONTROL,
+ .selector_mask = 0xff,
+ .selector_shift = 0,
+ .window_start = 0,
+ .window_len = 0x100,
+ },
+};
+
+static const struct regmap_config lt9611uxc_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xffff,
+ .ranges = lt9611uxc_ranges,
+ .num_ranges = ARRAY_SIZE(lt9611uxc_ranges),
+};
+
+struct lt9611uxc_mode {
+ u16 hdisplay;
+ u16 vdisplay;
+ u8 vrefresh;
+};
+
+/*
+ * This chip supports only a fixed set of modes.
+ * Enumerate them here to check whether the mode is supported.
+ */
+static struct lt9611uxc_mode lt9611uxc_modes[] = {
+ { 1920, 1080, 60 },
+ { 1920, 1080, 30 },
+ { 1920, 1080, 25 },
+ { 1366, 768, 60 },
+ { 1360, 768, 60 },
+ { 1280, 1024, 60 },
+ { 1280, 800, 60 },
+ { 1280, 720, 60 },
+ { 1280, 720, 50 },
+ { 1280, 720, 30 },
+ { 1152, 864, 60 },
+ { 1024, 768, 60 },
+ { 800, 600, 60 },
+ { 720, 576, 50 },
+ { 720, 480, 60 },
+ { 640, 480, 60 },
+};
+
+static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct lt9611uxc, bridge);
+}
+
+static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector)
+{
+ return container_of(connector, struct lt9611uxc, connector);
+}
+
+static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc)
+{
+ mutex_lock(&lt9611uxc->ocm_lock);
+ regmap_write(lt9611uxc->regmap, 0x80ee, 0x01);
+}
+
+static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc)
+{
+ regmap_write(lt9611uxc->regmap, 0x80ee, 0x00);
+ msleep(50);
+ mutex_unlock(&lt9611uxc->ocm_lock);
+}
+
+static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id)
+{
+ struct lt9611uxc *lt9611uxc = dev_id;
+ unsigned int irq_status = 0;
+ unsigned int hpd_status = 0;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ regmap_read(lt9611uxc->regmap, 0xb022, &irq_status);
+ regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status);
+ if (irq_status)
+ regmap_write(lt9611uxc->regmap, 0xb022, 0);
+
+ if (irq_status & BIT(0)) {
+ lt9611uxc->edid_read = !!(hpd_status & BIT(0));
+ wake_up_all(&lt9611uxc->wq);
+ }
+
+ if (irq_status & BIT(1)) {
+ lt9611uxc->hdmi_connected = hpd_status & BIT(1);
+ schedule_work(&lt9611uxc->work);
+ }
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return IRQ_HANDLED;
+}
+
+static void lt9611uxc_hpd_work(struct work_struct *work)
+{
+ struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
+ bool connected;
+
+ if (lt9611uxc->connector.dev) {
+ if (lt9611uxc->connector.dev->mode_config.funcs)
+ drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
+ } else {
+
+ mutex_lock(&lt9611uxc->ocm_lock);
+ connected = lt9611uxc->hdmi_connected;
+ mutex_unlock(&lt9611uxc->ocm_lock);
+
+ drm_bridge_hpd_notify(&lt9611uxc->bridge,
+ connected ?
+ connector_status_connected :
+ connector_status_disconnected);
+ }
+}
+
+static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc)
+{
+ gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
+ msleep(20);
+
+ gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0);
+ msleep(20);
+
+ gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
+ msleep(300);
+}
+
+static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc)
+{
+ if (!lt9611uxc->enable_gpio)
+ return;
+
+ gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1);
+ msleep(20);
+}
+
+static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+
+ lt9611uxc->supplies[0].supply = "vdd";
+ lt9611uxc->supplies[1].supply = "vcc";
+
+ ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies);
+ if (ret < 0)
+ return ret;
+
+ return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000);
+}
+
+static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+
+ ret = regulator_enable(lt9611uxc->supplies[0].consumer);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(1000, 10000); /* 50000 according to dtsi */
+
+ ret = regulator_enable(lt9611uxc->supplies[1].consumer);
+ if (ret < 0) {
+ regulator_disable(lt9611uxc->supplies[0].consumer);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) {
+ if (lt9611uxc_modes[i].hdisplay == mode->hdisplay &&
+ lt9611uxc_modes[i].vdisplay == mode->vdisplay &&
+ lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
+ return &lt9611uxc_modes[i];
+ }
+ }
+
+ return NULL;
+}
+
+static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc,
+ struct device_node *dsi_node)
+{
+ const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL };
+ struct mipi_dsi_device *dsi;
+ struct mipi_dsi_host *host;
+ struct device *dev = lt9611uxc->dev;
+ int ret;
+
+ host = of_find_mipi_dsi_host_by_node(dsi_node);
+ if (!host) {
+ dev_err(dev, "failed to find dsi host\n");
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
+ if (IS_ERR(dsi)) {
+ dev_err(dev, "failed to create dsi device\n");
+ return dsi;
+ }
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+ MIPI_DSI_MODE_VIDEO_HSE;
+
+ ret = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach dsi to host\n");
+ return ERR_PTR(ret);
+ }
+
+ return dsi;
+}
+
+static int lt9611uxc_connector_get_modes(struct drm_connector *connector)
+{
+ struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
+ unsigned int count;
+ struct edid *edid;
+
+ edid = lt9611uxc->bridge.funcs->get_edid(&lt9611uxc->bridge, connector);
+ drm_connector_update_edid_property(connector, edid);
+ count = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return count;
+}
+
+static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector,
+ bool force)
+{
+ struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
+
+ return lt9611uxc->bridge.funcs->detect(&lt9611uxc->bridge);
+}
+
+static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode);
+
+ return lt9611uxc_mode ? MODE_OK : MODE_BAD;
+}
+
+static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = {
+ .get_modes = lt9611uxc_connector_get_modes,
+ .mode_valid = lt9611uxc_connector_mode_valid,
+};
+
+static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = lt9611uxc_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+
+ if (!bridge->encoder) {
+ DRM_ERROR("Parent encoder object not found");
+ return -ENODEV;
+ }
+
+ lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_helper_add(&lt9611uxc->connector,
+ &lt9611uxc_bridge_connector_helper_funcs);
+ ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,
+ &lt9611uxc_bridge_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret) {
+ DRM_ERROR("Failed to initialize connector with drm\n");
+ return ret;
+ }
+
+ return drm_connector_attach_encoder(&lt9611uxc->connector, bridge->encoder);
+}
+
+static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+ int ret;
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
+ ret = lt9611uxc_connector_init(bridge, lt9611uxc);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static enum drm_mode_status
+lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct lt9611uxc_mode *lt9611uxc_mode;
+
+ lt9611uxc_mode = lt9611uxc_find_mode(mode);
+
+ return lt9611uxc_mode ? MODE_OK : MODE_BAD;
+}
+
+static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc,
+ const struct drm_display_mode *mode)
+{
+ u32 h_total, hactive, hsync_len, hfront_porch;
+ u32 v_total, vactive, vsync_len, vfront_porch;
+
+ h_total = mode->htotal;
+ v_total = mode->vtotal;
+
+ hactive = mode->hdisplay;
+ hsync_len = mode->hsync_end - mode->hsync_start;
+ hfront_porch = mode->hsync_start - mode->hdisplay;
+
+ vactive = mode->vdisplay;
+ vsync_len = mode->vsync_end - mode->vsync_start;
+ vfront_porch = mode->vsync_start - mode->vdisplay;
+
+ regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256));
+ regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256));
+ regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256));
+ regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256));
+ regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256));
+
+ regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256));
+
+ regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256));
+ regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256));
+
+ regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256));
+ regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256));
+
+ regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256));
+ regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256));
+}
+
+static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adj_mode)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+
+ lt9611uxc_lock(lt9611uxc);
+ lt9611uxc_video_setup(lt9611uxc, mode);
+ lt9611uxc_unlock(lt9611uxc);
+}
+
+static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+ unsigned int reg_val = 0;
+ int ret;
+ bool connected = true;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ if (lt9611uxc->hpd_supported) {
+ ret = regmap_read(lt9611uxc->regmap, 0xb023, &reg_val);
+
+ if (ret)
+ dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret);
+ else
+ connected = reg_val & BIT(1);
+ }
+ lt9611uxc->hdmi_connected = connected;
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return connected ? connector_status_connected :
+ connector_status_disconnected;
+}
+
+static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
+{
+ return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
+ msecs_to_jiffies(500));
+}
+
+static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
+{
+ struct lt9611uxc *lt9611uxc = data;
+ int ret;
+
+ if (len > EDID_BLOCK_SIZE)
+ return -EINVAL;
+
+ if (block >= EDID_NUM_BLOCKS)
+ return -EINVAL;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ regmap_write(lt9611uxc->regmap, 0xb00b, 0x10);
+
+ regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE);
+
+ ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len);
+ if (ret)
+ dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret);
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return 0;
+};
+
+static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge,
+ struct drm_connector *connector)
+{
+ struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
+ int ret;
+
+ ret = lt9611uxc_wait_for_edid(lt9611uxc);
+ if (ret < 0) {
+ dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret);
+ return NULL;
+ } else if (ret == 0) {
+ dev_err(lt9611uxc->dev, "wait for EDID timeout\n");
+ return NULL;
+ }
+
+ return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc);
+}
+
+static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
+ .attach = lt9611uxc_bridge_attach,
+ .mode_valid = lt9611uxc_bridge_mode_valid,
+ .mode_set = lt9611uxc_bridge_mode_set,
+ .detect = lt9611uxc_bridge_detect,
+ .get_edid = lt9611uxc_bridge_get_edid,
+};
+
+static int lt9611uxc_parse_dt(struct device *dev,
+ struct lt9611uxc *lt9611uxc)
+{
+ lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
+ if (!lt9611uxc->dsi0_node) {
+ dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n");
+ return -ENODEV;
+ }
+
+ lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
+
+ return 0;
+}
+
+static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc)
+{
+ struct device *dev = lt9611uxc->dev;
+
+ lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(lt9611uxc->reset_gpio)) {
+ dev_err(dev, "failed to acquire reset gpio\n");
+ return PTR_ERR(lt9611uxc->reset_gpio);
+ }
+
+ lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
+ if (IS_ERR(lt9611uxc->enable_gpio)) {
+ dev_err(dev, "failed to acquire enable gpio\n");
+ return PTR_ERR(lt9611uxc->enable_gpio);
+ }
+
+ return 0;
+}
+
+static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc)
+{
+ unsigned int rev0, rev1, rev2;
+ int ret;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0);
+ ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1);
+ ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2);
+ if (ret)
+ dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
+ else
+ dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2);
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return ret;
+}
+
+static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc)
+{
+ unsigned int rev;
+ int ret;
+
+ lt9611uxc_lock(lt9611uxc);
+
+ ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev);
+ if (ret)
+ dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
+ else
+ dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev);
+
+ lt9611uxc_unlock(lt9611uxc);
+
+ return ret < 0 ? ret : rev;
+}
+
+static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *fmt,
+ struct hdmi_codec_params *hparms)
+{
+ /*
+ * LT9611UXC will automatically detect rate and sample size, so no need
+ * to setup anything here.
+ */
+ return 0;
+}
+
+static void lt9611uxc_audio_shutdown(struct device *dev, void *data)
+{
+}
+
+static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
+ struct device_node *endpoint)
+{
+ struct of_endpoint of_ep;
+ int ret;
+
+ ret = of_graph_parse_endpoint(endpoint, &of_ep);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * HDMI sound should be located as reg = <2>
+ * Then, it is sound port 0
+ */
+ if (of_ep.port == 2)
+ return 0;
+
+ return -EINVAL;
+}
+
+static const struct hdmi_codec_ops lt9611uxc_codec_ops = {
+ .hw_params = lt9611uxc_hdmi_hw_params,
+ .audio_shutdown = lt9611uxc_audio_shutdown,
+ .get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id,
+};
+
+static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc)
+{
+ struct hdmi_codec_pdata codec_data = {
+ .ops = &lt9611uxc_codec_ops,
+ .max_i2s_channels = 2,
+ .i2s = 1,
+ .data = lt9611uxc,
+ };
+
+ lt9611uxc->audio_pdev =
+ platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &codec_data, sizeof(codec_data));
+
+ return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev);
+}
+
+static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc)
+{
+ if (lt9611uxc->audio_pdev) {
+ platform_device_unregister(lt9611uxc->audio_pdev);
+ lt9611uxc->audio_pdev = NULL;
+ }
+}
+
+#define LT9611UXC_FW_PAGE_SIZE 32
+static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf)
+{
+ struct reg_sequence seq_write_prepare[] = {
+ REG_SEQ0(0x805a, 0x04),
+ REG_SEQ0(0x805a, 0x00),
+
+ REG_SEQ0(0x805e, 0xdf),
+ REG_SEQ0(0x805a, 0x20),
+ REG_SEQ0(0x805a, 0x00),
+ REG_SEQ0(0x8058, 0x21),
+ };
+
+ struct reg_sequence seq_write_addr[] = {
+ REG_SEQ0(0x805b, (addr >> 16) & 0xff),
+ REG_SEQ0(0x805c, (addr >> 8) & 0xff),
+ REG_SEQ0(0x805d, addr & 0xff),
+ REG_SEQ0(0x805a, 0x10),
+ REG_SEQ0(0x805a, 0x00),
+ };
+
+ regmap_write(lt9611uxc->regmap, 0x8108, 0xbf);
+ msleep(20);
+ regmap_write(lt9611uxc->regmap, 0x8108, 0xff);
+ msleep(20);
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare));
+ regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE);
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr));
+ msleep(20);
+}
+
+static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf)
+{
+ struct reg_sequence seq_read_page[] = {
+ REG_SEQ0(0x805a, 0xa0),
+ REG_SEQ0(0x805a, 0x80),
+ REG_SEQ0(0x805b, (addr >> 16) & 0xff),
+ REG_SEQ0(0x805c, (addr >> 8) & 0xff),
+ REG_SEQ0(0x805d, addr & 0xff),
+ REG_SEQ0(0x805a, 0x90),
+ REG_SEQ0(0x805a, 0x80),
+ REG_SEQ0(0x8058, 0x21),
+ };
+
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page));
+ regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE);
+}
+
+static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size)
+{
+ struct reg_sequence seq_read_setup[] = {
+ REG_SEQ0(0x805a, 0x84),
+ REG_SEQ0(0x805a, 0x80),
+ };
+
+ char *readbuf;
+ u16 offset;
+
+ readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL);
+ if (!readbuf)
+ return NULL;
+
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup));
+
+ for (offset = 0;
+ offset < size;
+ offset += LT9611UXC_FW_PAGE_SIZE)
+ lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]);
+
+ return readbuf;
+}
+
+static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc)
+{
+ int ret;
+ u16 offset;
+ size_t remain;
+ char *readbuf;
+ const struct firmware *fw;
+
+ struct reg_sequence seq_setup[] = {
+ REG_SEQ0(0x805e, 0xdf),
+ REG_SEQ0(0x8058, 0x00),
+ REG_SEQ0(0x8059, 0x50),
+ REG_SEQ0(0x805a, 0x10),
+ REG_SEQ0(0x805a, 0x00),
+ };
+
+
+ struct reg_sequence seq_block_erase[] = {
+ REG_SEQ0(0x805a, 0x04),
+ REG_SEQ0(0x805a, 0x00),
+ REG_SEQ0(0x805b, 0x00),
+ REG_SEQ0(0x805c, 0x00),
+ REG_SEQ0(0x805d, 0x00),
+ REG_SEQ0(0x805a, 0x01),
+ REG_SEQ0(0x805a, 0x00),
+ };
+
+ ret = request_firmware(&fw, "lt9611uxc_fw.bin", lt9611uxc->dev);
+ if (ret < 0)
+ return ret;
+
+ dev_info(lt9611uxc->dev, "Updating firmware\n");
+ lt9611uxc_lock(lt9611uxc);
+
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup));
+
+ /*
+ * Need erase block 2 timess here. Sometimes, block erase can fail.
+ * This is a workaroud.
+ */
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
+ msleep(3000);
+ regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
+ msleep(3000);
+
+ for (offset = 0, remain = fw->size;
+ remain >= LT9611UXC_FW_PAGE_SIZE;
+ offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE)
+ lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset);
+
+ if (remain > 0) {
+ char buf[LT9611UXC_FW_PAGE_SIZE];
+
+ memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE);
+ memcpy(buf, fw->data + offset, remain);
+ lt9611uxc_firmware_write_page(lt9611uxc, offset, buf);
+ }
+ msleep(20);
+
+ readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size);
+ if (!readbuf) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (!memcmp(readbuf, fw->data, fw->size)) {
+ dev_err(lt9611uxc->dev, "Firmware update failed\n");
+ print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false);
+ ret = -EINVAL;
+ } else {
+ dev_info(lt9611uxc->dev, "Firmware updates successfully\n");
+ ret = 0;
+ }
+ kfree(readbuf);
+
+out:
+ lt9611uxc_unlock(lt9611uxc);
+ lt9611uxc_reset(lt9611uxc);
+ release_firmware(fw);
+
+ return ret;
+}
+
+static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = lt9611uxc_firmware_update(lt9611uxc);
+ if (ret < 0)
+ return ret;
+ return len;
+}
+
+static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
+
+ return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version);
+}
+
+static DEVICE_ATTR_RW(lt9611uxc_firmware);
+
+static struct attribute *lt9611uxc_attrs[] = {
+ &dev_attr_lt9611uxc_firmware.attr,
+ NULL,
+};
+
+static const struct attribute_group lt9611uxc_attr_group = {
+ .attrs = lt9611uxc_attrs,
+};
+
+static const struct attribute_group *lt9611uxc_attr_groups[] = {
+ &lt9611uxc_attr_group,
+ NULL,
+};
+
+static int lt9611uxc_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lt9611uxc *lt9611uxc;
+ struct device *dev = &client->dev;
+ int ret;
+ bool fw_updated = false;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(dev, "device doesn't support I2C\n");
+ return -ENODEV;
+ }
+
+ lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL);
+ if (!lt9611uxc)
+ return -ENOMEM;
+
+ lt9611uxc->dev = dev;
+ lt9611uxc->client = client;
+ mutex_init(&lt9611uxc->ocm_lock);
+
+ lt9611uxc->regmap = devm_regmap_init_i2c(client, &lt9611uxc_regmap_config);
+ if (IS_ERR(lt9611uxc->regmap)) {
+ dev_err(lt9611uxc->dev, "regmap i2c init failed\n");
+ return PTR_ERR(lt9611uxc->regmap);
+ }
+
+ ret = lt9611uxc_parse_dt(dev, lt9611uxc);
+ if (ret) {
+ dev_err(dev, "failed to parse device tree\n");
+ return ret;
+ }
+
+ ret = lt9611uxc_gpio_init(lt9611uxc);
+ if (ret < 0)
+ goto err_of_put;
+
+ ret = lt9611uxc_regulator_init(lt9611uxc);
+ if (ret < 0)
+ goto err_of_put;
+
+ lt9611uxc_assert_5v(lt9611uxc);
+
+ ret = lt9611uxc_regulator_enable(lt9611uxc);
+ if (ret)
+ goto err_of_put;
+
+ lt9611uxc_reset(lt9611uxc);
+
+ ret = lt9611uxc_read_device_rev(lt9611uxc);
+ if (ret) {
+ dev_err(dev, "failed to read chip rev\n");
+ goto err_disable_regulators;
+ }
+
+retry:
+ ret = lt9611uxc_read_version(lt9611uxc);
+ if (ret < 0) {
+ dev_err(dev, "failed to read FW version\n");
+ goto err_disable_regulators;
+ } else if (ret == 0) {
+ if (!fw_updated) {
+ fw_updated = true;
+ dev_err(dev, "FW version 0, enforcing firmware update\n");
+ ret = lt9611uxc_firmware_update(lt9611uxc);
+ if (ret < 0)
+ goto err_disable_regulators;
+ else
+ goto retry;
+ } else {
+ dev_err(dev, "FW version 0, update failed\n");
+ ret = -EOPNOTSUPP;
+ goto err_disable_regulators;
+ }
+ } else if (ret < 0x40) {
+ dev_info(dev, "FW version 0x%x, HPD not supported\n", ret);
+ } else {
+ lt9611uxc->hpd_supported = true;
+ }
+ lt9611uxc->fw_version = ret;
+
+ init_waitqueue_head(&lt9611uxc->wq);
+ INIT_WORK(&lt9611uxc->work, lt9611uxc_hpd_work);
+
+ ret = request_threaded_irq(client->irq, NULL,
+ lt9611uxc_irq_thread_handler,
+ IRQF_ONESHOT, "lt9611uxc", lt9611uxc);
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ goto err_disable_regulators;
+ }
+
+ i2c_set_clientdata(client, lt9611uxc);
+
+ lt9611uxc->bridge.funcs = &lt9611uxc_bridge_funcs;
+ lt9611uxc->bridge.of_node = client->dev.of_node;
+ lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
+ if (lt9611uxc->hpd_supported)
+ lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD;
+ lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
+
+ drm_bridge_add(&lt9611uxc->bridge);
+
+ /* Attach primary DSI */
+ lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node);
+ if (IS_ERR(lt9611uxc->dsi0)) {
+ ret = PTR_ERR(lt9611uxc->dsi0);
+ goto err_remove_bridge;
+ }
+
+ /* Attach secondary DSI, if specified */
+ if (lt9611uxc->dsi1_node) {
+ lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node);
+ if (IS_ERR(lt9611uxc->dsi1)) {
+ ret = PTR_ERR(lt9611uxc->dsi1);
+ goto err_remove_bridge;
+ }
+ }
+
+ return lt9611uxc_audio_init(dev, lt9611uxc);
+
+err_remove_bridge:
+ free_irq(client->irq, lt9611uxc);
+ cancel_work_sync(&lt9611uxc->work);
+ drm_bridge_remove(&lt9611uxc->bridge);
+
+err_disable_regulators:
+ regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
+
+err_of_put:
+ of_node_put(lt9611uxc->dsi1_node);
+ of_node_put(lt9611uxc->dsi0_node);
+
+ return ret;
+}
+
+static void lt9611uxc_remove(struct i2c_client *client)
+{
+ struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client);
+
+ free_irq(client->irq, lt9611uxc);
+ cancel_work_sync(&lt9611uxc->work);
+ lt9611uxc_audio_exit(lt9611uxc);
+ drm_bridge_remove(&lt9611uxc->bridge);
+
+ mutex_destroy(&lt9611uxc->ocm_lock);
+
+ regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
+
+ of_node_put(lt9611uxc->dsi1_node);
+ of_node_put(lt9611uxc->dsi0_node);
+}
+
+static struct i2c_device_id lt9611uxc_id[] = {
+ { "lontium,lt9611uxc", 0 },
+ { /* sentinel */ }
+};
+
+static const struct of_device_id lt9611uxc_match_table[] = {
+ { .compatible = "lontium,lt9611uxc" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, lt9611uxc_match_table);
+
+static struct i2c_driver lt9611uxc_driver = {
+ .driver = {
+ .name = "lt9611uxc",
+ .of_match_table = lt9611uxc_match_table,
+ .dev_groups = lt9611uxc_attr_groups,
+ },
+ .probe = lt9611uxc_probe,
+ .remove = lt9611uxc_remove,
+ .id_table = lt9611uxc_id,
+};
+module_i2c_driver(lt9611uxc_driver);
+
+MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>");
+MODULE_LICENSE("GPL v2");