[PATCH 0/6] Support change dw-hdmi output color

[PATCH 0/6] Support change dw-hdmi output color

[Algea Cao]

Support userspace to set hdmi output color via hdmi properties.
Add hdmi atomic_begin/atomic_flush to make sure screen don't flash
when updating color.


Algea Cao (6):
  drm: Add connector atomic_begin/atomic_flush
  drm: bridge: dw-hdmi: Implement connector atomic_begin/atomic_flush
  drm: bridge: dw-hdmi: Introduce previous_pixelclock/previous_tmdsclock
  drm/rockchip: dw_hdmi: Add vendor hdmi properties
  drm/rockchip: dw_hdmi: Add get_output_bus_format
  drm: bridge: dw-hdmi: Get output bus format when dw-hdmi is the only
    bridge

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 123 ++++++++++-
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.h   |   4 +
 drivers/gpu/drm/drm_atomic_helper.c         |  46 ++++
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 221 ++++++++++++++++++++
 include/drm/bridge/dw_hdmi.h                |  23 ++
 include/drm/drm_modeset_helper_vtables.h    |  19 ++
 6 files changed, 428 insertions(+), 8 deletions(-)

-- 
2.25.1

[PATCH 1/6] drm: Add connector atomic_begin/atomic_flush

[Algea Cao]

In some situations, connector should get some work done
when plane is updating. Such as when change output color
format, hdmi should send AVMUTE to make screen black before
crtc updating color format, or screen may flash. After color
updating, hdmi should clear AVMUTE bring screen back to normal.

The process is as follows:
AVMUTE -> Update CRTC -> Update HDMI -> Clear AVMUTE

So we introduce connector atomic_begin/atomic_flush.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>

---

 drivers/gpu/drm/drm_atomic_helper.c      | 46 ++++++++++++++++++++++++
 include/drm/drm_modeset_helper_vtables.h | 19 ++++++++++
 2 files changed, 65 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index f68c69a45752..f4abd700d2c4 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2471,6 +2471,8 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 				     struct drm_atomic_state *old_state,
 				     uint32_t flags)
 {
+	struct drm_connector *connector;
+	struct drm_connector_state *old_connector_state, *new_connector_state;
 	struct drm_crtc *crtc;
 	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
 	struct drm_plane *plane;
@@ -2479,6 +2481,28 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 	bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
 	bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
 
+	for_each_oldnew_connector_in_state(old_state, connector,
+					   old_connector_state,
+					   new_connector_state, i) {
+		const struct drm_connector_helper_funcs *funcs;
+
+		if (!connector->state->crtc)
+			continue;
+
+		if (!connector->state->crtc->state->active)
+			continue;
+
+		funcs = connector->helper_private;
+
+		if (!funcs || !funcs->atomic_begin)
+			continue;
+
+		DRM_DEBUG_ATOMIC("flush beginning [CONNECTOR:%d:%s]\n",
+				 connector->base.id, connector->name);
+
+		funcs->atomic_begin(connector, old_connector_state);
+	}
+
 	for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
 		const struct drm_crtc_helper_funcs *funcs;
 
@@ -2550,6 +2574,28 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 
 		funcs->atomic_flush(crtc, old_crtc_state);
 	}
+
+	for_each_oldnew_connector_in_state(old_state, connector,
+					   old_connector_state,
+					   new_connector_state, i) {
+		const struct drm_connector_helper_funcs *funcs;
+
+		if (!connector->state->crtc)
+			continue;
+
+		if (!connector->state->crtc->state->active)
+			continue;
+
+		funcs = connector->helper_private;
+
+		if (!funcs || !funcs->atomic_flush)
+			continue;
+
+		DRM_DEBUG_ATOMIC("flushing [CONNECTOR:%d:%s]\n",
+				 connector->base.id, connector->name);
+
+		funcs->atomic_flush(connector, old_connector_state);
+	}
 }
 EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
 
diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
index 421a30f08463..10f3f2e2fe28 100644
--- a/include/drm/drm_modeset_helper_vtables.h
+++ b/include/drm/drm_modeset_helper_vtables.h
@@ -1075,6 +1075,25 @@ struct drm_connector_helper_funcs {
 	void (*atomic_commit)(struct drm_connector *connector,
 			      struct drm_connector_state *state);
 
+	/**
+	 * @atomic_begin:
+	 *
+	 * flush atomic update
+	 *
+	 * This callback is used by the atomic modeset helpers but it is optional.
+	 */
+	void (*atomic_begin)(struct drm_connector *connector,
+			     struct drm_connector_state *state);
+
+	/**
+	 * @atomic_begin:
+	 *
+	 * begin atomic update
+	 *
+	 * This callback is used by the atomic modeset helpers but it is optional.
+	 */
+	void (*atomic_flush)(struct drm_connector *connector,
+			     struct drm_connector_state *state);
 	/**
 	 * @prepare_writeback_job:
 	 *
-- 
2.25.1

[PATCH 2/6] drm: bridge: dw-hdmi: Implement connector atomic_begin/atomic_flush

[Algea Cao]

Introduce dw_hdmi_connector_atomic_begin() and
dw_hdmi_connector_atomic_flush() to implement connector
atomic_begin/atomic_flush. When enc_out_bus_format or
enc_in_bus_format changed, dw_hdmi_setup is called.

To avoid screen flash when updating bus format, it's need
to send AVMUTE flag to make screen black, and clear flag
after bus format updated.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
---

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 65 +++++++++++++++++++++++
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.h |  4 ++
 2 files changed, 69 insertions(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 6148a022569a..a1a81fc768c2 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -108,6 +108,8 @@ struct hdmi_vmode {
 };
 
 struct hdmi_data_info {
+	unsigned int prev_enc_in_bus_format;
+	unsigned int prev_enc_out_bus_format;
 	unsigned int enc_in_bus_format;
 	unsigned int enc_out_bus_format;
 	unsigned int enc_in_encoding;
@@ -116,6 +118,7 @@ struct hdmi_data_info {
 	unsigned int hdcp_enable;
 	struct hdmi_vmode video_mode;
 	bool rgb_limited_range;
+	bool update;
 };
 
 struct dw_hdmi_i2c {
@@ -2401,6 +2404,60 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 	return ret;
 }
 
+static void
+dw_hdmi_connector_atomic_begin(struct drm_connector *connector,
+			       struct drm_connector_state *conn_state)
+{
+	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
+					    connector);
+	unsigned int enc_in_bus_fmt = hdmi->hdmi_data.enc_in_bus_format;
+	unsigned int enc_out_bus_fmt = hdmi->hdmi_data.enc_out_bus_format;
+	unsigned int prev_enc_in_bus_fmt =
+		hdmi->hdmi_data.prev_enc_in_bus_format;
+	unsigned int prev_enc_out_bus_fmt =
+		hdmi->hdmi_data.prev_enc_out_bus_format;
+
+	if (!conn_state->crtc)
+		return;
+
+	if (!hdmi->hdmi_data.video_mode.mpixelclock)
+		return;
+
+	if (enc_in_bus_fmt != prev_enc_in_bus_fmt ||
+	    enc_out_bus_fmt != prev_enc_out_bus_fmt) {
+		hdmi->hdmi_data.update = true;
+		hdmi_writeb(hdmi, HDMI_FC_GCP_SET_AVMUTE, HDMI_FC_GCP);
+		/* Add delay to make av mute work on sink*/
+		msleep(50);
+	} else {
+		hdmi->hdmi_data.update = false;
+	}
+}
+
+static void
+dw_hdmi_connector_atomic_flush(struct drm_connector *connector,
+			       struct drm_connector_state *conn_state)
+{
+	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
+					     connector);
+
+	if (!conn_state->crtc)
+		return;
+
+	DRM_DEBUG("%s\n", __func__);
+
+	if (hdmi->hdmi_data.update) {
+		dw_hdmi_setup(hdmi, hdmi->curr_conn, &hdmi->previous_mode);
+		/*
+		 * Before clear AVMUTE, delay is needed to
+		 * prevent display flash.
+		 */
+		msleep(50);
+		hdmi_writeb(hdmi, HDMI_FC_GCP_CLEAR_AVMUTE, HDMI_FC_GCP);
+		hdmi->hdmi_data.update = false;
+	}
+}
+
 static bool hdr_metadata_equal(const struct drm_connector_state *old_state,
 			       const struct drm_connector_state *new_state)
 {
@@ -2465,6 +2522,8 @@ static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
 static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
 	.get_modes = dw_hdmi_connector_get_modes,
 	.atomic_check = dw_hdmi_connector_atomic_check,
+	.atomic_begin = dw_hdmi_connector_atomic_begin,
+	.atomic_flush = dw_hdmi_connector_atomic_flush,
 };
 
 static int dw_hdmi_connector_create(struct dw_hdmi *hdmi)
@@ -2778,6 +2837,12 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
+	hdmi->hdmi_data.prev_enc_out_bus_format =
+			hdmi->hdmi_data.enc_out_bus_format;
+
+	hdmi->hdmi_data.prev_enc_in_bus_format =
+			hdmi->hdmi_data.enc_in_bus_format;
+
 	hdmi->hdmi_data.enc_out_bus_format =
 			bridge_state->output_bus_cfg.format;
 
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
index 1999db05bc3b..05182418efbb 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
@@ -842,6 +842,10 @@ enum {
 	HDMI_FC_AVICONF3_QUANT_RANGE_LIMITED = 0x00,
 	HDMI_FC_AVICONF3_QUANT_RANGE_FULL = 0x04,
 
+/* HDMI_FC_GCP */
+	HDMI_FC_GCP_SET_AVMUTE = 0x2,
+	HDMI_FC_GCP_CLEAR_AVMUTE = 0x1,
+
 /* FC_DBGFORCE field values */
 	HDMI_FC_DBGFORCE_FORCEAUDIO = 0x10,
 	HDMI_FC_DBGFORCE_FORCEVIDEO = 0x1,
-- 
2.25.1

[PATCH 3/6] drm: bridge: dw-hdmi: Introduce previous_pixelclock/previous_tmdsclock

[Algea Cao]

Introduce previous_pixelclock/previous_tmdsclock to
determine whether PHY needs initialization. If phy is power off,
or mpixelclock/mtmdsclock is different to previous value, phy is
neet to be reinitialized.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
---

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 50 +++++++++++++++++++----
 1 file changed, 43 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a1a81fc768c2..1eb4736b9b59 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -101,6 +101,8 @@ static const u16 csc_coeff_rgb_full_to_rgb_limited[3][4] = {
 struct hdmi_vmode {
 	bool mdataenablepolarity;
 
+	unsigned int previous_pixelclock;
+	unsigned int previous_tmdsclock;
 	unsigned int mpixelclock;
 	unsigned int mpixelrepetitioninput;
 	unsigned int mpixelrepetitionoutput;
@@ -890,6 +892,32 @@ static int hdmi_bus_fmt_color_depth(unsigned int bus_format)
 	}
 }
 
+static unsigned int
+hdmi_get_tmdsclock(struct dw_hdmi *hdmi, unsigned long mpixelclock)
+{
+	unsigned int tmdsclock = mpixelclock;
+	unsigned int depth =
+		hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format);
+
+	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
+		switch (depth) {
+		case 16:
+			tmdsclock = mpixelclock * 2;
+			break;
+		case 12:
+			tmdsclock = mpixelclock * 3 / 2;
+			break;
+		case 10:
+			tmdsclock = mpixelclock * 5 / 4;
+			break;
+		default:
+			break;
+		}
+	}
+
+	return tmdsclock;
+}
+
 /*
  * this submodule is responsible for the video data synchronization.
  * for example, for RGB 4:4:4 input, the data map is defined as
@@ -1861,11 +1889,13 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 	int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
 	unsigned int vdisplay, hdisplay;
 
+	vmode->previous_pixelclock = vmode->mpixelclock;
 	vmode->mpixelclock = mode->clock * 1000;
 
 	dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
 
-	vmode->mtmdsclock = vmode->mpixelclock;
+	vmode->previous_tmdsclock = vmode->mtmdsclock;
+	vmode->mtmdsclock = hdmi_get_tmdsclock(hdmi, vmode->mpixelclock);
 
 	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
 		switch (hdmi_bus_fmt_color_depth(
@@ -2172,12 +2202,18 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi,
 	hdmi_av_composer(hdmi, &connector->display_info, mode);
 
 	/* HDMI Initializateion Step B.2 */
-	ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
-				  &connector->display_info,
-				  &hdmi->previous_mode);
-	if (ret)
-		return ret;
-	hdmi->phy.enabled = true;
+	if (!hdmi->phy.enabled ||
+	    hdmi->hdmi_data.video_mode.previous_pixelclock !=
+	    hdmi->hdmi_data.video_mode.mpixelclock ||
+	    hdmi->hdmi_data.video_mode.previous_tmdsclock !=
+	    hdmi->hdmi_data.video_mode.mtmdsclock) {
+		ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
+					  &connector->display_info,
+					  &hdmi->previous_mode);
+		if (ret)
+			return ret;
+		hdmi->phy.enabled = true;
+	}
 
 	/* HDMI Initialization Step B.3 */
 	dw_hdmi_enable_video_path(hdmi);
-- 
2.25.1

[PATCH 4/6] drm/rockchip: dw_hdmi: Add vendor hdmi properties

[Algea Cao]

Introduce struct dw_hdmi_property_ops in plat_data to support
vendor hdmi property.

Implement hdmi vendor properties color_depth_property and
hdmi_output_property to config hdmi output color depth and
color format.

The property "hdmi_output_format", the possible value
could be:
         - RGB
         - YCBCR 444
         - YCBCR 422
         - YCBCR 420

Default value of the property is set to 0 = RGB, so no changes if you
don't set the property.

The property "hdmi_output_depth" possible value could be
         - Automatic
           This indicates prefer highest color depth, it is
           30bit on rockcip platform.
         - 24bit
         - 30bit
The default value of property is 24bit.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
---

 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 174 ++++++++++++++++++++
 include/drm/bridge/dw_hdmi.h                |  22 +++
 2 files changed, 196 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 23de359a1dec..8f22d9a566db 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -52,6 +52,27 @@
 
 #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
 
+/* HDMI output pixel format */
+enum drm_hdmi_output_type {
+	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
+	DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */
+	DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */
+	DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */
+	DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */
+	DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */
+	DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */
+};
+
+enum dw_hdmi_rockchip_color_depth {
+	ROCKCHIP_HDMI_DEPTH_8,
+	ROCKCHIP_HDMI_DEPTH_10,
+	ROCKCHIP_HDMI_DEPTH_12,
+	ROCKCHIP_HDMI_DEPTH_16,
+	ROCKCHIP_HDMI_DEPTH_420_10,
+	ROCKCHIP_HDMI_DEPTH_420_12,
+	ROCKCHIP_HDMI_DEPTH_420_16
+};
+
 /**
  * struct rockchip_hdmi_chip_data - splite the grf setting of kind of chips
  * @lcdsel_grf_reg: grf register offset of lcdc select
@@ -73,6 +94,12 @@ struct rockchip_hdmi {
 	struct clk *grf_clk;
 	struct dw_hdmi *hdmi;
 	struct phy *phy;
+
+	struct drm_property *color_depth_property;
+	struct drm_property *hdmi_output_property;
+
+	unsigned int colordepth;
+	enum drm_hdmi_output_type hdmi_output;
 };
 
 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
@@ -327,6 +354,150 @@ static void dw_hdmi_rockchip_genphy_disable(struct dw_hdmi *dw_hdmi, void *data)
 	phy_power_off(hdmi->phy);
 }
 
+static const struct drm_prop_enum_list color_depth_enum_list[] = {
+	{ 0, "Automatic" }, /* Prefer highest color depth */
+	{ 8, "24bit" },
+	{ 10, "30bit" },
+};
+
+static const struct drm_prop_enum_list drm_hdmi_output_enum_list[] = {
+	{ DRM_HDMI_OUTPUT_DEFAULT_RGB, "output_rgb" },
+	{ DRM_HDMI_OUTPUT_YCBCR444, "output_ycbcr444" },
+	{ DRM_HDMI_OUTPUT_YCBCR422, "output_ycbcr422" },
+	{ DRM_HDMI_OUTPUT_YCBCR420, "output_ycbcr420" },
+	{ DRM_HDMI_OUTPUT_YCBCR_HQ, "output_ycbcr_high_subsampling" },
+	{ DRM_HDMI_OUTPUT_YCBCR_LQ, "output_ycbcr_low_subsampling" },
+	{ DRM_HDMI_OUTPUT_INVALID, "invalid_output" },
+};
+
+static void
+dw_hdmi_rockchip_attach_properties(struct drm_connector *connector,
+				   unsigned int color, int version,
+				   void *data)
+{
+	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
+	struct drm_property *prop;
+
+	switch (color) {
+	case MEDIA_BUS_FMT_RGB101010_1X30:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_DEFAULT_RGB;
+		hdmi->colordepth = 10;
+		break;
+	case MEDIA_BUS_FMT_YUV8_1X24:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR444;
+		hdmi->colordepth = 8;
+		break;
+	case MEDIA_BUS_FMT_YUV10_1X30:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR444;
+		hdmi->colordepth = 10;
+		break;
+	case MEDIA_BUS_FMT_UYVY10_1X20:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR422;
+		hdmi->colordepth = 10;
+		break;
+	case MEDIA_BUS_FMT_UYVY8_1X16:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR422;
+		hdmi->colordepth = 8;
+		break;
+	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR420;
+		hdmi->colordepth = 8;
+		break;
+	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR420;
+		hdmi->colordepth = 10;
+		break;
+	default:
+		hdmi->hdmi_output = DRM_HDMI_OUTPUT_DEFAULT_RGB;
+		hdmi->colordepth = 8;
+	}
+
+	prop = drm_property_create_enum(connector->dev, 0,
+					"hdmi_output_depth",
+					color_depth_enum_list,
+					ARRAY_SIZE(color_depth_enum_list));
+	if (prop) {
+		hdmi->color_depth_property = prop;
+		drm_object_attach_property(&connector->base, prop, 0);
+	}
+
+	prop = drm_property_create_enum(connector->dev, 0, "hdmi_output_format",
+					drm_hdmi_output_enum_list,
+					ARRAY_SIZE(drm_hdmi_output_enum_list));
+	if (prop) {
+		hdmi->hdmi_output_property = prop;
+		drm_object_attach_property(&connector->base, prop, 0);
+	}
+}
+
+static void
+dw_hdmi_rockchip_destroy_properties(struct drm_connector *connector,
+				    void *data)
+{
+	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
+
+	if (hdmi->color_depth_property) {
+		drm_property_destroy(connector->dev,
+				     hdmi->color_depth_property);
+		hdmi->color_depth_property = NULL;
+	}
+
+	if (hdmi->hdmi_output_property) {
+		drm_property_destroy(connector->dev,
+				     hdmi->hdmi_output_property);
+		hdmi->hdmi_output_property = NULL;
+	}
+}
+
+static int
+dw_hdmi_rockchip_set_property(struct drm_connector *connector,
+			      struct drm_connector_state *state,
+			      struct drm_property *property,
+			      u64 val,
+			      void *data)
+{
+	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
+
+	if (property == hdmi->color_depth_property) {
+		hdmi->colordepth = val;
+		return 0;
+	} else if (property == hdmi->hdmi_output_property) {
+		hdmi->hdmi_output = val;
+		return 0;
+	}
+
+	DRM_ERROR("failed to set rockchip hdmi connector property\n");
+	return -EINVAL;
+}
+
+static int
+dw_hdmi_rockchip_get_property(struct drm_connector *connector,
+			      const struct drm_connector_state *state,
+			      struct drm_property *property,
+			      u64 *val,
+			      void *data)
+{
+	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
+
+	if (property == hdmi->color_depth_property) {
+		*val = hdmi->colordepth;
+		return 0;
+	} else if (property == hdmi->hdmi_output_property) {
+		*val = hdmi->hdmi_output;
+		return 0;
+	}
+
+	DRM_ERROR("failed to get rockchip hdmi connector property\n");
+	return -EINVAL;
+}
+
+static const struct dw_hdmi_property_ops dw_hdmi_rockchip_property_ops = {
+	.attach_properties	= dw_hdmi_rockchip_attach_properties,
+	.destroy_properties	= dw_hdmi_rockchip_destroy_properties,
+	.set_property		= dw_hdmi_rockchip_set_property,
+	.get_property		= dw_hdmi_rockchip_get_property,
+};
+
 static void dw_hdmi_rk3228_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
 {
 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
@@ -511,6 +682,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 	hdmi->dev = &pdev->dev;
 	hdmi->chip_data = plat_data->phy_data;
 	plat_data->phy_data = hdmi;
+
+	plat_data->property_ops = &dw_hdmi_rockchip_property_ops;
+
 	encoder = &hdmi->encoder;
 
 	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index ea34ca146b82..dc561ebe7a9b 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -6,6 +6,7 @@
 #ifndef __DW_HDMI__
 #define __DW_HDMI__
 
+#include <drm/drm_property.h>
 #include <sound/hdmi-codec.h>
 
 struct drm_display_info;
@@ -123,6 +124,24 @@ struct dw_hdmi_phy_ops {
 	void (*setup_hpd)(struct dw_hdmi *hdmi, void *data);
 };
 
+struct dw_hdmi_property_ops {
+	void (*attach_properties)(struct drm_connector *connector,
+				  unsigned int color, int version,
+				  void *data);
+	void (*destroy_properties)(struct drm_connector *connector,
+				   void *data);
+	int (*set_property)(struct drm_connector *connector,
+			    struct drm_connector_state *state,
+			    struct drm_property *property,
+			    u64 val,
+			    void *data);
+	int (*get_property)(struct drm_connector *connector,
+			    const struct drm_connector_state *state,
+			    struct drm_property *property,
+			    u64 *val,
+			    void *data);
+};
+
 struct dw_hdmi_plat_data {
 	struct regmap *regm;
 
@@ -141,6 +160,9 @@ struct dw_hdmi_plat_data {
 					   const struct drm_display_info *info,
 					   const struct drm_display_mode *mode);
 
+	/* Vendor Property support */
+	const struct dw_hdmi_property_ops *property_ops;
+
 	/* Vendor PHY support */
 	const struct dw_hdmi_phy_ops *phy_ops;
 	const char *phy_name;
-- 
2.25.1

[PATCH 5/6] drm/rockchip: dw_hdmi: Add get_output_bus_format

[Algea Cao]

Add get_output_bus_format in dw_hdmi_plat_data to get
hdmi output bus format. The output bus format is determined
by color format and depth, which can be set by rockchip
hdmi properties.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
---

 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 47 +++++++++++++++++++++
 include/drm/bridge/dw_hdmi.h                |  1 +
 2 files changed, 48 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 8f22d9a566db..a602d25639a7 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -100,6 +100,7 @@ struct rockchip_hdmi {
 
 	unsigned int colordepth;
 	enum drm_hdmi_output_type hdmi_output;
+	unsigned long output_bus_format;
 };
 
 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
@@ -498,6 +499,50 @@ static const struct dw_hdmi_property_ops dw_hdmi_rockchip_property_ops = {
 	.get_property		= dw_hdmi_rockchip_get_property,
 };
 
+static void
+dw_hdmi_rockchip_output_bus_format_select(struct rockchip_hdmi *hdmi)
+{
+	unsigned long bus_format;
+
+	if (hdmi->hdmi_output == DRM_HDMI_OUTPUT_YCBCR420) {
+		if (hdmi->colordepth > 8)
+			bus_format = MEDIA_BUS_FMT_UYYVYY10_0_5X30;
+		else
+			bus_format = MEDIA_BUS_FMT_UYYVYY8_0_5X24;
+	} else if (hdmi->hdmi_output == DRM_HDMI_OUTPUT_YCBCR422) {
+		if (hdmi->colordepth == 12)
+			bus_format = MEDIA_BUS_FMT_UYVY12_1X24;
+		else if (hdmi->colordepth == 10)
+			bus_format = MEDIA_BUS_FMT_UYVY10_1X20;
+		else
+			bus_format = MEDIA_BUS_FMT_UYVY8_1X16;
+	} else {
+		if (hdmi->colordepth > 8) {
+			if (hdmi->hdmi_output != DRM_HDMI_OUTPUT_DEFAULT_RGB)
+				bus_format = MEDIA_BUS_FMT_YUV10_1X30;
+			else
+				bus_format = MEDIA_BUS_FMT_RGB101010_1X30;
+		} else {
+			if (hdmi->hdmi_output != DRM_HDMI_OUTPUT_DEFAULT_RGB)
+				bus_format = MEDIA_BUS_FMT_YUV8_1X24;
+			else
+				bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+		}
+	}
+
+	hdmi->output_bus_format = bus_format;
+}
+
+static unsigned long
+dw_hdmi_rockchip_get_output_bus_format(void *data)
+{
+	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
+
+	dw_hdmi_rockchip_output_bus_format_select(hdmi);
+
+	return hdmi->output_bus_format;
+}
+
 static void dw_hdmi_rk3228_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
 {
 	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
@@ -685,6 +730,8 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 
 	plat_data->property_ops = &dw_hdmi_rockchip_property_ops;
 
+	plat_data->get_output_bus_format =
+		dw_hdmi_rockchip_get_output_bus_format;
 	encoder = &hdmi->encoder;
 
 	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index dc561ebe7a9b..13495f810328 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -175,6 +175,7 @@ struct dw_hdmi_plat_data {
 	const struct dw_hdmi_phy_config *phy_config;
 	int (*configure_phy)(struct dw_hdmi *hdmi, void *data,
 			     unsigned long mpixelclock);
+	unsigned long (*get_output_bus_format)(void *data);
 };
 
 struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
-- 
2.25.1

[PATCH 6/6] drm: bridge: dw-hdmi: Get output bus format when dw-hdmi is the only bridge

[Algea Cao]

If plat_data->get_output_bus_format() is exist, we can
use it to get hdmi output bus format when dw-hdmi is the
only bridge. The hdmi output bus format can be set by vendor
properties.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
---

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 1eb4736b9b59..878e9e506963 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2644,6 +2644,8 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 					unsigned int *num_output_fmts)
 {
 	struct drm_connector *conn = conn_state->connector;
+	struct dw_hdmi *hdmi = bridge->driver_private;
+	void *data = hdmi->plat_data->phy_data;
 	struct drm_display_info *info = &conn->display_info;
 	struct drm_display_mode *mode = &crtc_state->mode;
 	u8 max_bpc = conn_state->max_requested_bpc;
@@ -2662,7 +2664,11 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 	/* If dw-hdmi is the only bridge, avoid negociating with ourselves */
 	if (list_is_singular(&bridge->encoder->bridge_chain)) {
 		*num_output_fmts = 1;
-		output_fmts[0] = MEDIA_BUS_FMT_FIXED;
+		if (hdmi->plat_data->get_output_bus_format)
+			output_fmts[0] =
+				hdmi->plat_data->get_output_bus_format(data);
+		else
+			output_fmts[0] = MEDIA_BUS_FMT_FIXED;
 
 		return output_fmts;
 	}
-- 
2.25.1

Re: [PATCH 2/6] drm: bridge: dw-hdmi: Implement connector atomic_begin/atomic_flush

[Laurent Pinchart]

Hi Algea,

Thank you for the patch.

On Wed, Aug 12, 2020 at 04:34:33PM +0800, Algea Cao wrote:
> Introduce dw_hdmi_connector_atomic_begin() and
> dw_hdmi_connector_atomic_flush() to implement connector
> atomic_begin/atomic_flush. When enc_out_bus_format or
> enc_in_bus_format changed, dw_hdmi_setup is called.
> 
> To avoid screen flash when updating bus format, it's need
> to send AVMUTE flag to make screen black, and clear flag
> after bus format updated.
> 
> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> ---
> 
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 65 +++++++++++++++++++++++
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.h |  4 ++
>  2 files changed, 69 insertions(+)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 6148a022569a..a1a81fc768c2 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -108,6 +108,8 @@ struct hdmi_vmode {
>  };
>  
>  struct hdmi_data_info {
> +	unsigned int prev_enc_in_bus_format;
> +	unsigned int prev_enc_out_bus_format;
>  	unsigned int enc_in_bus_format;
>  	unsigned int enc_out_bus_format;
>  	unsigned int enc_in_encoding;
> @@ -116,6 +118,7 @@ struct hdmi_data_info {
>  	unsigned int hdcp_enable;
>  	struct hdmi_vmode video_mode;
>  	bool rgb_limited_range;
> +	bool update;
>  };
>  
>  struct dw_hdmi_i2c {
> @@ -2401,6 +2404,60 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
>  	return ret;
>  }
>  
> +static void
> +dw_hdmi_connector_atomic_begin(struct drm_connector *connector,
> +			       struct drm_connector_state *conn_state)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> +					    connector);
> +	unsigned int enc_in_bus_fmt = hdmi->hdmi_data.enc_in_bus_format;
> +	unsigned int enc_out_bus_fmt = hdmi->hdmi_data.enc_out_bus_format;
> +	unsigned int prev_enc_in_bus_fmt =
> +		hdmi->hdmi_data.prev_enc_in_bus_format;
> +	unsigned int prev_enc_out_bus_fmt =
> +		hdmi->hdmi_data.prev_enc_out_bus_format;
> +
> +	if (!conn_state->crtc)
> +		return;
> +
> +	if (!hdmi->hdmi_data.video_mode.mpixelclock)
> +		return;
> +
> +	if (enc_in_bus_fmt != prev_enc_in_bus_fmt ||
> +	    enc_out_bus_fmt != prev_enc_out_bus_fmt) {
> +		hdmi->hdmi_data.update = true;
> +		hdmi_writeb(hdmi, HDMI_FC_GCP_SET_AVMUTE, HDMI_FC_GCP);
> +		/* Add delay to make av mute work on sink*/
> +		msleep(50);
> +	} else {
> +		hdmi->hdmi_data.update = false;
> +	}
> +}
> +
> +static void
> +dw_hdmi_connector_atomic_flush(struct drm_connector *connector,
> +			       struct drm_connector_state *conn_state)
> +{
> +	struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
> +					     connector);
> +
> +	if (!conn_state->crtc)
> +		return;
> +
> +	DRM_DEBUG("%s\n", __func__);
> +
> +	if (hdmi->hdmi_data.update) {
> +		dw_hdmi_setup(hdmi, hdmi->curr_conn, &hdmi->previous_mode);
> +		/*
> +		 * Before clear AVMUTE, delay is needed to
> +		 * prevent display flash.
> +		 */
> +		msleep(50);
> +		hdmi_writeb(hdmi, HDMI_FC_GCP_CLEAR_AVMUTE, HDMI_FC_GCP);
> +		hdmi->hdmi_data.update = false;
> +	}
> +}
> +
>  static bool hdr_metadata_equal(const struct drm_connector_state *old_state,
>  			       const struct drm_connector_state *new_state)
>  {
> @@ -2465,6 +2522,8 @@ static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
>  static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
>  	.get_modes = dw_hdmi_connector_get_modes,
>  	.atomic_check = dw_hdmi_connector_atomic_check,
> +	.atomic_begin = dw_hdmi_connector_atomic_begin,
> +	.atomic_flush = dw_hdmi_connector_atomic_flush,
>  };
>  
>  static int dw_hdmi_connector_create(struct dw_hdmi *hdmi)
> @@ -2778,6 +2837,12 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
>  {
>  	struct dw_hdmi *hdmi = bridge->driver_private;
>  
> +	hdmi->hdmi_data.prev_enc_out_bus_format =
> +			hdmi->hdmi_data.enc_out_bus_format;
> +
> +	hdmi->hdmi_data.prev_enc_in_bus_format =
> +			hdmi->hdmi_data.enc_in_bus_format;
> +
>  	hdmi->hdmi_data.enc_out_bus_format =
>  			bridge_state->output_bus_cfg.format;
>  

.atomic_check() isn't allowed to change the device state, neither the
hardware state, nor the software state stored in struct dw_hdmi. You
essentially need to treat the drm_bridge and dw_hdmi as const in the
.atomic_check() operation.

> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
> index 1999db05bc3b..05182418efbb 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h
> @@ -842,6 +842,10 @@ enum {
>  	HDMI_FC_AVICONF3_QUANT_RANGE_LIMITED = 0x00,
>  	HDMI_FC_AVICONF3_QUANT_RANGE_FULL = 0x04,
>  
> +/* HDMI_FC_GCP */
> +	HDMI_FC_GCP_SET_AVMUTE = 0x2,
> +	HDMI_FC_GCP_CLEAR_AVMUTE = 0x1,
> +
>  /* FC_DBGFORCE field values */
>  	HDMI_FC_DBGFORCE_FORCEAUDIO = 0x10,
>  	HDMI_FC_DBGFORCE_FORCEVIDEO = 0x1,

-- 
Regards,

Laurent Pinchart

Re: [PATCH 1/6] drm: Add connector atomic_begin/atomic_flush

[Laurent Pinchart]

Hi Algea,

Thank you for the patch.

On Wed, Aug 12, 2020 at 04:34:07PM +0800, Algea Cao wrote:
> In some situations, connector should get some work done
> when plane is updating. Such as when change output color
> format, hdmi should send AVMUTE to make screen black before
> crtc updating color format, or screen may flash. After color
> updating, hdmi should clear AVMUTE bring screen back to normal.
> 
> The process is as follows:
> AVMUTE -> Update CRTC -> Update HDMI -> Clear AVMUTE
> 
> So we introduce connector atomic_begin/atomic_flush.

Implementing this through .atomic_begin() and .atomic_flush() seems like
a pretty big hack to me. Furthermore, I think this should be implemented
as bridge operations, not at the connector level, as the HDMI encoder
may not be the component that implements the drm_connector.

> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> 
> ---
> 
>  drivers/gpu/drm/drm_atomic_helper.c      | 46 ++++++++++++++++++++++++
>  include/drm/drm_modeset_helper_vtables.h | 19 ++++++++++
>  2 files changed, 65 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index f68c69a45752..f4abd700d2c4 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -2471,6 +2471,8 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
>  				     struct drm_atomic_state *old_state,
>  				     uint32_t flags)
>  {
> +	struct drm_connector *connector;
> +	struct drm_connector_state *old_connector_state, *new_connector_state;
>  	struct drm_crtc *crtc;
>  	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
>  	struct drm_plane *plane;
> @@ -2479,6 +2481,28 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
>  	bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
>  	bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
>  
> +	for_each_oldnew_connector_in_state(old_state, connector,
> +					   old_connector_state,
> +					   new_connector_state, i) {
> +		const struct drm_connector_helper_funcs *funcs;
> +
> +		if (!connector->state->crtc)
> +			continue;
> +
> +		if (!connector->state->crtc->state->active)
> +			continue;
> +
> +		funcs = connector->helper_private;
> +
> +		if (!funcs || !funcs->atomic_begin)
> +			continue;
> +
> +		DRM_DEBUG_ATOMIC("flush beginning [CONNECTOR:%d:%s]\n",
> +				 connector->base.id, connector->name);
> +
> +		funcs->atomic_begin(connector, old_connector_state);
> +	}
> +
>  	for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
>  		const struct drm_crtc_helper_funcs *funcs;
>  
> @@ -2550,6 +2574,28 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
>  
>  		funcs->atomic_flush(crtc, old_crtc_state);
>  	}
> +
> +	for_each_oldnew_connector_in_state(old_state, connector,
> +					   old_connector_state,
> +					   new_connector_state, i) {
> +		const struct drm_connector_helper_funcs *funcs;
> +
> +		if (!connector->state->crtc)
> +			continue;
> +
> +		if (!connector->state->crtc->state->active)
> +			continue;
> +
> +		funcs = connector->helper_private;
> +
> +		if (!funcs || !funcs->atomic_flush)
> +			continue;
> +
> +		DRM_DEBUG_ATOMIC("flushing [CONNECTOR:%d:%s]\n",
> +				 connector->base.id, connector->name);
> +
> +		funcs->atomic_flush(connector, old_connector_state);
> +	}
>  }
>  EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
>  
> diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
> index 421a30f08463..10f3f2e2fe28 100644
> --- a/include/drm/drm_modeset_helper_vtables.h
> +++ b/include/drm/drm_modeset_helper_vtables.h
> @@ -1075,6 +1075,25 @@ struct drm_connector_helper_funcs {
>  	void (*atomic_commit)(struct drm_connector *connector,
>  			      struct drm_connector_state *state);
>  
> +	/**
> +	 * @atomic_begin:
> +	 *
> +	 * flush atomic update
> +	 *
> +	 * This callback is used by the atomic modeset helpers but it is optional.
> +	 */
> +	void (*atomic_begin)(struct drm_connector *connector,
> +			     struct drm_connector_state *state);
> +
> +	/**
> +	 * @atomic_begin:
> +	 *
> +	 * begin atomic update
> +	 *
> +	 * This callback is used by the atomic modeset helpers but it is optional.
> +	 */
> +	void (*atomic_flush)(struct drm_connector *connector,
> +			     struct drm_connector_state *state);
>  	/**
>  	 * @prepare_writeback_job:
>  	 *

-- 
Regards,

Laurent Pinchart

Re: [PATCH 4/6] drm/rockchip: dw_hdmi: Add vendor hdmi properties

[Laurent Pinchart]

Hi Algea,

Thank you for the patch.

On Wed, Aug 12, 2020 at 04:35:43PM +0800, Algea Cao wrote:
> Introduce struct dw_hdmi_property_ops in plat_data to support
> vendor hdmi property.
> 
> Implement hdmi vendor properties color_depth_property and
> hdmi_output_property to config hdmi output color depth and
> color format.
> 
> The property "hdmi_output_format", the possible value
> could be:
>          - RGB
>          - YCBCR 444
>          - YCBCR 422
>          - YCBCR 420
> 
> Default value of the property is set to 0 = RGB, so no changes if you
> don't set the property.
> 
> The property "hdmi_output_depth" possible value could be
>          - Automatic
>            This indicates prefer highest color depth, it is
>            30bit on rockcip platform.
>          - 24bit
>          - 30bit
> The default value of property is 24bit.
> 
> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> ---
> 
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 174 ++++++++++++++++++++
>  include/drm/bridge/dw_hdmi.h                |  22 +++
>  2 files changed, 196 insertions(+)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> index 23de359a1dec..8f22d9a566db 100644
> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> @@ -52,6 +52,27 @@
>  
>  #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
>  
> +/* HDMI output pixel format */
> +enum drm_hdmi_output_type {
> +	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
> +	DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */
> +	DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */
> +	DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */
> +	DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */
> +	DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */
> +	DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */
> +};

Vendor-specific properties shouldn't use names starting with drm_ or
DRM_, that's for the DRM core. But this doesn't seem specific to
Rockchip at all, it should be a standard property. Additionally, new
properties need to come with a userspace implementation showing their
usage, in X.org, Weston, the Android DRM/KMS HW composer, or another
relevant upstream project (a test tool is usually not enough).

> +
> +enum dw_hdmi_rockchip_color_depth {
> +	ROCKCHIP_HDMI_DEPTH_8,
> +	ROCKCHIP_HDMI_DEPTH_10,
> +	ROCKCHIP_HDMI_DEPTH_12,
> +	ROCKCHIP_HDMI_DEPTH_16,
> +	ROCKCHIP_HDMI_DEPTH_420_10,
> +	ROCKCHIP_HDMI_DEPTH_420_12,
> +	ROCKCHIP_HDMI_DEPTH_420_16
> +};
> +
>  /**
>   * struct rockchip_hdmi_chip_data - splite the grf setting of kind of chips
>   * @lcdsel_grf_reg: grf register offset of lcdc select
> @@ -73,6 +94,12 @@ struct rockchip_hdmi {
>  	struct clk *grf_clk;
>  	struct dw_hdmi *hdmi;
>  	struct phy *phy;
> +
> +	struct drm_property *color_depth_property;
> +	struct drm_property *hdmi_output_property;
> +
> +	unsigned int colordepth;
> +	enum drm_hdmi_output_type hdmi_output;
>  };
>  
>  #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
> @@ -327,6 +354,150 @@ static void dw_hdmi_rockchip_genphy_disable(struct dw_hdmi *dw_hdmi, void *data)
>  	phy_power_off(hdmi->phy);
>  }
>  
> +static const struct drm_prop_enum_list color_depth_enum_list[] = {
> +	{ 0, "Automatic" }, /* Prefer highest color depth */
> +	{ 8, "24bit" },
> +	{ 10, "30bit" },
> +};
> +
> +static const struct drm_prop_enum_list drm_hdmi_output_enum_list[] = {
> +	{ DRM_HDMI_OUTPUT_DEFAULT_RGB, "output_rgb" },
> +	{ DRM_HDMI_OUTPUT_YCBCR444, "output_ycbcr444" },
> +	{ DRM_HDMI_OUTPUT_YCBCR422, "output_ycbcr422" },
> +	{ DRM_HDMI_OUTPUT_YCBCR420, "output_ycbcr420" },
> +	{ DRM_HDMI_OUTPUT_YCBCR_HQ, "output_ycbcr_high_subsampling" },
> +	{ DRM_HDMI_OUTPUT_YCBCR_LQ, "output_ycbcr_low_subsampling" },
> +	{ DRM_HDMI_OUTPUT_INVALID, "invalid_output" },
> +};
> +
> +static void
> +dw_hdmi_rockchip_attach_properties(struct drm_connector *connector,
> +				   unsigned int color, int version,
> +				   void *data)
> +{
> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> +	struct drm_property *prop;
> +
> +	switch (color) {
> +	case MEDIA_BUS_FMT_RGB101010_1X30:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_DEFAULT_RGB;
> +		hdmi->colordepth = 10;
> +		break;
> +	case MEDIA_BUS_FMT_YUV8_1X24:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR444;
> +		hdmi->colordepth = 8;
> +		break;
> +	case MEDIA_BUS_FMT_YUV10_1X30:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR444;
> +		hdmi->colordepth = 10;
> +		break;
> +	case MEDIA_BUS_FMT_UYVY10_1X20:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR422;
> +		hdmi->colordepth = 10;
> +		break;
> +	case MEDIA_BUS_FMT_UYVY8_1X16:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR422;
> +		hdmi->colordepth = 8;
> +		break;
> +	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR420;
> +		hdmi->colordepth = 8;
> +		break;
> +	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR420;
> +		hdmi->colordepth = 10;
> +		break;
> +	default:
> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_DEFAULT_RGB;
> +		hdmi->colordepth = 8;
> +	}
> +
> +	prop = drm_property_create_enum(connector->dev, 0,
> +					"hdmi_output_depth",
> +					color_depth_enum_list,
> +					ARRAY_SIZE(color_depth_enum_list));
> +	if (prop) {
> +		hdmi->color_depth_property = prop;
> +		drm_object_attach_property(&connector->base, prop, 0);
> +	}
> +
> +	prop = drm_property_create_enum(connector->dev, 0, "hdmi_output_format",
> +					drm_hdmi_output_enum_list,
> +					ARRAY_SIZE(drm_hdmi_output_enum_list));
> +	if (prop) {
> +		hdmi->hdmi_output_property = prop;
> +		drm_object_attach_property(&connector->base, prop, 0);
> +	}
> +}
> +
> +static void
> +dw_hdmi_rockchip_destroy_properties(struct drm_connector *connector,
> +				    void *data)
> +{
> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> +
> +	if (hdmi->color_depth_property) {
> +		drm_property_destroy(connector->dev,
> +				     hdmi->color_depth_property);
> +		hdmi->color_depth_property = NULL;
> +	}
> +
> +	if (hdmi->hdmi_output_property) {
> +		drm_property_destroy(connector->dev,
> +				     hdmi->hdmi_output_property);
> +		hdmi->hdmi_output_property = NULL;
> +	}
> +}
> +
> +static int
> +dw_hdmi_rockchip_set_property(struct drm_connector *connector,
> +			      struct drm_connector_state *state,
> +			      struct drm_property *property,
> +			      u64 val,
> +			      void *data)
> +{
> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> +
> +	if (property == hdmi->color_depth_property) {
> +		hdmi->colordepth = val;
> +		return 0;
> +	} else if (property == hdmi->hdmi_output_property) {
> +		hdmi->hdmi_output = val;
> +		return 0;
> +	}
> +
> +	DRM_ERROR("failed to set rockchip hdmi connector property\n");
> +	return -EINVAL;
> +}
> +
> +static int
> +dw_hdmi_rockchip_get_property(struct drm_connector *connector,
> +			      const struct drm_connector_state *state,
> +			      struct drm_property *property,
> +			      u64 *val,
> +			      void *data)
> +{
> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> +
> +	if (property == hdmi->color_depth_property) {
> +		*val = hdmi->colordepth;
> +		return 0;
> +	} else if (property == hdmi->hdmi_output_property) {
> +		*val = hdmi->hdmi_output;
> +		return 0;
> +	}
> +
> +	DRM_ERROR("failed to get rockchip hdmi connector property\n");
> +	return -EINVAL;
> +}
> +
> +static const struct dw_hdmi_property_ops dw_hdmi_rockchip_property_ops = {
> +	.attach_properties	= dw_hdmi_rockchip_attach_properties,
> +	.destroy_properties	= dw_hdmi_rockchip_destroy_properties,
> +	.set_property		= dw_hdmi_rockchip_set_property,
> +	.get_property		= dw_hdmi_rockchip_get_property,
> +};
> +
>  static void dw_hdmi_rk3228_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
>  {
>  	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> @@ -511,6 +682,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
>  	hdmi->dev = &pdev->dev;
>  	hdmi->chip_data = plat_data->phy_data;
>  	plat_data->phy_data = hdmi;
> +
> +	plat_data->property_ops = &dw_hdmi_rockchip_property_ops;
> +
>  	encoder = &hdmi->encoder;
>  
>  	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index ea34ca146b82..dc561ebe7a9b 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -6,6 +6,7 @@
>  #ifndef __DW_HDMI__
>  #define __DW_HDMI__
>  
> +#include <drm/drm_property.h>
>  #include <sound/hdmi-codec.h>
>  
>  struct drm_display_info;
> @@ -123,6 +124,24 @@ struct dw_hdmi_phy_ops {
>  	void (*setup_hpd)(struct dw_hdmi *hdmi, void *data);
>  };
>  
> +struct dw_hdmi_property_ops {
> +	void (*attach_properties)(struct drm_connector *connector,
> +				  unsigned int color, int version,
> +				  void *data);
> +	void (*destroy_properties)(struct drm_connector *connector,
> +				   void *data);
> +	int (*set_property)(struct drm_connector *connector,
> +			    struct drm_connector_state *state,
> +			    struct drm_property *property,
> +			    u64 val,
> +			    void *data);
> +	int (*get_property)(struct drm_connector *connector,
> +			    const struct drm_connector_state *state,
> +			    struct drm_property *property,
> +			    u64 *val,
> +			    void *data);
> +};
> +
>  struct dw_hdmi_plat_data {
>  	struct regmap *regm;
>  
> @@ -141,6 +160,9 @@ struct dw_hdmi_plat_data {
>  					   const struct drm_display_info *info,
>  					   const struct drm_display_mode *mode);
>  
> +	/* Vendor Property support */
> +	const struct dw_hdmi_property_ops *property_ops;
> +
>  	/* Vendor PHY support */
>  	const struct dw_hdmi_phy_ops *phy_ops;
>  	const char *phy_name;

-- 
Regards,

Laurent Pinchart

Re: [PATCH 4/6] drm/rockchip: dw_hdmi: Add vendor hdmi properties

[Laurent Pinchart]

Hi Algea,

On Wed, Aug 12, 2020 at 07:08:10PM +0800, crj wrote:
> 在 2020/8/12 17:33, Laurent Pinchart 写道:
> > On Wed, Aug 12, 2020 at 04:35:43PM +0800, Algea Cao wrote:
> >> Introduce struct dw_hdmi_property_ops in plat_data to support
> >> vendor hdmi property.
> >>
> >> Implement hdmi vendor properties color_depth_property and
> >> hdmi_output_property to config hdmi output color depth and
> >> color format.
> >>
> >> The property "hdmi_output_format", the possible value
> >> could be:
> >>           - RGB
> >>           - YCBCR 444
> >>           - YCBCR 422
> >>           - YCBCR 420
> >>
> >> Default value of the property is set to 0 = RGB, so no changes if you
> >> don't set the property.
> >>
> >> The property "hdmi_output_depth" possible value could be
> >>           - Automatic
> >>             This indicates prefer highest color depth, it is
> >>             30bit on rockcip platform.
> >>           - 24bit
> >>           - 30bit
> >> The default value of property is 24bit.
> >>
> >> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> >> ---
> >>
> >>   drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 174 ++++++++++++++++++++
> >>   include/drm/bridge/dw_hdmi.h                |  22 +++
> >>   2 files changed, 196 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> >> index 23de359a1dec..8f22d9a566db 100644
> >> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> >> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> >> @@ -52,6 +52,27 @@
> >>   
> >>   #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
> >>   
> >> +/* HDMI output pixel format */
> >> +enum drm_hdmi_output_type {
> >> +	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
> >> +	DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */
> >> +	DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */
> >> +	DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */
> >> +	DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */
> >> +	DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */
> >> +	DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */
> >> +};
> >
> > Vendor-specific properties shouldn't use names starting with drm_ or
> > DRM_, that's for the DRM core. But this doesn't seem specific to
> > Rockchip at all, it should be a standard property. Additionally, new
> > properties need to come with a userspace implementation showing their
> > usage, in X.org, Weston, the Android DRM/KMS HW composer, or another
> > relevant upstream project (a test tool is usually not enough).
> 
> We use these properties only in Android HW composer, But we can't upstream
> 
> our HW composer code right now.  Can we use this properties as private 
> property
> 
> and do not upstream HW composer for the time being?

It's not my decision, it's a policy of the DRM subsystem to require an
open implementation in userspace to validate all API additions.

In any case, I think selection of the output format should be done
through a standard API (very likely a standard DRM property), possibly
related to drm_mode_create_hdmi_colorspace_property(). There's nothing
Rockchip-specific here.

> >> +
> >> +enum dw_hdmi_rockchip_color_depth {
> >> +	ROCKCHIP_HDMI_DEPTH_8,
> >> +	ROCKCHIP_HDMI_DEPTH_10,
> >> +	ROCKCHIP_HDMI_DEPTH_12,
> >> +	ROCKCHIP_HDMI_DEPTH_16,
> >> +	ROCKCHIP_HDMI_DEPTH_420_10,
> >> +	ROCKCHIP_HDMI_DEPTH_420_12,
> >> +	ROCKCHIP_HDMI_DEPTH_420_16
> >> +};
> >> +
> >>   /**
> >>    * struct rockchip_hdmi_chip_data - splite the grf setting of kind of chips
> >>    * @lcdsel_grf_reg: grf register offset of lcdc select
> >> @@ -73,6 +94,12 @@ struct rockchip_hdmi {
> >>   	struct clk *grf_clk;
> >>   	struct dw_hdmi *hdmi;
> >>   	struct phy *phy;
> >> +
> >> +	struct drm_property *color_depth_property;
> >> +	struct drm_property *hdmi_output_property;
> >> +
> >> +	unsigned int colordepth;
> >> +	enum drm_hdmi_output_type hdmi_output;
> >>   };
> >>   
> >>   #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
> >> @@ -327,6 +354,150 @@ static void dw_hdmi_rockchip_genphy_disable(struct dw_hdmi *dw_hdmi, void *data)
> >>   	phy_power_off(hdmi->phy);
> >>   }
> >>   
> >> +static const struct drm_prop_enum_list color_depth_enum_list[] = {
> >> +	{ 0, "Automatic" }, /* Prefer highest color depth */
> >> +	{ 8, "24bit" },
> >> +	{ 10, "30bit" },
> >> +};
> >> +
> >> +static const struct drm_prop_enum_list drm_hdmi_output_enum_list[] = {
> >> +	{ DRM_HDMI_OUTPUT_DEFAULT_RGB, "output_rgb" },
> >> +	{ DRM_HDMI_OUTPUT_YCBCR444, "output_ycbcr444" },
> >> +	{ DRM_HDMI_OUTPUT_YCBCR422, "output_ycbcr422" },
> >> +	{ DRM_HDMI_OUTPUT_YCBCR420, "output_ycbcr420" },
> >> +	{ DRM_HDMI_OUTPUT_YCBCR_HQ, "output_ycbcr_high_subsampling" },
> >> +	{ DRM_HDMI_OUTPUT_YCBCR_LQ, "output_ycbcr_low_subsampling" },
> >> +	{ DRM_HDMI_OUTPUT_INVALID, "invalid_output" },
> >> +};
> >> +
> >> +static void
> >> +dw_hdmi_rockchip_attach_properties(struct drm_connector *connector,
> >> +				   unsigned int color, int version,
> >> +				   void *data)
> >> +{
> >> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> >> +	struct drm_property *prop;
> >> +
> >> +	switch (color) {
> >> +	case MEDIA_BUS_FMT_RGB101010_1X30:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_DEFAULT_RGB;
> >> +		hdmi->colordepth = 10;
> >> +		break;
> >> +	case MEDIA_BUS_FMT_YUV8_1X24:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR444;
> >> +		hdmi->colordepth = 8;
> >> +		break;
> >> +	case MEDIA_BUS_FMT_YUV10_1X30:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR444;
> >> +		hdmi->colordepth = 10;
> >> +		break;
> >> +	case MEDIA_BUS_FMT_UYVY10_1X20:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR422;
> >> +		hdmi->colordepth = 10;
> >> +		break;
> >> +	case MEDIA_BUS_FMT_UYVY8_1X16:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR422;
> >> +		hdmi->colordepth = 8;
> >> +		break;
> >> +	case MEDIA_BUS_FMT_UYYVYY8_0_5X24:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR420;
> >> +		hdmi->colordepth = 8;
> >> +		break;
> >> +	case MEDIA_BUS_FMT_UYYVYY10_0_5X30:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_YCBCR420;
> >> +		hdmi->colordepth = 10;
> >> +		break;
> >> +	default:
> >> +		hdmi->hdmi_output = DRM_HDMI_OUTPUT_DEFAULT_RGB;
> >> +		hdmi->colordepth = 8;
> >> +	}
> >> +
> >> +	prop = drm_property_create_enum(connector->dev, 0,
> >> +					"hdmi_output_depth",
> >> +					color_depth_enum_list,
> >> +					ARRAY_SIZE(color_depth_enum_list));
> >> +	if (prop) {
> >> +		hdmi->color_depth_property = prop;
> >> +		drm_object_attach_property(&connector->base, prop, 0);
> >> +	}
> >> +
> >> +	prop = drm_property_create_enum(connector->dev, 0, "hdmi_output_format",
> >> +					drm_hdmi_output_enum_list,
> >> +					ARRAY_SIZE(drm_hdmi_output_enum_list));
> >> +	if (prop) {
> >> +		hdmi->hdmi_output_property = prop;
> >> +		drm_object_attach_property(&connector->base, prop, 0);
> >> +	}
> >> +}
> >> +
> >> +static void
> >> +dw_hdmi_rockchip_destroy_properties(struct drm_connector *connector,
> >> +				    void *data)
> >> +{
> >> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> >> +
> >> +	if (hdmi->color_depth_property) {
> >> +		drm_property_destroy(connector->dev,
> >> +				     hdmi->color_depth_property);
> >> +		hdmi->color_depth_property = NULL;
> >> +	}
> >> +
> >> +	if (hdmi->hdmi_output_property) {
> >> +		drm_property_destroy(connector->dev,
> >> +				     hdmi->hdmi_output_property);
> >> +		hdmi->hdmi_output_property = NULL;
> >> +	}
> >> +}
> >> +
> >> +static int
> >> +dw_hdmi_rockchip_set_property(struct drm_connector *connector,
> >> +			      struct drm_connector_state *state,
> >> +			      struct drm_property *property,
> >> +			      u64 val,
> >> +			      void *data)
> >> +{
> >> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> >> +
> >> +	if (property == hdmi->color_depth_property) {
> >> +		hdmi->colordepth = val;
> >> +		return 0;
> >> +	} else if (property == hdmi->hdmi_output_property) {
> >> +		hdmi->hdmi_output = val;
> >> +		return 0;
> >> +	}
> >> +
> >> +	DRM_ERROR("failed to set rockchip hdmi connector property\n");
> >> +	return -EINVAL;
> >> +}
> >> +
> >> +static int
> >> +dw_hdmi_rockchip_get_property(struct drm_connector *connector,
> >> +			      const struct drm_connector_state *state,
> >> +			      struct drm_property *property,
> >> +			      u64 *val,
> >> +			      void *data)
> >> +{
> >> +	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> >> +
> >> +	if (property == hdmi->color_depth_property) {
> >> +		*val = hdmi->colordepth;
> >> +		return 0;
> >> +	} else if (property == hdmi->hdmi_output_property) {
> >> +		*val = hdmi->hdmi_output;
> >> +		return 0;
> >> +	}
> >> +
> >> +	DRM_ERROR("failed to get rockchip hdmi connector property\n");
> >> +	return -EINVAL;
> >> +}
> >> +
> >> +static const struct dw_hdmi_property_ops dw_hdmi_rockchip_property_ops = {
> >> +	.attach_properties	= dw_hdmi_rockchip_attach_properties,
> >> +	.destroy_properties	= dw_hdmi_rockchip_destroy_properties,
> >> +	.set_property		= dw_hdmi_rockchip_set_property,
> >> +	.get_property		= dw_hdmi_rockchip_get_property,
> >> +};
> >> +
> >>   static void dw_hdmi_rk3228_setup_hpd(struct dw_hdmi *dw_hdmi, void *data)
> >>   {
> >>   	struct rockchip_hdmi *hdmi = (struct rockchip_hdmi *)data;
> >> @@ -511,6 +682,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
> >>   	hdmi->dev = &pdev->dev;
> >>   	hdmi->chip_data = plat_data->phy_data;
> >>   	plat_data->phy_data = hdmi;
> >> +
> >> +	plat_data->property_ops = &dw_hdmi_rockchip_property_ops;
> >> +
> >>   	encoder = &hdmi->encoder;
> >>   
> >>   	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
> >> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> >> index ea34ca146b82..dc561ebe7a9b 100644
> >> --- a/include/drm/bridge/dw_hdmi.h
> >> +++ b/include/drm/bridge/dw_hdmi.h
> >> @@ -6,6 +6,7 @@
> >>   #ifndef __DW_HDMI__
> >>   #define __DW_HDMI__
> >>   
> >> +#include <drm/drm_property.h>
> >>   #include <sound/hdmi-codec.h>
> >>   
> >>   struct drm_display_info;
> >> @@ -123,6 +124,24 @@ struct dw_hdmi_phy_ops {
> >>   	void (*setup_hpd)(struct dw_hdmi *hdmi, void *data);
> >>   };
> >>   
> >> +struct dw_hdmi_property_ops {
> >> +	void (*attach_properties)(struct drm_connector *connector,
> >> +				  unsigned int color, int version,
> >> +				  void *data);
> >> +	void (*destroy_properties)(struct drm_connector *connector,
> >> +				   void *data);
> >> +	int (*set_property)(struct drm_connector *connector,
> >> +			    struct drm_connector_state *state,
> >> +			    struct drm_property *property,
> >> +			    u64 val,
> >> +			    void *data);
> >> +	int (*get_property)(struct drm_connector *connector,
> >> +			    const struct drm_connector_state *state,
> >> +			    struct drm_property *property,
> >> +			    u64 *val,
> >> +			    void *data);
> >> +};
> >> +
> >>   struct dw_hdmi_plat_data {
> >>   	struct regmap *regm;
> >>   
> >> @@ -141,6 +160,9 @@ struct dw_hdmi_plat_data {
> >>   					   const struct drm_display_info *info,
> >>   					   const struct drm_display_mode *mode);
> >>   
> >> +	/* Vendor Property support */
> >> +	const struct dw_hdmi_property_ops *property_ops;
> >> +
> >>   	/* Vendor PHY support */
> >>   	const struct dw_hdmi_phy_ops *phy_ops;
> >>   	const char *phy_name;

-- 
Regards,

Laurent Pinchart

Re: [PATCH 4/6] drm/rockchip: dw_hdmi: Add vendor hdmi properties

[Pekka Paalanen]

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On Wed, 12 Aug 2020 16:30:17 +0300
Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote:

> Hi Algea,
> 
> On Wed, Aug 12, 2020 at 07:08:10PM +0800, crj wrote:
> > 在 2020/8/12 17:33, Laurent Pinchart 写道:  
> > > On Wed, Aug 12, 2020 at 04:35:43PM +0800, Algea Cao wrote:  
> > >> Introduce struct dw_hdmi_property_ops in plat_data to support
> > >> vendor hdmi property.
> > >>
> > >> Implement hdmi vendor properties color_depth_property and
> > >> hdmi_output_property to config hdmi output color depth and
> > >> color format.
> > >>
> > >> The property "hdmi_output_format", the possible value
> > >> could be:
> > >>           - RGB
> > >>           - YCBCR 444
> > >>           - YCBCR 422
> > >>           - YCBCR 420
> > >>
> > >> Default value of the property is set to 0 = RGB, so no changes if you
> > >> don't set the property.
> > >>
> > >> The property "hdmi_output_depth" possible value could be
> > >>           - Automatic
> > >>             This indicates prefer highest color depth, it is
> > >>             30bit on rockcip platform.
> > >>           - 24bit
> > >>           - 30bit
> > >> The default value of property is 24bit.
> > >>
> > >> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> > >> ---
> > >>
> > >>   drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 174 ++++++++++++++++++++
> > >>   include/drm/bridge/dw_hdmi.h                |  22 +++
> > >>   2 files changed, 196 insertions(+)
> > >>
> > >> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > >> index 23de359a1dec..8f22d9a566db 100644
> > >> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > >> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > >> @@ -52,6 +52,27 @@
> > >>   
> > >>   #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
> > >>   
> > >> +/* HDMI output pixel format */
> > >> +enum drm_hdmi_output_type {
> > >> +	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
> > >> +	DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */
> > >> +	DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */
> > >> +	DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */
> > >> +	DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */
> > >> +	DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */
> > >> +	DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */
> > >> +};  
> > >
> > > Vendor-specific properties shouldn't use names starting with drm_ or
> > > DRM_, that's for the DRM core. But this doesn't seem specific to
> > > Rockchip at all, it should be a standard property. Additionally, new
> > > properties need to come with a userspace implementation showing their
> > > usage, in X.org, Weston, the Android DRM/KMS HW composer, or another
> > > relevant upstream project (a test tool is usually not enough).  
> > 
> > We use these properties only in Android HW composer, But we can't upstream
> > 
> > our HW composer code right now.  Can we use this properties as private 
> > property
> > 
> > and do not upstream HW composer for the time being?  
> 
> It's not my decision, it's a policy of the DRM subsystem to require an
> open implementation in userspace to validate all API additions.

Also read
https://www.kernel.org/doc/html/latest/gpu/drm-uapi.html#open-source-userspace-requirements
very carefully: it calls for a FOSS userspace project's proper upstream
to have reviewed and accepted the patches to use the new UAPI, but
those patches must NOT be MERGED at that time yet.


Thanks,
pq

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Re: [PATCH 4/6] drm/rockchip: dw_hdmi: Add vendor hdmi properties

[Laurent Pinchart]

On Thu, Aug 13, 2020 at 10:42:28AM +0300, Pekka Paalanen wrote:
> On Wed, 12 Aug 2020 16:30:17 +0300 Laurent Pinchart wrote:
> > On Wed, Aug 12, 2020 at 07:08:10PM +0800, crj wrote:
> > > 在 2020/8/12 17:33, Laurent Pinchart 写道:  
> > > > On Wed, Aug 12, 2020 at 04:35:43PM +0800, Algea Cao wrote:  
> > > >> Introduce struct dw_hdmi_property_ops in plat_data to support
> > > >> vendor hdmi property.
> > > >>
> > > >> Implement hdmi vendor properties color_depth_property and
> > > >> hdmi_output_property to config hdmi output color depth and
> > > >> color format.
> > > >>
> > > >> The property "hdmi_output_format", the possible value
> > > >> could be:
> > > >>           - RGB
> > > >>           - YCBCR 444
> > > >>           - YCBCR 422
> > > >>           - YCBCR 420
> > > >>
> > > >> Default value of the property is set to 0 = RGB, so no changes if you
> > > >> don't set the property.
> > > >>
> > > >> The property "hdmi_output_depth" possible value could be
> > > >>           - Automatic
> > > >>             This indicates prefer highest color depth, it is
> > > >>             30bit on rockcip platform.
> > > >>           - 24bit
> > > >>           - 30bit
> > > >> The default value of property is 24bit.
> > > >>
> > > >> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> > > >> ---
> > > >>
> > > >>   drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 174 ++++++++++++++++++++
> > > >>   include/drm/bridge/dw_hdmi.h                |  22 +++
> > > >>   2 files changed, 196 insertions(+)
> > > >>
> > > >> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > > >> index 23de359a1dec..8f22d9a566db 100644
> > > >> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > > >> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > > >> @@ -52,6 +52,27 @@
> > > >>   
> > > >>   #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
> > > >>   
> > > >> +/* HDMI output pixel format */
> > > >> +enum drm_hdmi_output_type {
> > > >> +	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
> > > >> +	DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */
> > > >> +	DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */
> > > >> +	DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */
> > > >> +	DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */
> > > >> +	DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */
> > > >> +	DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */
> > > >> +};  
> > > >
> > > > Vendor-specific properties shouldn't use names starting with drm_ or
> > > > DRM_, that's for the DRM core. But this doesn't seem specific to
> > > > Rockchip at all, it should be a standard property. Additionally, new
> > > > properties need to come with a userspace implementation showing their
> > > > usage, in X.org, Weston, the Android DRM/KMS HW composer, or another
> > > > relevant upstream project (a test tool is usually not enough).  
> > > 
> > > We use these properties only in Android HW composer, But we can't upstream
> > > 
> > > our HW composer code right now.  Can we use this properties as private 
> > > property
> > > 
> > > and do not upstream HW composer for the time being?  
> > 
> > It's not my decision, it's a policy of the DRM subsystem to require an
> > open implementation in userspace to validate all API additions.
> 
> Also read
> https://www.kernel.org/doc/html/latest/gpu/drm-uapi.html#open-source-userspace-requirements
> very carefully: it calls for a FOSS userspace project's proper upstream
> to have reviewed and accepted the patches to use the new UAPI, but
> those patches must NOT be MERGED at that time yet.

Correct. Many userspace projects wouldn't merge a patch before the
kernel API is merged, so that would create a chicken and egg problem :-)

-- 
Regards,

Laurent Pinchart

Re: [PATCH 4/6] drm/rockchip: dw_hdmi: Add vendor hdmi properties

[Pekka Paalanen]

[-- Attachment #1: Type: text/plain, Size: 4477 bytes --]

On Thu, 13 Aug 2020 13:45:22 +0300
Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote:

> On Thu, Aug 13, 2020 at 10:42:28AM +0300, Pekka Paalanen wrote:
> > On Wed, 12 Aug 2020 16:30:17 +0300 Laurent Pinchart wrote:  
> > > On Wed, Aug 12, 2020 at 07:08:10PM +0800, crj wrote:  
> > > > 在 2020/8/12 17:33, Laurent Pinchart 写道:    
> > > > > On Wed, Aug 12, 2020 at 04:35:43PM +0800, Algea Cao wrote:    
> > > > >> Introduce struct dw_hdmi_property_ops in plat_data to support
> > > > >> vendor hdmi property.
> > > > >>
> > > > >> Implement hdmi vendor properties color_depth_property and
> > > > >> hdmi_output_property to config hdmi output color depth and
> > > > >> color format.
> > > > >>
> > > > >> The property "hdmi_output_format", the possible value
> > > > >> could be:
> > > > >>           - RGB
> > > > >>           - YCBCR 444
> > > > >>           - YCBCR 422
> > > > >>           - YCBCR 420
> > > > >>
> > > > >> Default value of the property is set to 0 = RGB, so no changes if you
> > > > >> don't set the property.
> > > > >>
> > > > >> The property "hdmi_output_depth" possible value could be
> > > > >>           - Automatic
> > > > >>             This indicates prefer highest color depth, it is
> > > > >>             30bit on rockcip platform.
> > > > >>           - 24bit
> > > > >>           - 30bit
> > > > >> The default value of property is 24bit.
> > > > >>
> > > > >> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> > > > >> ---
> > > > >>
> > > > >>   drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 174 ++++++++++++++++++++
> > > > >>   include/drm/bridge/dw_hdmi.h                |  22 +++
> > > > >>   2 files changed, 196 insertions(+)
> > > > >>
> > > > >> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > > > >> index 23de359a1dec..8f22d9a566db 100644
> > > > >> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > > > >> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> > > > >> @@ -52,6 +52,27 @@
> > > > >>   
> > > > >>   #define HIWORD_UPDATE(val, mask)	(val | (mask) << 16)
> > > > >>   
> > > > >> +/* HDMI output pixel format */
> > > > >> +enum drm_hdmi_output_type {
> > > > >> +	DRM_HDMI_OUTPUT_DEFAULT_RGB, /* default RGB */
> > > > >> +	DRM_HDMI_OUTPUT_YCBCR444, /* YCBCR 444 */
> > > > >> +	DRM_HDMI_OUTPUT_YCBCR422, /* YCBCR 422 */
> > > > >> +	DRM_HDMI_OUTPUT_YCBCR420, /* YCBCR 420 */
> > > > >> +	DRM_HDMI_OUTPUT_YCBCR_HQ, /* Highest subsampled YUV */
> > > > >> +	DRM_HDMI_OUTPUT_YCBCR_LQ, /* Lowest subsampled YUV */
> > > > >> +	DRM_HDMI_OUTPUT_INVALID, /* Guess what ? */
> > > > >> +};    
> > > > >
> > > > > Vendor-specific properties shouldn't use names starting with drm_ or
> > > > > DRM_, that's for the DRM core. But this doesn't seem specific to
> > > > > Rockchip at all, it should be a standard property. Additionally, new
> > > > > properties need to come with a userspace implementation showing their
> > > > > usage, in X.org, Weston, the Android DRM/KMS HW composer, or another
> > > > > relevant upstream project (a test tool is usually not enough).    
> > > > 
> > > > We use these properties only in Android HW composer, But we can't upstream
> > > > 
> > > > our HW composer code right now.  Can we use this properties as private 
> > > > property
> > > > 
> > > > and do not upstream HW composer for the time being?    
> > > 
> > > It's not my decision, it's a policy of the DRM subsystem to require an
> > > open implementation in userspace to validate all API additions.  
> > 
> > Also read
> > https://www.kernel.org/doc/html/latest/gpu/drm-uapi.html#open-source-userspace-requirements
> > very carefully: it calls for a FOSS userspace project's proper upstream
> > to have reviewed and accepted the patches to use the new UAPI, but
> > those patches must NOT be MERGED at that time yet.  
> 
> Correct. Many userspace projects wouldn't merge a patch before the
> kernel API is merged, so that would create a chicken and egg problem :-)

I wouldn't be so sure that absolutely everyone knows that rule. It only
takes just one userspace project to merge and release with it to
potentially require renaming everything if any change is needed after
the kernel review process.

Actually, if I remember right, I may have seen such merging happen.
After all, "accepted" is usually a synonym for "merged".


Thanks,
pq

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Re: [PATCH 6/6] drm: bridge: dw-hdmi: Get output bus format when dw-hdmi is the only bridge

[Neil Armstrong]

Hi,

On 12/08/2020 10:36, Algea Cao wrote:
> If plat_data->get_output_bus_format() is exist, we can
> use it to get hdmi output bus format when dw-hdmi is the
> only bridge. The hdmi output bus format can be set by vendor
> properties.
> 
> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> ---
> 
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 1eb4736b9b59..878e9e506963 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2644,6 +2644,8 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
>  					unsigned int *num_output_fmts)
>  {
>  	struct drm_connector *conn = conn_state->connector;
> +	struct dw_hdmi *hdmi = bridge->driver_private;
> +	void *data = hdmi->plat_data->phy_data;
>  	struct drm_display_info *info = &conn->display_info;
>  	struct drm_display_mode *mode = &crtc_state->mode;
>  	u8 max_bpc = conn_state->max_requested_bpc;
> @@ -2662,7 +2664,11 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
>  	/* If dw-hdmi is the only bridge, avoid negociating with ourselves */
>  	if (list_is_singular(&bridge->encoder->bridge_chain)) {
>  		*num_output_fmts = 1;
> -		output_fmts[0] = MEDIA_BUS_FMT_FIXED;
> +		if (hdmi->plat_data->get_output_bus_format)
> +			output_fmts[0] =
> +				hdmi->plat_data->get_output_bus_format(data);


The whole bus format negociation was introduced to actually avoid using such get_output_bus_format()
callback, please implement proper bus format negociation.

Neil

> +		else
> +			output_fmts[0] = MEDIA_BUS_FMT_FIXED;
>  
>  		return output_fmts;
>  	}
> 

Re: [PATCH 3/6] drm: bridge: dw-hdmi: Introduce previous_pixelclock/previous_tmdsclock

[Neil Armstrong]

On 12/08/2020 10:34, Algea Cao wrote:
> Introduce previous_pixelclock/previous_tmdsclock to
> determine whether PHY needs initialization. If phy is power off,
> or mpixelclock/mtmdsclock is different to previous value, phy is
> neet to be reinitialized.
> 
> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> ---
> 
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 50 +++++++++++++++++++----
>  1 file changed, 43 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index a1a81fc768c2..1eb4736b9b59 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -101,6 +101,8 @@ static const u16 csc_coeff_rgb_full_to_rgb_limited[3][4] = {
>  struct hdmi_vmode {
>  	bool mdataenablepolarity;
>  
> +	unsigned int previous_pixelclock;
> +	unsigned int previous_tmdsclock;
>  	unsigned int mpixelclock;
>  	unsigned int mpixelrepetitioninput;
>  	unsigned int mpixelrepetitionoutput;
> @@ -890,6 +892,32 @@ static int hdmi_bus_fmt_color_depth(unsigned int bus_format)
>  	}
>  }
>  
> +static unsigned int
> +hdmi_get_tmdsclock(struct dw_hdmi *hdmi, unsigned long mpixelclock)
> +{
> +	unsigned int tmdsclock = mpixelclock;
> +	unsigned int depth =
> +		hdmi_bus_fmt_color_depth(hdmi->hdmi_data.enc_out_bus_format);
> +
> +	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
> +		switch (depth) {
> +		case 16:
> +			tmdsclock = mpixelclock * 2;
> +			break;
> +		case 12:
> +			tmdsclock = mpixelclock * 3 / 2;
> +			break;
> +		case 10:
> +			tmdsclock = mpixelclock * 5 / 4;
> +			break;
> +		default:
> +			break;
> +		}
> +	}


Where does this come from ? Please introduce this on another patch.

Neil

> +
> +	return tmdsclock;
> +}
> +
>  /*
>   * this submodule is responsible for the video data synchronization.
>   * for example, for RGB 4:4:4 input, the data map is defined as
> @@ -1861,11 +1889,13 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
>  	int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
>  	unsigned int vdisplay, hdisplay;
>  
> +	vmode->previous_pixelclock = vmode->mpixelclock;
>  	vmode->mpixelclock = mode->clock * 1000;
>  
>  	dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
>  
> -	vmode->mtmdsclock = vmode->mpixelclock;
> +	vmode->previous_tmdsclock = vmode->mtmdsclock;
> +	vmode->mtmdsclock = hdmi_get_tmdsclock(hdmi, vmode->mpixelclock);
>  
>  	if (!hdmi_bus_fmt_is_yuv422(hdmi->hdmi_data.enc_out_bus_format)) {
>  		switch (hdmi_bus_fmt_color_depth(
> @@ -2172,12 +2202,18 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi,
>  	hdmi_av_composer(hdmi, &connector->display_info, mode);
>  
>  	/* HDMI Initializateion Step B.2 */
> -	ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
> -				  &connector->display_info,
> -				  &hdmi->previous_mode);
> -	if (ret)
> -		return ret;
> -	hdmi->phy.enabled = true;
> +	if (!hdmi->phy.enabled ||
> +	    hdmi->hdmi_data.video_mode.previous_pixelclock !=
> +	    hdmi->hdmi_data.video_mode.mpixelclock ||
> +	    hdmi->hdmi_data.video_mode.previous_tmdsclock !=
> +	    hdmi->hdmi_data.video_mode.mtmdsclock) {
> +		ret = hdmi->phy.ops->init(hdmi, hdmi->phy.data,
> +					  &connector->display_info,
> +					  &hdmi->previous_mode);
> +		if (ret)
> +			return ret;
> +		hdmi->phy.enabled = true;
> +	}
>  
>  	/* HDMI Initialization Step B.3 */
>  	dw_hdmi_enable_video_path(hdmi);
>