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


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