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drm/connector: hdmi: Add support for output format

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Just like BPC, we'll add support for automatic selection of the output
format for HDMI connectors.

Let's add the needed defaults and fields for now.

Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-7-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maxime Ripard
2024-05-27 15:57:56 +02:00
parent eb66d34d79
commit 948f01d5e5
6 changed files with 81 additions and 6 deletions
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31
drivers/gpu/drm/drm_connector.c
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@@ -459,6 +459,7 @@ EXPORT_SYMBOL(drmm_connector_init);
* @funcs: callbacks for this connector
* @connector_type: user visible type of the connector
* @ddc: optional pointer to the associated ddc adapter
* @supported_formats: Bitmask of @hdmi_colorspace listing supported output formats
* @max_bpc: Maximum bits per char the HDMI connector supports
*
* Initialises a preallocated HDMI connector. Connectors can be
@@ -477,6 +478,7 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
const struct drm_connector_funcs *funcs,
int connector_type,
struct i2c_adapter *ddc,
unsigned long supported_formats,
unsigned int max_bpc)
{
int ret;
@@ -485,6 +487,9 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
connector_type == DRM_MODE_CONNECTOR_HDMIB))
return -EINVAL;
if (!supported_formats || !(supported_formats & BIT(HDMI_COLORSPACE_RGB)))
return -EINVAL;
if (!(max_bpc == 8 || max_bpc == 10 || max_bpc == 12))
return -EINVAL;
@@ -492,6 +497,8 @@ int drmm_connector_hdmi_init(struct drm_device *dev,
if (ret)
return ret;
connector->hdmi.supported_formats = supported_formats;
/*
* drm_connector_attach_max_bpc_property() requires the
* connector to have a state.
@@ -1201,6 +1208,30 @@ static const u32 dp_colorspaces =
BIT(DRM_MODE_COLORIMETRY_BT2020_CYCC) |
BIT(DRM_MODE_COLORIMETRY_BT2020_YCC);
static const char * const output_format_str[] = {
[HDMI_COLORSPACE_RGB] = "RGB",
[HDMI_COLORSPACE_YUV420] = "YUV 4:2:0",
[HDMI_COLORSPACE_YUV422] = "YUV 4:2:2",
[HDMI_COLORSPACE_YUV444] = "YUV 4:4:4",
};
/*
* drm_hdmi_connector_get_output_format_name() - Return a string for HDMI connector output format
* @fmt: Output format to compute name of
*
* Returns: the name of the output format, or NULL if the type is not
* valid.
*/
const char *
drm_hdmi_connector_get_output_format_name(enum hdmi_colorspace fmt)
{
if (fmt >= ARRAY_SIZE(output_format_str))
return NULL;
return output_format_str[fmt];
}
EXPORT_SYMBOL(drm_hdmi_connector_get_output_format_name);
/**
* DOC: standard connector properties
*