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drm/connector: hdmi: Add RGB Quantization Range to the connector state

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HDMI controller drivers will need to figure out the RGB range they need
to configure based on a mode and property values. Let's expose that in
the HDMI connector state so drivers can just use that value.

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-v15-20-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maxime Ripard 2024-05-27 15:58:09 +02:00
parent 73af58c1b4
commit 027d435906
No known key found for this signature in database
GPG Key ID: 275FCE19A23DBE76
3 changed files with 36 additions and 0 deletions
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29
drivers/gpu/drm/display/drm_hdmi_state_helper.c
View File

@ -51,6 +51,33 @@ connector_state_get_mode(const struct drm_connector_state *conn_state)
return &crtc_state->mode;
}
static bool hdmi_is_limited_range(const struct drm_connector *connector,
const struct drm_connector_state *conn_state)
{
const struct drm_display_info *info = &connector->display_info;
const struct drm_display_mode *mode =
connector_state_get_mode(conn_state);
/*
* The Broadcast RGB property only applies to RGB format, and
* i915 just assumes limited range for YCbCr output, so let's
* just do the same.
*/
if (conn_state->hdmi.output_format != HDMI_COLORSPACE_RGB)
return true;
if (conn_state->hdmi.broadcast_rgb == DRM_HDMI_BROADCAST_RGB_FULL)
return false;
if (conn_state->hdmi.broadcast_rgb == DRM_HDMI_BROADCAST_RGB_LIMITED)
return true;
if (!info->is_hdmi)
return false;
return drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED;
}
static bool
sink_supports_format_bpc(const struct drm_connector *connector,
const struct drm_display_info *info,
@ -329,6 +356,8 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
connector_state_get_mode(new_conn_state);
int ret;
new_conn_state->hdmi.is_limited_range = hdmi_is_limited_range(connector, new_conn_state);
ret = hdmi_compute_config(connector, new_conn_state, mode);
if (ret)
return ret;

1
drivers/gpu/drm/drm_atomic.c
View File

@ -1147,6 +1147,7 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
connector->connector_type == DRM_MODE_CONNECTOR_HDMIB) {
drm_printf(p, "\tbroadcast_rgb=%s\n",
drm_hdmi_connector_get_broadcast_rgb_name(state->hdmi.broadcast_rgb));
drm_printf(p, "\tis_limited_range=%c\n", state->hdmi.is_limited_range ? 'y' : 'n');
drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc);
drm_printf(p, "\toutput_format=%s\n",
drm_hdmi_connector_get_output_format_name(state->hdmi.output_format));

6
include/drm/drm_connector.h
View File

@ -1070,6 +1070,12 @@ struct drm_connector_state {
*/
enum drm_hdmi_broadcast_rgb broadcast_rgb;
/**
* @is_full_range: Is the output supposed to use a full
* RGB Quantization Range or not?
*/
bool is_limited_range;
/**
* @output_bpc: Bits per color channel to output.
*/