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@xxxxxxxxxxxxxxx>
Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>
---
drivers/gpu/drm/drm_atomic.c | 4 ++-
drivers/gpu/drm/drm_atomic_state_helper.c | 44 +++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 6 +++++
3 files changed, 53 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 93831850ffcd..0c283964cee0 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1144,9 +1144,11 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
drm_printf(p, "\tcolorspace=%s\n", drm_get_colorspace_name(state->colorspace));
if (connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
- connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)
+ 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_full_range=%c\n", state->hdmi.is_full_range ? 'y' : 'n');
+ }
if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
if (state->writeback_job && state->writeback_job->fb)
diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index d93bc7f5faee..08db9956840b 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -31,6 +31,7 @@
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
+#include <drm/drm_edid.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_plane.h>
#include <drm/drm_print.h>
@@ -637,6 +638,47 @@ int drm_atomic_helper_connector_tv_check(struct drm_connector *connector,
}
EXPORT_SYMBOL(drm_atomic_helper_connector_tv_check);
+static const struct drm_display_mode *
+connector_state_get_mode(const struct drm_connector_state *conn_state)
+{
+ struct drm_atomic_state *state;
+ struct drm_crtc_state *crtc_state;
+ struct drm_crtc *crtc;
+
+ state = conn_state->state;
+ if (!state)
+ return NULL;
+
+ crtc = conn_state->crtc;
+ if (!crtc)
+ return NULL;
+
+ crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+ if (!crtc_state)
+ return NULL;
+
+ return &crtc_state->mode;
+}
+
+static bool hdmi_is_full_range(const struct drm_connector *connector,
+ const struct drm_connector_state *state)
+{
+ const struct drm_display_info *display = &connector->display_info;
+ const struct drm_display_mode *mode =
+ connector_state_get_mode(state);
+
+ if (state->hdmi.broadcast_rgb == DRM_HDMI_BROADCAST_RGB_FULL)
+ return true;
+
+ if (state->hdmi.broadcast_rgb == DRM_HDMI_BROADCAST_RGB_LIMITED)
+ return false;
+
+ if (!display->is_hdmi)
+ return true;
+
+ return drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL ? true : false;
+}
+
/**
* drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state
* @connector: DRM Connector
@@ -657,6 +699,8 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector,
struct drm_connector_state *new_state =
drm_atomic_get_new_connector_state(state, connector);
+ new_state->hdmi.is_full_range = hdmi_is_full_range(connector, new_state);
+
if (old_state->hdmi.broadcast_rgb != new_state->hdmi.broadcast_rgb) {
struct drm_crtc *crtc = new_state->crtc;
struct drm_crtc_state *crtc_state;
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 3867a4c01b78..76eecd449fb8 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1066,6 +1066,12 @@ struct drm_connector_state {
* Broadcast RGB selection value.
*/
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_full_range;
} hdmi;
};
--
2.43.0
