HDMI controller drivers will need to figure out the RGB range they need
to configure based on a given atomic state.
Let's provide a helper to provide that information.
Signed-off-by: Maxime Ripard <mrip...@kernel.org>
---
drivers/gpu/drm/drm_hdmi_connector.c | 41 ++++++++++++++++++++++++++++++++++++
include/drm/drm_connector.h | 4 ++++
2 files changed, 45 insertions(+)
diff --git a/drivers/gpu/drm/drm_hdmi_connector.c
b/drivers/gpu/drm/drm_hdmi_connector.c
index 2b6b9d444774..1fe3f3ebf719 100644
--- a/drivers/gpu/drm/drm_hdmi_connector.c
+++ b/drivers/gpu/drm/drm_hdmi_connector.c
@@ -4,6 +4,7 @@
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
#include <drm/drm_mode.h>
#include <drm/drm_print.h>
@@ -217,6 +218,15 @@ int drm_atomic_helper_hdmi_connector_set_property(struct
drm_connector *connecto
}
EXPORT_SYMBOL(drm_atomic_helper_hdmi_connector_set_property);
+static const struct drm_display_mode *
+connector_state_get_adjusted_mode(const struct drm_connector_state *state)
+{
+ struct drm_crtc *crtc = state->crtc;
+ struct drm_crtc_state *crtc_state = crtc->state;
+
+ return &crtc_state->adjusted_mode;
+}
+
/**
* drm_atomic_helper_hdmi_connector_atomic_check() - Helper to check HDMI
connector atomic state
* @connector: the parent connector this state refers to
@@ -259,6 +269,37 @@ int drm_atomic_helper_hdmi_connector_atomic_check(struct
drm_connector *connecto
}
EXPORT_SYMBOL(drm_atomic_helper_hdmi_connector_atomic_check);
+/**
+ * drm_atomic_helper_hdmi_connector_is_full_range() - Checks whether a state
uses Full-Range RGB
+ * @hdmi_connector: the HDMI connector this state refers to
+ * @hdmi_state: the HDMI connector state to check
+ *
+ * RETURNS:
+ * True if @hdmi_state requires a Full range RGB output, False otherwise
+ */
+bool
+drm_atomic_helper_hdmi_connector_is_full_range(const struct drm_hdmi_connector
*hdmi_connector,
+ const struct
drm_hdmi_connector_state *hdmi_state)
+{
+ const struct drm_connector *connector = &hdmi_connector->base;
+ const struct drm_connector_state *conn_state = &hdmi_state->base;
+ const struct drm_display_mode *mode =
+ connector_state_get_adjusted_mode(conn_state);
+ const struct drm_display_info *display = &connector->display_info;
+
+ if (hdmi_state->broadcast_rgb == DRM_HDMI_BROADCAST_RGB_FULL)
+ return true;
+
+ if (hdmi_state->broadcast_rgb == DRM_HDMI_BROADCAST_RGB_LIMITED)
+ return false;
+
+ if (!display->is_hdmi)
+ return true;
+
+ return drm_default_rgb_quant_range(mode);
+}
+EXPORT_SYMBOL(drm_atomic_helper_hdmi_connector_is_full_range);
+
static const struct drm_prop_enum_list broadcast_rgb_names[] = {
{ DRM_HDMI_BROADCAST_RGB_AUTO, "Automatic" },
{ DRM_HDMI_BROADCAST_RGB_FULL, "Full" },
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 24a0d33e5148..dff95e6e2b48 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -2111,6 +2111,10 @@ int drm_atomic_helper_hdmi_connector_atomic_check(struct
drm_connector *connecto
void drm_atomic_helper_hdmi_connector_print_state(struct drm_printer *p,
const struct
drm_connector_state *state);
+bool
+drm_atomic_helper_hdmi_connector_is_full_range(const struct drm_hdmi_connector
*hdmi_connector,
+ const struct
drm_hdmi_connector_state *hdmi_state);
+
struct drm_hdmi_connector {
/**
* @base: Base Connector
--
2.41.0
