All the drivers that support the HDR metadata property have a similar function to compare the metadata from one connector state to the next, and force a mode change if they differ.
All these functions run pretty much the same code, so let's turn it into an helper that can be shared across those drivers.
Signed-off-by: Maxime Ripard maxime@cerno.tech --- .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 21 +------------- drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 17 +---------- drivers/gpu/drm/drm_connector.c | 28 +++++++++++++++++++ drivers/gpu/drm/i915/display/intel_atomic.c | 13 +-------- include/drm/drm_connector.h | 2 ++ 5 files changed, 33 insertions(+), 48 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 06908a3cee0f..4eb5201e566a 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -5924,25 +5924,6 @@ static int fill_hdr_info_packet(const struct drm_connector_state *state, return 0; }
-static bool -is_hdr_metadata_different(const struct drm_connector_state *old_state, - const struct drm_connector_state *new_state) -{ - struct drm_property_blob *old_blob = old_state->hdr_output_metadata; - struct drm_property_blob *new_blob = new_state->hdr_output_metadata; - - if (old_blob != new_blob) { - if (old_blob && new_blob && - old_blob->length == new_blob->length) - return memcmp(old_blob->data, new_blob->data, - old_blob->length); - - return true; - } - - return false; -} - static int amdgpu_dm_connector_atomic_check(struct drm_connector *conn, struct drm_atomic_state *state) @@ -5960,7 +5941,7 @@ amdgpu_dm_connector_atomic_check(struct drm_connector *conn, if (!crtc) return 0;
- if (is_hdr_metadata_different(old_con_state, new_con_state)) { + if (!drm_connector_atomic_hdr_metadata_equal(old_con_state, new_con_state)) { struct dc_info_packet hdr_infopacket;
ret = fill_hdr_info_packet(new_con_state, &hdr_infopacket); diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c index f24bbb840dbf..f871e33c2fc9 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c @@ -2395,21 +2395,6 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector) return ret; }
-static bool hdr_metadata_equal(const struct drm_connector_state *old_state, - const struct drm_connector_state *new_state) -{ - struct drm_property_blob *old_blob = old_state->hdr_output_metadata; - struct drm_property_blob *new_blob = new_state->hdr_output_metadata; - - if (!old_blob || !new_blob) - return old_blob == new_blob; - - if (old_blob->length != new_blob->length) - return false; - - return !memcmp(old_blob->data, new_blob->data, old_blob->length); -} - static int dw_hdmi_connector_atomic_check(struct drm_connector *connector, struct drm_atomic_state *state) { @@ -2423,7 +2408,7 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector, if (!crtc) return 0;
- if (!hdr_metadata_equal(old_state, new_state)) { + if (!drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) { crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) return PTR_ERR(crtc_state); diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index e25248e23e18..d781a3a1e9bf 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2170,6 +2170,34 @@ int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *conn } EXPORT_SYMBOL(drm_connector_attach_hdr_output_metadata_property);
+/** + * drm_connector_atomic_hdr_metadata_equal - checks if the hdr metadata changed + * @old_state: old connector state to compare + * @new_state: new connector state to compare + * + * This is used by HDR-enabled drivers to test whether the HDR metadata + * have changed between two different connector state (and thus probably + * requires a full blown mode change). + * + * Returns: + * True if the metadata are equal, False otherwise + */ +bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state, + struct drm_connector_state *new_state) +{ + struct drm_property_blob *old_blob = old_state->hdr_output_metadata; + struct drm_property_blob *new_blob = new_state->hdr_output_metadata; + + if (!old_blob || !new_blob) + return old_blob == new_blob; + + if (old_blob->length != new_blob->length) + return false; + + return !memcmp(old_blob->data, new_blob->data, old_blob->length); +} +EXPORT_SYMBOL(drm_connector_atomic_hdr_metadata_equal); + /** * drm_connector_set_vrr_capable_property - sets the variable refresh rate * capable property for a connector diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c index e00fdc47c0eb..efec9454af5a 100644 --- a/drivers/gpu/drm/i915/display/intel_atomic.c +++ b/drivers/gpu/drm/i915/display/intel_atomic.c @@ -109,16 +109,6 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector, return -EINVAL; }
-static bool blob_equal(const struct drm_property_blob *a, - const struct drm_property_blob *b) -{ - if (a && b) - return a->length == b->length && - !memcmp(a->data, b->data, a->length); - - return !a == !b; -} - int intel_digital_connector_atomic_check(struct drm_connector *conn, struct drm_atomic_state *state) { @@ -149,8 +139,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn, new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio || new_conn_state->base.content_type != old_conn_state->base.content_type || new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode || - !blob_equal(new_conn_state->base.hdr_output_metadata, - old_conn_state->base.hdr_output_metadata)) + !drm_connector_atomic_hdr_metadata_equal(old_state, new_state)) crtc_state->mode_changed = true;
return 0; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 32172dab8427..1f51d73ca715 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1672,6 +1672,8 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, int drm_connector_attach_vrr_capable_property( struct drm_connector *connector); int drm_connector_attach_hdr_output_metadata_property(struct drm_connector *connector); +bool drm_connector_atomic_hdr_metadata_equal(struct drm_connector_state *old_state, + struct drm_connector_state *new_state); int drm_mode_create_aspect_ratio_property(struct drm_device *dev); int drm_mode_create_hdmi_colorspace_property(struct drm_connector *connector); int drm_mode_create_dp_colorspace_property(struct drm_connector *connector);