diff options
| author | Maxime Ripard <maxime@cerno.tech> | 2021-04-30 11:44:48 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2021-05-07 17:13:09 +0200 |
| commit | 72921cdf8ac248c904e3883418d2f74f45028222 (patch) | |
| tree | bb5fcfbe81c0031cc498fd72d84437f14019547c /drivers/gpu/drm/drm_connector.c | |
| parent | e057b52c1d90e2898fdc01c95d21bd70c81b968a (diff) | |
drm/connector: Add helper to compare HDR metadata
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.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210430094451.2145002-2-maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 7eb7b6db515f..7b2231b1661c 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2174,6 +2174,34 @@ 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 * @connector: drm connector |