diff options
| author | Maxime Ripard <mripard@kernel.org> | 2024-05-27 15:58:02 +0200 |
|---|---|---|
| committer | Maxime Ripard <mripard@kernel.org> | 2024-05-28 10:12:59 +0200 |
| commit | e5030a74f976b4e808e28e78805c87203ac1a48d (patch) | |
| tree | 3ee795b86c635644b160b5c447ad4391890e0cfe /include | |
| parent | 62eea520755e867aac35e087634ac40ad54d3201 (diff) | |
drm/connector: hdmi: Add custom hook to filter TMDS character rate
Most of the HDMI controllers have an upper TMDS character rate limit
they can't exceed. On "embedded"-grade display controllers, it will
typically be lower than what high-grade monitors can provide these days,
so drivers will filter the TMDS character rate based on the controller
capabilities.
To make that easier to handle for drivers, let's provide an optional
hook to be implemented by drivers so they can tell the HDMI controller
helpers if a given TMDS character rate is reachable for them or not.
This will then be useful to figure out the best format and bpc count for
a given mode.
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-v15-13-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/drm/drm_connector.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 3bdcf904a11b..ffef967869d9 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -38,6 +38,7 @@ struct drm_connector_helper_funcs; struct drm_modeset_acquire_ctx; struct drm_device; struct drm_crtc; +struct drm_display_mode; struct drm_encoder; struct drm_panel; struct drm_property; @@ -1058,6 +1059,30 @@ struct drm_connector_state { }; /** + * struct drm_connector_hdmi_funcs - drm_hdmi_connector control functions + */ +struct drm_connector_hdmi_funcs { + /** + * @tmds_char_rate_valid: + * + * This callback is invoked at atomic_check time to figure out + * whether a particular TMDS character rate is supported by the + * driver. + * + * The @tmds_char_rate_valid callback is optional. + * + * Returns: + * + * Either &drm_mode_status.MODE_OK or one of the failure reasons + * in &enum drm_mode_status. + */ + enum drm_mode_status + (*tmds_char_rate_valid)(const struct drm_connector *connector, + const struct drm_display_mode *mode, + unsigned long long tmds_rate); +}; + +/** * struct drm_connector_funcs - control connectors on a given device * * Each CRTC may have one or more connectors attached to it. The functions @@ -1929,6 +1954,11 @@ struct drm_connector { * supported by the controller. */ unsigned long supported_formats; + + /** + * @funcs: HDMI connector Control Functions + */ + const struct drm_connector_hdmi_funcs *funcs; } hdmi; }; @@ -1951,6 +1981,7 @@ int drmm_connector_init(struct drm_device *dev, int drmm_connector_hdmi_init(struct drm_device *dev, struct drm_connector *connector, const struct drm_connector_funcs *funcs, + const struct drm_connector_hdmi_funcs *hdmi_funcs, int connector_type, struct i2c_adapter *ddc, unsigned long supported_formats, |