kernel.git/include/drm/drm_probe_helper.h, branch linux-rolling-stable

drm/probe-helper: Do not fail from drmm_kms_helper_poll_init()

2025-03-24T08:31:03Z

Failing to set up connector polling is not significant enough to fail device probing. Print a warning and return nothing from the init helper. This only affects the managed init function. The unmanaged init already never fails with an error. Signed-off-by: Thomas Zimmermann Reviewed-by: Patrik Jakobsson Link: https://patchwork.freedesktop.org/patch/msgid/20250303145604.62962-4-tzimmermann@suse.de

drm/ast: Automatically clean up poll helper

2024-04-02T08:40:52Z

Automatically clean up the conncetor-poll thread as part of the DRM device release. The new helper drmm_kms_helper_poll_init() provides a shared implementation for all drivers. v6: - fix kernel doc comment (Sui, kernel test robot) Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Acked-by: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/20240325200855.21150-14-tzimmermann@suse.de

drm/ast: Implement polling for VGA and SIL164 connectors

2024-04-02T08:40:51Z

Implement polling for VGA and SIL164 connectors. Set the flag DRM_CONNECTOR_POLL_DISCONNECT for each to detect the removal of the monitor cable. Implement struct drm_connector_helper_funcs.detect_ctx for each type of connector by testing for EDID data. The helper drm_connector_helper_detect_ctx() implements .detect_ctx() on top of the connector's DDC channel. The function can be used by other drivers as companion to drm_connector_helper_get_modes(). v6: - change helper name to drm_connector_helper_detec_from_ddc() (Maxime, Sui) v5: - share implementation in drm_connector_helper_detect_ctx() (Maxime) - test for DDC presence with drm_probe_ddc() (Maxime, Jani) Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Acked-by: Sui Jingfeng Acked-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20240325200855.21150-13-tzimmermann@suse.de

drm/probe-helper: remove unused drm_connector_helper_get_modes_from_ddc()

2024-01-08T10:37:52Z

Remove the unused drm_connector_helper_get_modes_from_ddc() function. Most drivers should probably have this functionality split to detect and get modes parts, so the helper is not the best abstraction. Suggested-by: Thomas Zimmermann Signed-off-by: Jani Nikula Reviewed-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/60eb6b2db16747d3f9c12604b197f33da585c16e.1704473654.git.jani.nikula@intel.com

drm: Add an HPD poll helper to reschedule the poll work

2023-08-23T21:10:26Z

Add a helper to reschedule drm_mode_config::output_poll_work after polling has been enabled for a connector (and needing a reschedule, since previously polling was disabled for all connectors and hence output_poll_work was not running). This is needed by the next patch fixing HPD polling on i915. CC: stable@vger.kernel.org # 6.4+ Cc: Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org Reviewed-by: Jouni Högander Reviewed-by: Dmitry Baryshkov Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20230822113015.41224-1-imre.deak@intel.com (cherry picked from commit fe2352fd64029918174de4b460dfe6df0c6911cd) Signed-off-by: Rodrigo Vivi

drm/probe-helper: Provide a TV get_modes helper

2022-11-24T11:42:40Z

Most of the TV connectors will need a similar get_modes implementation that will, depending on the drivers' capabilities, register the 480i and 576i modes. That implementation will also need to set the preferred flag and order the modes based on the driver and users preferrence. This is especially important to guarantee that a userspace stack such as Xorg can start and pick up the preferred mode while maintaining a working output. Signed-off-by: Noralf Trønnes Tested-by: Mateusz Kwiatkowski Acked-in-principle-or-something-like-that-by: Daniel Vetter Link: https://lore.kernel.org/r/20220728-rpi-analog-tv-properties-v10-12-256dad125326@cerno.tech Signed-off-by: Maxime Ripard

drm/probe-helper: Add drm_crtc_helper_mode_valid_fixed()

2022-09-12T07:14:26Z

Add drm_crtc_helper_mode_valid_fixed(), which validates a given mode against a display hardware's mode. Convert simpledrm and use it in a few other drivers with static modes. v4: * remove empty line after opening brace v2: * rename 'static' and 'hw' to 'fixed' everywhere Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20220905141648.22013-3-tzimmermann@suse.de

drm/probe-helper: Add drm_connector_helper_get_modes_fixed()

2022-09-12T07:13:25Z

Add drm_connector_helper_get_modes_fixed(), which duplicates a single display mode for a connector. Convert drivers. v2: * rename 'static' and 'hw' to 'fixed' everywhere * fix typo 'there' to 'their' (Sam) Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20220905141648.22013-2-tzimmermann@suse.de

drm/probe-helper: add drm_connector_helper_get_modes()

2022-06-30T07:51:03Z

Add a helper function to be used as the "default" .get_modes() hook. This also works as an example of what the driver .get_modes() hooks are supposed to do regarding the new drm_edid_read*() and drm_edid_connector_update() calls. Signed-off-by: Jani Nikula Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/d985449ed4b95971490ab7c09d2d59b58a892769.1656494768.git.jani.nikula@intel.com

drm/mgag200: Implement connector's get_modes with helper

2022-05-17T18:23:38Z

Provide drm_connector_helper_get_modes_from_ddc() to implement the connector's get_modes callback. The new helper updates the connector from DDC-provided EDID data. v2: * clear property if EDID is NULL in helper Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Tested-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20220516134343.6085-4-tzimmermann@suse.de