kernel/linux.git/include/drm/display/drm_dp.h, branch v6.12.91

drm: Fix DSC BPP increment decoding

2025-02-21T13:01:21+00:00

[ Upstream commit e00a2e5d485faf53c7a24b9d1b575a642227947f ] Starting with DPCD version 2.0 bits 6:3 of the DP_DSC_BITS_PER_PIXEL_INC DPCD register contains the NativeYCbCr422_MAX_bpp_DELTA field, which can be non-zero as opposed to earlier DPCD versions, hence decoding the bit_per_pixel increment value at bits 2:0 in the same register requires applying a mask, do so. Cc: Ankit Nautiyal Fixes: 0c2287c96521 ("drm/display/dp: Add helper function to get DSC bpp precision") Reviewed-by: Jani Nikula Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20250212161851.4007005-1-imre.deak@intel.com Signed-off-by: Sasha Levin

Merge drm/drm-next into drm-misc-next

2024-07-29T07:35:54+00:00

Backmerging to get a late RC of v6.10 before moving into v6.11. Signed-off-by: Thomas Zimmermann

drm/dp: Add helper to dump an LTTPR PHY descriptor

2024-07-11T17:56:26+00:00

Add a helper to dump the DPCD descriptor for an LTTPR PHY. This is based on [1] and [2] moving the helper to DRM core as suggested by Ville. [1] https://lore.kernel.org/all/20240703155937.1674856-5-imre.deak@intel.com [2] https://lore.kernel.org/all/20240703155937.1674856-6-imre.deak@intel.com Cc: dri-devel@lists.freedesktop.org Cc: Ville Syrjälä Reviewed-by: Ankit Nautiyal Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20240708190029.271247-6-imre.deak@intel.com

drm/display: Add missing Panel Replay Enable SU Region ET bit

2024-06-11T09:59:35+00:00

Add missing Panel Replay Enable SU Region ET bit defined in DP2.1 specification. Signed-off-by: Jouni Högander Reviewed-by: Animesh Manna Acked-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20240607134917.1327574-6-jouni.hogander@intel.com

drm/display: Add missing aux less alpm wake related bits

2024-05-31T05:25:14+00:00

eDP1.5 adds some more bits into DP_RECEIVER_ALPM_CAP and DP_RECEIVER_ALPM_CONFIG registers. Add definitions for these. Acked-by: Maxime Ripard Reviewed-by: Ankit Nautiyal Signed-off-by: Jouni Högander Signed-off-by: Animesh Manna Link: https://patchwork.freedesktop.org/patch/msgid/20240529200742.1694401-4-animesh.manna@intel.com

drm/panel replay: Add edp1.5 Panel Replay bits and register

2024-05-29T05:33:42+00:00

Add PANEL_REPLAY_CONFIGURATION_2 register and some missing Panel Replay bits. Signed-off-by: Jouni Högander Reviewed-by: Animesh Manna Acked-by: Maxime Ripard Acked-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20240528114455.175961-3-jouni.hogander@intel.com

drm/panelreplay: dpcd register definition for panelreplay SU

2024-05-15T07:55:52+00:00

Add definitions for panel replay selective update v2: Remove unnecessary Cc from commit message Signed-off-by: Jouni Högander Reviewed-by: Animesh Manna Acked-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20240510093823.3146455-6-jouni.hogander@intel.com

drm/dp: Add Adaptive Sync SDP logging

2024-04-04T07:54:43+00:00

Add structure representing Adaptive Sync Secondary Data Packet (AS SDP). Also, add Adaptive Sync SDP logging in drm_dp_helper.c to facilitate debugging. --v2: - Update logging. [Jani, Ankit] - Use 'as_sdp' instead of 'async' [Ankit] - Correct define placeholders to where they are actually used. [Jani] - Update members in 'as_sdp' structure to make it uniform. [Jani] --v3: - Added changes to dri-devel mailing list. No code changes. --v4: - Instead of directly using operation mode, use an enum to accommodate all operation modes (Ankit). --v5: Nit-pick changes to commit message. --v6: - Add correct place holder and name change for AS_SDP_OP_MODE. - Separate i915 changes from drm changes. - Remove extra lines. --v7: - Add drm/dp in subject line (Ankit) Signed-off-by: Mitul Golani Reviewed-by: Ankit Nautiyal Signed-off-by: Ankit Nautiyal Link: https://patchwork.freedesktop.org/patch/msgid/20240322031157.3823909-3-mitulkumar.ajitkumar.golani@intel.com

drm/i915/dp: Handle DP tunnel IRQs

2024-02-27T15:35:01+00:00

Handle DP tunnel IRQs a sink (or rather a BW management component like the Thunderbolt Connection Manager) raises to signal the completion of a BW request by the driver, or to signal any state change related to the link BW. Reviewed-by: Uma Shankar Reviewed-by: Ville Syrjälä Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20240220211841.448846-18-imre.deak@intel.com

drm/dp: Add support for DP tunneling

2024-02-27T15:34:10+00:00

Add support for Display Port tunneling. For now this includes the support for Bandwidth Allocation Mode (BWA), leaving adding Panel Replay support for later. BWA allows using displays that share the same (Thunderbolt) link with their maximum resolution. Atm, this may not be possible due to the coarse granularity of partitioning the link BW among the displays on the link: the BW allocation policy is in a SW/FW/HW component on the link (on Thunderbolt it's the SW or FW Connection Manager), independent of the driver. This policy will set the DPRX maximum rate and lane count DPCD registers the GFX driver will see (0x00000, 0x00001, 0x02200, 0x02201) based on the available link BW. The granularity of the current BW allocation policy is coarse, based on the required link rate in the 1.62Gbs..8.1Gbps range and it may prevent using higher resolutions all together: the display connected first will get a share of the link BW which corresponds to its full DPRX capability (regardless of the actual mode it uses). A subsequent display connected will only get the remaining BW, which could be well below its full capability. BWA solves the above coarse granularity (reducing it to a 250Mbs..1Gps range) and first-come/first-served issues by letting the driver request the BW for each display on a link which reflects the actual modes the displays use. This patch adds the DRM core helper functions, while a follow-up change in the patchset takes them into use in the i915 driver. v2: - Fix prepare_to_wait vs. wake-up cond check order in allocate_tunnel_bw(). (Ville) - Move tunnel==NULL checks from callers in drivers to here. (Ville) - Avoid var inits in declaration blocks that can fail or have side-effects. (Ville) - Use u8 for driver and group IDs. (Ville) - Simplify API removing drm_dp_tunnel_get/put_untracked(). (Ville) - Reuse str_yes_no() instead of a local yes_no_chr(). (Ville) - s/drm_dp_tunnel_atomic_clear_state()/free_tunnel_state() and unexport the function. (Ville) - s/clear_tunnel_group_state()/free_group_state() and move kfree() to this function. (Ville) - Add separate group_free_bw() helper and describe what the tunnel estimated BW includes. (Ville) - Improve help text for CONFIG_DRM_DISPLAY_DP_TUNNEL. (Ville) - Add code comment explaining the purpose of DPCD reg read helpers. (Ville) - Add code comment describing the tunnel group name prefix format. (Ville) - Report the allocated BW as undetermined until the first allocation request. - Skip allocation requests matching the previous request. - Clear any stale BW request status flags before a new request. - Add missing error return check of drm_dp_tunnel_atomic_get_group_state() in drm_dp_tunnel_atomic_set_stream_bw(). - Add drm_dp_tunnel_get_allocated_bw(). - s/drm_dp_tunnel_atomic_get_tunnel_bw/drm_dp_tunnel_atomic_get_required_bw - Fix return value description in function doc of drm_dp_tunnel_detect(). - Add function documentation to all exported functions. v3: - Improve grouping of fields in drm_dp_tunnel_group struct. (Uma) - Fix validating the BW granularity DPCD reg value. (Uma) - Document return value of check_and_clear_status_change(). (Uma) - Fix resetting drm_dp_tunnel_ref::tunnel in drm_dp_tunnel_ref_put(). (Ville) - Allow for ALLOCATED_BW to change after a BWA enable/disable sequence. Cc: Ville Syrjälä Reviewed-by: Uma Shankar Reviewed-by: Ville Syrjälä Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20240226185246.1276018-2-imre.deak@intel.com