kernel.git/drivers/gpu/drm/amd/display/dc/dc.h, branch linux-6.14.y

drm/amd/display: add workaround flag to link to force FFE preset

2025-04-20T08:22:37Z

[ Upstream commit 51d1b338541dea83fec8e6f95d3e46fa469a73a8 ] [Why] There have been instances of some monitors being unable to link train on their reported link speed using their selected FFE preset. If a different FFE preset is found that has a higher rate of success during link training this workaround can be used to force its FFE preset. [How] A new link workaround flag is made called force_dp_ffe_preset. The flag is checked in override_training_settings and will set lt_settings->ffe_preset which is null if the flag is not set. The flag is then set in override_lane_settings. Reviewed-by: Wenjing Liu Signed-off-by: Brendan Tam Signed-off-by: Aurabindo Pillai Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: 3.2.316

2025-01-10T17:12:47Z

This version brings along following fixes: - Add some feature for secure display - Add replay desync error count tracking and reset - Update chip_cap defines and usage - Remove unnecessary eDP power down - Fix some stuttering/corruption issue on PSR panel - Cleanup and refactoring DML2.1 Acked-by: Wayne Lin Reviewed-by: Martin Leung Signed-off-by: Ryan Seto Signed-off-by: Tom Chung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.315

2025-01-06T19:44:28Z

This version brings along the following: - Add Interface to Dump DSC Caps from dm - Add DP required HBlank size calc to link interface - Add 6bpc RGB case for dcn32 output bpp calculations - Add VC for VESA Aux Backlight Control - Add support for setting multiple CRC windows in dc - Clean up SPL code and outdated interfaces in dcn401_clk_mgr - Disable replay and psr while VRR is enabled - Fix PSR-SU not support but still call the amdgpu_dm_psr_enable - Implement Replay Low Hz Visual Confirm - Extend dc_stream_get_crc to support 2nd crc engine - Update power gating logic for DCN35 hw Reviewed-by: Roman Li Signed-off-by: Martin Leung Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add VC for VESA Aux Backlight Control

2025-01-06T19:44:28Z

[WHY] There is no way to distinguish the static backlight control type being used and the VABC support without the use of a debugger or reading DPCD registers. [HOW] Add Visual Confirm support for VESA Aux-based Backlight Control. Reviewed-by: Harry Vanzylldejong Signed-off-by: Iswara Nagulendran Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Update dc_tiling_info union to structure

2025-01-06T19:44:27Z

[WHY] The `dc_tiling_info` union previously did not have a field to specify the active GFX format, assuming only one format would be used per DCN version. from DCN4+, support for switching between different GFX formats is introduced, requiring a way to track which format is currently in use. [HOW] Updated the `dc_tiling_info` union to include a new field that explicitly indicates the currently used GFX format. This allows the system to determine the active GFX format and take the correct programming path accordingly. [Description] The union `dc_tiling_info` has been updated to support multiple GFX formats by adding a new field for identifying the active format. This update ensures that the correct programming path is followed based on the selected format. All references to `dc_tiling_info` in the codebase have been updated to reflect the new structure. Reviewed-by: Alvin Lee Signed-off-by: Karthi Kandasamy Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: have pretrain for dpia

2025-01-06T19:44:27Z

[WHY] We like to have pretrain for dpia link so that dp and dp tunneling have aligned behavior. The Main difficult for dpia pretrain is that encoder can not get corresponded dpia port when link detection in current implementation. [HOW] 1. create enable/disable dpia output functions for dcn35 encoder and have dpia_id and other necessary info as inputs. 2. dcn35 dpia use the new functions to enable/disable output. 3. have a option to enable/disable the change. Reviewed-by: Wenjing Liu Reviewed-by: Meenakshikumar Somasundaram Signed-off-by: Peichen Huang Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add DP required HBlank size calc to link interface

2025-01-06T19:44:26Z

[Why] Some features, such as HBlank expansion/reduction, needs to know how much HBlank is required to support basic audio. [How] Add interface to link to calculate required HBlank size for a given link + timing combination to support basic audio (i.e. 2-channel 48KHz). Reviewed-by: Wenjing Liu Signed-off-by: George Shen Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Parse RECEIVE_PORT0_CAP capabilities from DPCD

2025-01-06T19:44:26Z

[Why] DPCD register RECEIVE_PORT0_CAP contains HBlank expansion/reduction capabilities of a DP device. These capabilities are required to enable HBlank expansion/reduction logic. [How] Read raw RECEIVE_PORT0_CAP register values and store parsed fields. Reviewed-by: Wenjing Liu Signed-off-by: George Shen Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Cleanup outdated interfaces in dcn401_clk_mgr

2025-01-06T19:44:26Z

[WHY&HOW] - Remove legacy update clocks sequence - FCLK P-State allow message is not required Reviewed-by: Alvin Lee Signed-off-by: Dillon Varone Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: increase MAX_SURFACES to the value supported by hw

2024-12-19T22:39:05Z

As the hw supports up to 4 surfaces, increase the maximum number of surfaces to prevent the DC error when trying to use more than three planes. [drm:dc_state_add_plane [amdgpu]] *ERROR* Surface: can not attach plane_state 000000003e2cb82c! Maximum is: 3 Link: https://gitlab.freedesktop.org/drm/amd/-/issues/3693 Signed-off-by: Melissa Wen Reviewed-by: Rodrigo Siqueira Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher