kernel/linux.git/drivers/gpu/drm/amd/display/dc/dc.h, branch linux-7.0.y

drm/amd/display: Allow embedded connectors without DDC

2026-05-23T11:09:33+00:00

[ Upstream commit 494941aa772dab79251543764db6cd14bd337e43 ] On some laptops, the embedded panel may not have a DDC (display data channel) available. On these, the EDID may be hardcoded in ACPI or the VBIOS. In this case, use GPIO_DDC_LINE_UNKNOWN and don't fail. Fixes: def3488eb0fd ("drm/amd/display: refactor HPD to increase flexibility") Link: https://gitlab.freedesktop.org/drm/amd/-/work_items/5192 Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher (cherry picked from commit 75b8a6ca0e8bc3ce24572f854e95f8721b321179) Signed-off-by: Sasha Levin

drm/amd/display: Disable SR feature on eDP1 by default

2026-02-19T17:16:10+00:00

[Why & How] Disable SR feature on eDP1 by default. Reviewed-by: Wenjing Liu Signed-off-by: Charlene Liu Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.369

2026-02-12T20:16:26+00:00

This version brings along following update: -Fix system resume lag issue -Correct hubp GfxVersion verification -Add parse all extension blocks for VSDB -Increase DCN35 SR enter/exit latency -Refactor virtual directory reorganize encoder and hwss files -Set enable_legacy_fast_update to false for DCN36 -Have dm_atomic_state context aligned with dc_state current -Avoid updating surface with the same surface under MPO Acked-by: Wayne Lin Signed-off-by: Taimur Hassan Signed-off-by: Tom Chung Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.368

2026-02-03T21:43:44+00:00

This version brings along following fixes: - Migrate DCCG register access from hwseq to dccg component. - Add lpddr5 handling to dml2.1 - Correct external pr fsm control - Make DCN35 OTG disable w/a reusable - Make DSC FGCG a DSC block level function - Make some DCN35 DCCG symbols reusable - Fix writeback on DCN 3.2+ - Fix IGT link training failure on Replay panel - Fix system resume lag issue - Add oem panel config for new features - Fix IGT ILR link training failure on Replay panel - Fix a NULL pointer dereference in dcn20_hwseq.c - Add Gfx Base Case For Linear Tiling Handling - Migrate DIO registers access from hwseq to dio component. - Match expected data types - Add CRC 32-bit mode support for DCN3.6+ - Init DMUB DPIA Only for APU - DIO memory leak fix. - Add Handling for gfxversion DcGfxBase Acked-by: ChiaHsuan Chung Signed-off-by: Taimur Hassan Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: External panel replay fsm control

2026-02-03T21:39:25+00:00

[WHY] To correctly control external panel replay fsm. [HOW] 1. External panel replay is 1-A option only now. 2. Update cursor update and dirty rects commands for external panel replay support. 3. Add external panel replay support flag in dc. Reviewed-by: Robin Chen Signed-off-by: Peichen Huang Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.367

2026-01-27T23:11:25+00:00

* Fw release 0.1.44.0 * Fixes for corruption on platforms older than DCN4x. * Bug fixes related to USB4 link training * Fixes related to FP guard * Debug helpers and other stability fixes. * Some refactors to improve code quality Signed-off-by: Taimur Hassan Signed-off-by: Aurabindo Pillai Reviewed-by: Alex Hung Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add debug flag to override min dispclk

2026-01-27T23:11:10+00:00

[WHY] Enable dynamic ODM testing without needing a valid dispclk table [HOW] Create a debug flag to specify an override value for min dispclk Reviewed-by: Dmytro Laktyushkin Signed-off-by: Michael Strauss Signed-off-by: Aurabindo Pillai Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Promote DC to 3.2.366

2026-01-20T22:25:56+00:00

This version brings along the following updates: - Update memory QoS measurement interface. - Panel inst for monitors. - Disable FEC when powering down encoders. - Detect panel type from VSDB. - Check NULL before accessing a variable. - Initialize a default to phyd32clk. - Revert "init dispclk from bootup clock". - Add IPS residency info to debugfs. - Ensure link output is disabled in backend reset for PLL_ON. - Remove unused code. - Add DMU crash recovery callback to DM. - Remove coverity comments. Signed-off-by: Taimur Hassan Signed-off-by: Matthew Stewart Tested-by: Dan Wheeler Acked-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: Add DMU crash recovery callback to DM

2026-01-20T22:25:24+00:00

[Why] To improve reliability of the system in the case of infrequent or potentially recoverable hangs when the DMU times out. [How] Attempt to recover the ASIC when DMU hangs by triggering a crash recovery callback for the DM to forward to the base driver. Reviewed-by: Dillon Varone Signed-off-by: Nicholas Kazlauskas Signed-off-by: Matthew Stewart Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Detect panel type from VSDB

2026-01-20T22:19:28+00:00

[Why] The AMD VSDB contains two bits that indicate the type of panel connected. This can be useful for policy decisions based upon panel technology. [How] Read the bits for the panel type when parsing VSDB and store them in the dc_link. Reviewed-by: Harry Wentland Signed-off-by: Mario Limonciello (AMD) Signed-off-by: Matthew Stewart Tested-by: Dan Wheeler Signed-off-by: Alex Deucher