linux-toradex.git/drivers/gpu/drm/amd/display/include, branch v7.0-rc5

drm/amd/display: Add FR skipping CTS functions

2026-01-27T23:10:33+00:00

1. To check whether Sink reaches maximum skipping number

Reviewed-by: Robin Chen 
Signed-off-by: Jack Chang 
Signed-off-by: Aurabindo Pillai 
Tested-by: Dan Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: PR error HPD_IRQ handling

2026-01-10T19:21:53+00:00

[Why & How]
Add error handling for IRQ_HPD in Panel Replay

Reviewed-by: Robin Chen 
Reviewed-by: Wenjing Liu 
Signed-off-by: Jack Chang 
Signed-off-by: Matthew Stewart 
Tested-by: Dan Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: DPCD for Selective Update

2026-01-10T19:21:53+00:00

[Why&How]
Add flow to read selective update related info from DPCD,
and pass the info to DMUB.

Reviewed-by: Robin Chen 
Reviewed-by: Wenjing Liu 
Signed-off-by: Jack Chang 
Signed-off-by: Matthew Stewart 
Tested-by: Dan Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Correct color depth for SelectCRTC_Source

2026-01-05T22:00:00+00:00

Pass the correct enum values as expected by the VBIOS.
Previously the actual bit depth integer value was passed,
which was a mistake.

Fixes: 7fb4f254c8eb ("drm/amd/display: Add SelectCRTC_Source to BIOS parser")
Reviewed-by: Alex Deucher 
Signed-off-by: Timur Kristóf 
Signed-off-by: Alex Deucher

drm/amd/display: Support DRR granularity

2025-12-16T18:25:41+00:00

[Why&How]
Support DRR granularity for coasting Vtotal calculation

Reviewed-by: Robin Chen 
Reviewed-by: Wenjing Liu 
Signed-off-by: Weiguang Li 
Signed-off-by: Chenyu Chen 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: shrink struct members

2025-12-08T19:25:12+00:00

On a 32-bit ARM system, the audio_decoder struct ends up being too large
for dp_retrain_link_dp_test.

link_dp_cts.c:157:1: error: the frame size of 1328 bytes is larger than
1280 bytes [-Werror=frame-larger-than=]

This is mitigated by shrinking the members of the struct and avoids
having to deal with dynamic allocation.

feed_back_divider is assigned but otherwise unused. Remove both.

pixel_repetition looks like it should be a bool since it's only ever
assigned to 1. But there are checks for 2 and 4. Reduce to uint8_t.

Remove ss_percentage_divider. Unused.

Shrink refresh_rate as it gets assigned to at most a 3 digit integer
value.

Signed-off-by: Rosen Penev 
Reviewed-by: Alex Hung 
Signed-off-by: Alex Deucher

drm/amd/display: Add panel replay enablement option and logic

2025-11-18T15:50:06+00:00

[Why&How]
1.Add flow to enable and configure panel replay enablement and
configuration
2.Add registry key for enable option
3.Add replay version check to be compatible with freesync replay
4.Add AC/DC switch function to notify ac/dc change.
5.Add flow in set event function to check and decide Replay
enable/disable

Reviewed-by: Robin Chen 
Signed-off-by: Jack Chang 
Signed-off-by: Leon Huang 
Signed-off-by: Ivan Lipski 
Tested-by: Dan Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Add DAC_LoadDetection to BIOS parser (v2)

2025-10-28T14:09:55+00:00

DAC_LoadDetection can be used to determine whether something
is connected to an analog connector by determining if there is
an analog load. This causes visible flickering on displays, so
we only resort to using this when the connected display doesn't
have an EDID.

For reference, see the legacy display code:
amdgpu_atombios_encoder_dac_load_detect

v2:
Only clear corresponding bit from BIOS_SCRATCH_0.

Signed-off-by: Timur Kristóf 
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Don't use stereo sync and audio on RGB signals (v2)

2025-10-28T14:08:41+00:00

Analog video signals on VGA or DVI-A (analog part of DVI-I)
don't support audio, so avoid calling any audio related
functions on analog signals.

Stereo sync was not set up for analog signals in the legacy
display code either, so there is no loss of functionality if
we omit it from DC for now.

Also add a dc_is_rgb_signal similar to other dc_is_*_signal.

v2:
Added comment to clarify what we mean by RGB in this context.

Signed-off-by: Timur Kristóf 
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Get maximum pixel clock from VBIOS

2025-10-28T14:08:36+00:00

We will use this for validating the pixel clock when
an analog monitor is connected to VGA or DVI-I connectors.

For reference, see the legacy display code:
amdgpu_connector_vga_mode_valid

Signed-off-by: Timur Kristóf 
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher