kernel/linux.git/drivers/gpu/drm/amd/display/dmub/src, branch linux-6.9.y

drm/amd/display: add DMUB source files and changes for DCN351

2024-03-04T20:59:07+00:00

DMUB support is required to light-up displays. Signed-off-by: Hamza Mahfooz Signed-off-by: Alex Deucher

drm/amd/display: Fix S4 hang polling on HW power up done for VBIOS DMCUB

2024-02-22T15:18:00+00:00

[Why] VBIOS DMCUB firmware doesn't set the dal_fw bit and we end up hanging waiting for HW power up done because of it. [How] Simplify the path and allow mailbox_rdy to be a functional check when we detect VBIOS firmware. Reviewed-by: Charlene Liu Acked-by: Rodrigo Siqueira Tested-by: Daniel Wheeler Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher

drm/amd/display: Add shared firmware state for DMUB IPS handshake

2024-02-14T22:13:37+00:00

[Why] Read modify write hazards can occur when using a single shared scratch register between driver and firmware leading to driver accessing DCN in IPS2 and a system hang. [How] Add infrastructure for using REGION6 as a shared firmware state between driver and firmware. This region is uncachable. Replace the existing get/set idle calls with reads/writes to the (volatile) shared firmware state blocks that a separated by at least a cache line between firmware and driver. Remove the workarounds that required rewriting/checking read modify write hazards. Reviewed-by: Charlene Liu Acked-by: Aurabindo Pillai Signed-off-by: Nicholas Kazlauskas Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Drop legacy code

2024-02-07T17:26:23+00:00

Display code keeps getting improvements, and because of that, some legacy code is left behind. This commit drops some of those unused codes. Acked-by: Hamza Mahfooz Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd/display: Wait for mailbox ready when powering up DMCUB

2024-01-29T20:41:36+00:00

[Why] Otherwise we can send commands too early and they don't execute until the next command is sent. [How] Check the extra status bit when polling for HW powered up. Reviewed-by: Charlene Liu Acked-by: Tom Chung Signed-off-by: Nicholas Kazlauskas Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add GART memory support for dmcub

2024-01-22T22:13:27+00:00

[Why] In dump file, GART memory can be accessed while frame buffer cannot. [How] Add GART memory support for dmcub. Reviewed-by: Nicholas Kazlauskas Acked-by: Roman Li Signed-off-by: Fudongwang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: skip error logging when DMUB is inactive from S3

2023-12-19T19:59:01+00:00

[Why] On resume from S3, while DMUB is inactive, DMUB queue and execute calls will not work. Skip reporting errors in these scenarios [How] Add new return code during DMUB queue and execute calls when DMUB is in S3 state. Skip logging errors in these scenarios Reviewed-by: Alvin Lee Acked-by: Wayne Lin Signed-off-by: Samson Tam Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: do not send commands to DMUB if DMUB is inactive from S3

2023-12-15T17:16:58+00:00

[Why] On resume from S3, may get apply_idle_optimizations call while DMUB is inactive which will just time out. [How] Set and track power state in dmub_srv and check power state before sending commands to DMUB. Add interface in both dmub_srv and dc_dmub_srv Reviewed-by: Nicholas Kazlauskas Acked-by: Wayne Lin Signed-off-by: Samson Tam Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Increase scratch buffer size

2023-12-06T20:22:33+00:00

[Why] Larger data blocks are expected to be transferred between driver and FW in the future. [How] Embiggen the scratch buffer to a cromulent size. Tested-by: Daniel Wheeler Reviewed-by: Nicholas Kazlauskas Acked-by: Rodrigo Siqueira Signed-off-by: Josip Pavic Signed-off-by: Alex Deucher

drm/amd/display: Include udelay when waiting for INBOX0 ACK

2023-11-29T21:24:30+00:00

When waiting for the ACK for INBOX0 message, we have to ensure to include the udelay for proper wait time Cc: stable@vger.kernel.org # 6.1+ Reviewed-by: Samson Tam Acked-by: Hamza Mahfooz Signed-off-by: Alvin Lee Signed-off-by: Alex Deucher