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drm/amd/display: Clear shared dmub firmware state on init

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[Why]
Reset the shared dmub firmware region on dmub hw init to start with
known state.

[How]
Memset the shared region to 0 in dmub_hw_init().

Suggested-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roman Li
2024-05-06 15:34:55 -04:00
committed by Alex Deucher
parent afa91e2d1e
commit a329598e9e
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -1207,6 +1207,9 @@ static int dm_dmub_hw_init(struct amdgpu_device *adev)
memset(fb_info->fb[DMUB_WINDOW_6_FW_STATE].cpu_addr, 0,
fb_info->fb[DMUB_WINDOW_6_FW_STATE].size);
memset(fb_info->fb[DMUB_WINDOW_SHARED_STATE].cpu_addr, 0,
fb_info->fb[DMUB_WINDOW_SHARED_STATE].size);
/* Initialize hardware. */
memset(&hw_params, 0, sizeof(hw_params));
hw_params.fb_base = adev->gmc.fb_start;