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drm/amd/display: Check DMCU Exists Before Loading 

[ Upstream commit 17bdb4a82f ]

Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Jerry (Fangzhi) Zuo 2020-04-24 14:09:23 -04:00 committed by Greg Kroah-Hartman
parent 722c6e954c
commit 02140e85d8
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -928,9 +928,14 @@ static int dm_late_init(void *handle)
struct dmcu_iram_parameters params;
unsigned int linear_lut[16];
int i;
struct dmcu *dmcu = adev->dm.dc->res_pool->dmcu;
struct dmcu *dmcu = NULL;
bool ret;
if (!adev->dm.fw_dmcu)
return detect_mst_link_for_all_connectors(adev->ddev);
dmcu = adev->dm.dc->res_pool->dmcu;
for (i = 0; i < 16; i++)
linear_lut[i] = 0xFFFF * i / 15;