[AMD Public Use] Acked-by: Alex Deucher <alexander.deuc...@amd.com> ________________________________ From: Aaron Ma <aaron...@canonical.com> Sent: Wednesday, July 8, 2020 4:16 AM To: Wentland, Harry <harry.wentl...@amd.com>; Li, Sun peng (Leo) <sunpeng...@amd.com>; Deucher, Alexander <alexander.deuc...@amd.com>; Koenig, Christian <christian.koe...@amd.com>; airl...@linux.ie <airl...@linux.ie>; dan...@ffwll.ch <dan...@ffwll.ch>; amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>; dri-de...@lists.freedesktop.org <dri-de...@lists.freedesktop.org>; linux-ker...@vger.kernel.org <linux-ker...@vger.kernel.org>; mapen...@gmail.com <mapen...@gmail.com>; aaron...@canonical.com <aaron...@canonical.com> Subject: [PATCH] drm/amd/display: add dmcub check on RENOIR
RENOIR loads dmub fw not dmcu, check dmcu only will prevent loading iram, it breaks backlight control. Bug: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugzilla.kernel.org%2Fshow_bug.cgi%3Fid%3D208277&data=02%7C01%7Calexander.deucher%40amd.com%7Cf922a1848f1f4cc4934f08d823174036%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637297930080282163&sdata=limstWv5pwvdqDRpKoKpCZcutV4pmqhdqR7CFEimR2Q%3D&reserved=0 Signed-off-by: Aaron Ma <aaron...@canonical.com> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 10ac8076d4f2..db5e0bb0d935 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1358,7 +1358,7 @@ static int dm_late_init(void *handle) struct dmcu *dmcu = NULL; bool ret; - if (!adev->dm.fw_dmcu) + if (!adev->dm.fw_dmcu && !adev->dm.dmub_fw) return detect_mst_link_for_all_connectors(adev->ddev); dmcu = adev->dm.dc->res_pool->dmcu; -- 2.25.1
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