linux-kernel - [PATCH AUTOSEL 5.10 005/217] drm/amd/display: Fix the display corruption issue on Navi10

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Date:   Tue, 22 Dec 2020 21:12:54 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yifan Zhang <yifan1.zhang@....com>,
        Matt Coffin <mcoffin13@...il.com>,
        Alex Deucher <alexander.deucher@....com>,
        Roman Li <Roman.Li@....com>, Sasha Levin <sashal@...nel.org>,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.10 005/217] drm/amd/display: Fix the display corruption issue on Navi10

From: Yifan Zhang <yifan1.zhang@....com>

[ Upstream commit 0b08c54bb7a37047a3a006e36c2270ebc62fef7d ]

[Why]
Screen corruption on Navi10 card

[How]
Set system context in DCN only on Renoir

Tested-by: Matt Coffin <mcoffin13@...il.com>
Acked-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Yifan Zhang <yifan1.zhang@....com>
Reviewed-by: Roman Li <Roman.Li@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

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 547928cf284b5..96907707fdd94 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1085,10 +1085,14 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	dc_hardware_init(adev->dm.dc);
 
-	mmhub_read_system_context(adev, &pa_config);
+#if defined(CONFIG_DRM_AMD_DC_DCN)
+	if (adev->asic_type == CHIP_RENOIR) {
+		mmhub_read_system_context(adev, &pa_config);
 
-	// Call the DC init_memory func
-	dc_setup_system_context(adev->dm.dc, &pa_config);
+		// Call the DC init_memory func
+		dc_setup_system_context(adev->dm.dc, &pa_config);
+	}
+#endif
 
 	adev->dm.freesync_module = mod_freesync_create(adev->dm.dc);
 	if (!adev->dm.freesync_module) {
-- 
2.27.0