linux-kernel - [PATCH 4.13 17/36] drm/amdgpu: return -ENOENT from uvd 6.0 early init for harvesting

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Date:   Mon,  6 Nov 2017 10:12:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Leo Liu <leo.liu@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.13 17/36] drm/amdgpu: return -ENOENT from uvd 6.0 early init for harvesting

4.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Leo Liu <leo.liu@....com>

commit cb4b02d7cac56a69d8137d8d843507cca9182aed upstream.

Fixes init failures on polaris cards with harvested UVD.

Signed-off-by: Leo Liu <leo.liu@....com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
@@ -93,6 +93,10 @@ static int uvd_v6_0_early_init(void *han
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	if (!(adev->flags & AMD_IS_APU) &&
+	    (RREG32_SMC(ixCC_HARVEST_FUSES) & CC_HARVEST_FUSES__UVD_DISABLE_MASK))
+		return -ENOENT;
+
 	uvd_v6_0_set_ring_funcs(adev);
 	uvd_v6_0_set_irq_funcs(adev);