linux-kernel - [PATCH 4.5 028/124] drm/amdgpu/gmc: use proper register for vram type on Fiji

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Date:	Mon, 18 Apr 2016 11:28:20 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Harish Kasiviswanathan <Harish.Kasiviswanathan@....com>,
	Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.5 028/124] drm/amdgpu/gmc: use proper register for vram type on Fiji

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

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

From: Alex Deucher <alexander.deucher@....com>

commit b634de4f446c062a0c95ec4d150b4cf7c85e3526 upstream.

The offset changed on Fiji.

Reviewed-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -866,6 +866,8 @@ static int gmc_v8_0_late_init(void *hand
 	return amdgpu_irq_get(adev, &adev->mc.vm_fault, 0);
 }
 
+#define mmMC_SEQ_MISC0_FIJI 0xA71
+
 static int gmc_v8_0_sw_init(void *handle)
 {
 	int r;
@@ -879,7 +881,12 @@ static int gmc_v8_0_sw_init(void *handle
 	if (adev->flags & AMD_IS_APU) {
 		adev->mc.vram_type = AMDGPU_VRAM_TYPE_UNKNOWN;
 	} else {
-		u32 tmp = RREG32(mmMC_SEQ_MISC0);
+		u32 tmp;
+
+		if (adev->asic_type == CHIP_FIJI)
+			tmp = RREG32(mmMC_SEQ_MISC0_FIJI);
+		else
+			tmp = RREG32(mmMC_SEQ_MISC0);
 		tmp &= MC_SEQ_MISC0__MT__MASK;
 		adev->mc.vram_type = gmc_v8_0_convert_vram_type(tmp);
 	}