drm/amdgpu/gmc9: get vram width from atom for Raven

Get it from the system info table.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index dbb43d9..8ec1487 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -23,6 +23,7 @@
 #include <linux/firmware.h>
 #include "amdgpu.h"
 #include "gmc_v9_0.h"
+#include "amdgpu_atomfirmware.h"
 
 #include "vega10/soc15ip.h"
 #include "vega10/HDP/hdp_4_0_offset.h"
@@ -442,43 +443,46 @@ static int gmc_v9_0_mc_init(struct amdgpu_device *adev)
        u32 tmp;
        int chansize, numchan;
 
-       /* hbm memory channel size */
-       chansize = 128;
-
-       tmp = RREG32_SOC15(DF, 0, mmDF_CS_AON0_DramBaseAddress0);
-       tmp &= DF_CS_AON0_DramBaseAddress0__IntLvNumChan_MASK;
-       tmp >>= DF_CS_AON0_DramBaseAddress0__IntLvNumChan__SHIFT;
-       switch (tmp) {
-       case 0:
-       default:
-               numchan = 1;
-               break;
-       case 1:
-               numchan = 2;
-               break;
-       case 2:
-               numchan = 0;
-               break;
-       case 3:
-               numchan = 4;
-               break;
-       case 4:
-               numchan = 0;
-               break;
-       case 5:
-               numchan = 8;
-               break;
-       case 6:
-               numchan = 0;
-               break;
-       case 7:
-               numchan = 16;
-               break;
-       case 8:
-               numchan = 2;
-               break;
+       adev->mc.vram_width = amdgpu_atomfirmware_get_vram_width(adev);
+       if (!adev->mc.vram_width) {
+               /* hbm memory channel size */
+               chansize = 128;
+
+               tmp = RREG32_SOC15(DF, 0, mmDF_CS_AON0_DramBaseAddress0);
+               tmp &= DF_CS_AON0_DramBaseAddress0__IntLvNumChan_MASK;
+               tmp >>= DF_CS_AON0_DramBaseAddress0__IntLvNumChan__SHIFT;
+               switch (tmp) {
+               case 0:
+               default:
+                       numchan = 1;
+                       break;
+               case 1:
+                       numchan = 2;
+                       break;
+               case 2:
+                       numchan = 0;
+                       break;
+               case 3:
+                       numchan = 4;
+                       break;
+               case 4:
+                       numchan = 0;
+                       break;
+               case 5:
+                       numchan = 8;
+                       break;
+               case 6:
+                       numchan = 0;
+                       break;
+               case 7:
+                       numchan = 16;
+                       break;
+               case 8:
+                       numchan = 2;
+                       break;
+               }
+               adev->mc.vram_width = numchan * chansize;
        }
-       adev->mc.vram_width = numchan * chansize;
 
        /* Could aper size report 0 ? */
        adev->mc.aper_base = pci_resource_start(adev->pdev, 0);