diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c index 80054f36e487..93861f9c7773 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c @@ -964,6 +964,25 @@ static int gmc_v7_0_late_init(void *handle) return 0; } +static unsigned gmc_v7_0_get_vbios_fb_size(struct amdgpu_device *adev) +{ + u32 d1vga_control = RREG32(mmD1VGA_CONTROL); + unsigned size; + + if (REG_GET_FIELD(d1vga_control, D1VGA_CONTROL, D1VGA_MODE_ENABLE)) { + size = 9 * 1024 * 1024; /* reserve 8MB for vga emulator and 1 MB for FB */ + } else { + u32 viewport = RREG32(mmVIEWPORT_SIZE); + size = (REG_GET_FIELD(viewport, VIEWPORT_SIZE, VIEWPORT_HEIGHT) * + REG_GET_FIELD(viewport, VIEWPORT_SIZE, VIEWPORT_WIDTH) * + 4); + } + /* return 0 if the pre-OS buffer uses up most of vram */ + if ((adev->gmc.real_vram_size - size) < (8 * 1024 * 1024)) + return 0; + return size; +} + static int gmc_v7_0_sw_init(void *handle) { int r; @@ -998,8 +1017,6 @@ static int gmc_v7_0_sw_init(void *handle) */ adev->gmc.mc_mask = 0xffffffffffULL; /* 40 bit MC */ - adev->gmc.stolen_size = 256 * 1024; - /* set DMA mask + need_dma32 flags. * PCIE - can handle 40-bits. * IGP - can handle 40-bits @@ -1030,6 +1047,8 @@ static int gmc_v7_0_sw_init(void *handle) if (r) return r; + adev->gmc.stolen_size = gmc_v7_0_get_vbios_fb_size(adev); + /* Memory manager */ r = amdgpu_bo_init(adev); if (r) |