diff options
| author | Samuel Li <samuel.li@amd.com> | 2013-04-09 01:25:47 +0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-04-09 18:31:31 +0400 |
| commit | a0a53aa8c7b491a43e2ef66786f9511bae8cbc35 (patch) | |
| tree | ba99c19682038634fece39989fef348baaebab1b /drivers/gpu/drm/radeon/radeon_drv.c | |
| parent | 7c1c7c18fc752b2a1d07597286467ef186312463 (diff) | |
| download | linux-a0a53aa8c7b491a43e2ef66786f9511bae8cbc35.tar.xz | |
drm/radeon: Use direct mapping for fast fb access on RS690
This patch allows the CPU to map the stolen vram segment
directly rather than going through the PCI BAR. This
significantly improves performance for certain workloads with
a properly patched ddx.
Use radeon.fastfb=1 to enable it (disabled by default).
Currently only supported on RS690, but support for RS780/880
and newer APUs may be added eventually.
Signed-off-by: Samuel Li <samuel.li@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_drv.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_drv.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 66a7f0fd9620..b500bbc3e411 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -71,9 +71,10 @@ * 2.28.0 - r600-eg: Add MEM_WRITE packet support * 2.29.0 - R500 FP16 color clear registers * 2.30.0 - fix for FMASK texturing + * 2.31.0 - Add fastfb support for rs690 */ #define KMS_DRIVER_MAJOR 2 -#define KMS_DRIVER_MINOR 30 +#define KMS_DRIVER_MINOR 31 #define KMS_DRIVER_PATCHLEVEL 0 int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags); int radeon_driver_unload_kms(struct drm_device *dev); @@ -160,6 +161,7 @@ int radeon_hw_i2c = 0; int radeon_pcie_gen2 = -1; int radeon_msi = -1; int radeon_lockup_timeout = 10000; +int radeon_fastfb = 0; MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers"); module_param_named(no_wb, radeon_no_wb, int, 0444); @@ -212,6 +214,9 @@ module_param_named(msi, radeon_msi, int, 0444); MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (defaul 10000 = 10 seconds, 0 = disable)"); module_param_named(lockup_timeout, radeon_lockup_timeout, int, 0444); +MODULE_PARM_DESC(fastfb, "Direct FB access for IGP chips (0 = disable, 1 = enable)"); +module_param_named(fastfb, radeon_fastfb, int, 0444); + static struct pci_device_id pciidlist[] = { radeon_PCI_IDS }; |