diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_asic.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_asic.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c index f533df5f7d50..973417c4b014 100644 --- a/drivers/gpu/drm/radeon/radeon_asic.c +++ b/drivers/gpu/drm/radeon/radeon_asic.c @@ -40,6 +40,16 @@ /* * Registers accessors functions. */ +/** + * radeon_invalid_rreg - dummy reg read function + * + * @rdev: radeon device pointer + * @reg: offset of register + * + * Dummy register read function. Used for register blocks + * that certain asics don't have (all asics). + * Returns the value in the register. + */ static uint32_t radeon_invalid_rreg(struct radeon_device *rdev, uint32_t reg) { DRM_ERROR("Invalid callback to read register 0x%04X\n", reg); @@ -47,6 +57,16 @@ static uint32_t radeon_invalid_rreg(struct radeon_device *rdev, uint32_t reg) return 0; } +/** + * radeon_invalid_wreg - dummy reg write function + * + * @rdev: radeon device pointer + * @reg: offset of register + * @v: value to write to the register + * + * Dummy register read function. Used for register blocks + * that certain asics don't have (all asics). + */ static void radeon_invalid_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v) { DRM_ERROR("Invalid callback to write register 0x%04X with 0x%08X\n", @@ -54,6 +74,14 @@ static void radeon_invalid_wreg(struct radeon_device *rdev, uint32_t reg, uint32 BUG_ON(1); } +/** + * radeon_register_accessor_init - sets up the register accessor callbacks + * + * @rdev: radeon device pointer + * + * Sets up the register accessor callbacks for various register + * apertures. Not all asics have all apertures (all asics). + */ static void radeon_register_accessor_init(struct radeon_device *rdev) { rdev->mc_rreg = &radeon_invalid_rreg; @@ -102,6 +130,14 @@ static void radeon_register_accessor_init(struct radeon_device *rdev) /* helper to disable agp */ +/** + * radeon_agp_disable - AGP disable helper function + * + * @rdev: radeon device pointer + * + * Removes AGP flags and changes the gart callbacks on AGP + * cards when using the internal gart rather than AGP (all asics). + */ void radeon_agp_disable(struct radeon_device *rdev) { rdev->flags &= ~RADEON_IS_AGP; @@ -1608,6 +1644,16 @@ static struct radeon_asic si_asic = { }, }; +/** + * radeon_asic_init - register asic specific callbacks + * + * @rdev: radeon device pointer + * + * Registers the appropriate asic specific callbacks for each + * chip family. Also sets other asics specific info like the number + * of crtcs and the register aperture accessors (all asics). + * Returns 0 for success. + */ int radeon_asic_init(struct radeon_device *rdev) { radeon_register_accessor_init(rdev); |