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Commit 8624ecbf authored by Michel Dänzer's avatar Michel Dänzer Committed by Dave Airlie
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drm: radeon: implement RADEON_PARAM_SCRATCH_OFFSET getparam 



When this succeeds, userspace can read the scratch register contents from th    mapped writeback page directly.

Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent 9ca94161

drivers/char/drm/radeon_state.c

+5 −1
Original line number Diff line number Diff line
@@ -2987,7 +2987,11 @@ static int radeon_cp_getparam(DRM_IOCTL_ARGS) 
	case RADEON_PARAM_GART_TEX_HANDLE:

		value = dev_priv->gart_textures_offset;

		break;

	

	case RADEON_PARAM_SCRATCH_OFFSET:

		if (!dev_priv->writeback_works)

			return DRM_ERR(EINVAL);

		value = RADEON_SCRATCH_REG_OFFSET;

		break;

	case RADEON_PARAM_CARD_TYPE:

		if (dev_priv->flags & CHIP_IS_PCIE)

			value = RADEON_CARD_PCIE;