From 8624ecbf68e90e5a8124514a0b7f92767fb80a62 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Michel=20D=C3=A4nzer?= Date: Mon, 7 Aug 2006 20:33:57 +1000 Subject: [PATCH] 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: Dave Airlie --- drivers/char/drm/radeon_state.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/char/drm/radeon_state.c b/drivers/char/drm/radeon_state.c index 99589fe0032..0433ff80cb7 100644 --- a/drivers/char/drm/radeon_state.c +++ b/drivers/char/drm/radeon_state.c @@ -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; -- 2.11.4.GIT