diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-08-19 11:39:27 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-08-30 16:31:01 -0400 |
| commit | bc01a8c7a24169f8b111b7dda6f5d8e7088309af (patch) | |
| tree | 022c589678297c15a2577693ee2cd798377419b8 | |
| parent | 290d24576ccf1aa0373d2185cedfe262d0d4952a (diff) | |
| download | linux-bc01a8c7a24169f8b111b7dda6f5d8e7088309af.tar.bz2 | |
drm/radeon: update line buffer allocation for dce8
We need to allocate line buffer to each display when
setting up the watermarks. Failure to do so can lead
to a blank screen. This fixes blank screen problems
on dce8 asics.
Based on an initial fix from:
Jay Cornwall <jay.cornwall@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/radeon/cik.c | 29 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/cikd.h | 4 |
2 files changed, 26 insertions, 7 deletions
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index 582f8e4f36d4..1942571496ea 100644 --- a/drivers/gpu/drm/radeon/cik.c +++ b/drivers/gpu/drm/radeon/cik.c @@ -7367,8 +7367,8 @@ static u32 dce8_line_buffer_adjust(struct radeon_device *rdev, struct radeon_crtc *radeon_crtc, struct drm_display_mode *mode) { - u32 tmp; - + u32 tmp, buffer_alloc, i; + u32 pipe_offset = radeon_crtc->crtc_id * 0x20; /* * Line Buffer Setup * There are 6 line buffers, one for each display controllers. @@ -7378,22 +7378,37 @@ static u32 dce8_line_buffer_adjust(struct radeon_device *rdev, * them using the stereo blender. */ if (radeon_crtc->base.enabled && mode) { - if (mode->crtc_hdisplay < 1920) + if (mode->crtc_hdisplay < 1920) { tmp = 1; - else if (mode->crtc_hdisplay < 2560) + buffer_alloc = 2; + } else if (mode->crtc_hdisplay < 2560) { tmp = 2; - else if (mode->crtc_hdisplay < 4096) + buffer_alloc = 2; + } else if (mode->crtc_hdisplay < 4096) { tmp = 0; - else { + buffer_alloc = (rdev->flags & RADEON_IS_IGP) ? 2 : 4; + } else { DRM_DEBUG_KMS("Mode too big for LB!\n"); tmp = 0; + buffer_alloc = (rdev->flags & RADEON_IS_IGP) ? 2 : 4; } - } else + } else { tmp = 1; + buffer_alloc = 0; + } WREG32(LB_MEMORY_CTRL + radeon_crtc->crtc_offset, LB_MEMORY_CONFIG(tmp) | LB_MEMORY_SIZE(0x6B0)); + WREG32(PIPE0_DMIF_BUFFER_CONTROL + pipe_offset, + DMIF_BUFFERS_ALLOCATED(buffer_alloc)); + for (i = 0; i < rdev->usec_timeout; i++) { + if (RREG32(PIPE0_DMIF_BUFFER_CONTROL + pipe_offset) & + DMIF_BUFFERS_ALLOCATED_COMPLETED) + break; + udelay(1); + } + if (radeon_crtc->base.enabled && mode) { switch (tmp) { case 0: diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h index 6a92f491cb91..203d2a09a1f5 100644 --- a/drivers/gpu/drm/radeon/cikd.h +++ b/drivers/gpu/drm/radeon/cikd.h @@ -393,6 +393,10 @@ #define DMIF_ADDR_CALC 0xC00 +#define PIPE0_DMIF_BUFFER_CONTROL 0x0ca0 +# define DMIF_BUFFERS_ALLOCATED(x) ((x) << 0) +# define DMIF_BUFFERS_ALLOCATED_COMPLETED (1 << 4) + #define SRBM_GFX_CNTL 0xE44 #define PIPEID(x) ((x) << 0) #define MEID(x) ((x) << 2) |