From: Michel Dänzer <daen...@vmware.com>
The hook may change the number of bytes per pixel being scanned out, which
affects the CRTC memory bandwidth requirements. E.g. booting in 8bpp and then
running X in 32bpp would result in the bandwidth requirements being
underestimated for the latter and consequently in CRTC FIFO underruns causing
visible artifacts with 3D intensive workloads.
ATOM changes only compile-tested.
Signed-off-by: Michel Dänzer <daen...@vmware.com>
---
drivers/gpu/drm/radeon/atombios_crtc.c | 5 ++++-
drivers/gpu/drm/radeon/radeon_legacy_crtc.c | 7 ++++---
2 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c
b/drivers/gpu/drm/radeon/atombios_crtc.c
index 14fa970..38a87cc 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -563,6 +563,10 @@ int atombios_crtc_set_base(struct drm_crtc *crtc, int x,
int y,
radeon_fb = to_radeon_framebuffer(old_fb);
radeon_gem_object_unpin(radeon_fb->obj);
}
+
+ /* Bytes per pixel may have changed */
+ radeon_bandwidth_update(rdev);
+
return 0;
}
@@ -701,7 +705,6 @@ int atombios_crtc_mode_set(struct drm_crtc *crtc,
}
atombios_overscan_setup(crtc, mode, adjusted_mode);
atombios_scaler_setup(crtc);
- radeon_bandwidth_update(rdev);
return 0;
}
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index 36410f8..ec2df73 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -532,6 +532,10 @@ int radeon_crtc_set_base(struct drm_crtc *crtc, int x, int
y,
radeon_fb = to_radeon_framebuffer(old_fb);
radeon_gem_object_unpin(radeon_fb->obj);
}
+
+ /* Bytes per pixel may have changed */
+ radeon_bandwidth_update(rdev);
+
return 0;
}
@@ -1015,14 +1019,11 @@ static int radeon_crtc_mode_set(struct drm_crtc *crtc,
int x, int y, struct drm_framebuffer *old_fb)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
- struct drm_device *dev = crtc->dev;
- struct radeon_device *rdev = dev->dev_private;
/* TODO TV */
radeon_crtc_set_base(crtc, x, y, old_fb);
radeon_set_crtc_timing(crtc, adjusted_mode);
radeon_set_pll(crtc, adjusted_mode);
- radeon_bandwidth_update(rdev);
if (radeon_crtc->crtc_id == 0) {
radeon_legacy_rmx_mode_set(crtc, mode, adjusted_mode);
} else {
--
1.6.4.3
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