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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2014-08-15 01:21:54 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-09-03 11:05:04 +0200 |
| commit | 1038392b4dd02a46006d38f33aab71486d477ced (patch) | |
| tree | 85c124a5d85e72e904c792d3d20e707393e0c18f /drivers/gpu/drm/i915/i915_reg.h | |
| parent | 9d53910580512207186729c94b39cca9a9778c13 (diff) | |
| download | lwn-1038392b4dd02a46006d38f33aab71486d477ced.tar.gz lwn-1038392b4dd02a46006d38f33aab71486d477ced.zip | |
drm/i915: Disable trickle feed for gen2/3
My 830 is unhappy with trickle feed enabled. The symptom is that
the image on the screen shifts a bit to right occasionally.
The BIOS initially disables trickle feed, but it gets reset during
suspend, so we need to re-disable it ourselves. Juse disable it
always.
Also disable it for all other gen2/3 platforms since we disable it
for all more recent platforms as well (until HSW that is). At least
my 855 doesn't seem to mind us doing this. I don't have gen3
hardware to test that.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 20673cc450c8..b7b2e63c14d0 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1272,6 +1272,10 @@ enum punit_power_well { #define INSTPM_TLB_INVALIDATE (1<<9) #define INSTPM_SYNC_FLUSH (1<<5) #define ACTHD 0x020c8 +#define MEM_MODE 0x020cc +#define MEM_DISPLAY_B_TRICKLE_FEED_DISABLE (1<<3) /* 830 only */ +#define MEM_DISPLAY_A_TRICKLE_FEED_DISABLE (1<<2) /* 830/845 only */ +#define MEM_DISPLAY_TRICKLE_FEED_DISABLE (1<<2) /* 85x only */ #define FW_BLC 0x020d8 #define FW_BLC2 0x020dc #define FW_BLC_SELF 0x020e0 /* 915+ only */ |