redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

drm/i915: fix panel fitting filter coefficient select for Ironlake

Browse source 
Must set filter selection as hardcoded coefficients for medium 3x3
filtering, which matches vbios setting for Ironlake.

This fixes display corrupt issue on HP arrandale with new vbios.

Cc: Stable Team <stable@kernel.org>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang 2009-10-19 15:43:49 +08:00 committed by Eric Anholt
parent c038e51e84
commit b1f60b7029
2 changed files with 6 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
drivers/gpu/drm/i915/i915_reg.h
View file

@ -2039,6 +2039,11 @@
#define PFA_CTL_1 0x68080
#define PFB_CTL_1 0x68880
#define PF_ENABLE (1<<31)
#define PF_FILTER_MASK (3<<23)
#define PF_FILTER_PROGRAMMED (0<<23)
#define PF_FILTER_MED_3x3 (1<<23)
#define PF_FILTER_EDGE_ENHANCE (2<<23)
#define PF_FILTER_EDGE_SOFTEN (3<<23)
#define PFA_WIN_SZ 0x68074
#define PFB_WIN_SZ 0x68874
#define PFA_WIN_POS 0x68070

2
drivers/gpu/drm/i915/intel_display.c
View file

@ -1515,7 +1515,7 @@ static void igdng_crtc_dpms(struct drm_crtc *crtc, int mode)
/* Enable panel fitting for LVDS */
if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
temp = I915_READ(pf_ctl_reg);
I915_WRITE(pf_ctl_reg, temp | PF_ENABLE);
I915_WRITE(pf_ctl_reg, temp | PF_ENABLE | PF_FILTER_MED_3x3);
/* currently full aspect */
I915_WRITE(pf_win_pos, 0);