2.6.31-stable review patch. If anyone has any objections, please let us know. ------------------ From: Zhenyu Wang commit b1f60b7029989da71fd8ea1b1176480fac9e846c upstream. 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. Signed-off-by: Zhenyu Wang Signed-off-by: Eric Anholt Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/i915_reg.h | 5 +++++ drivers/gpu/drm/i915/intel_display.c | 2 +- 2 files changed, 6 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1871,6 +1871,11 @@ #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 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1213,7 +1213,7 @@ static void igdng_crtc_dpms(struct drm_c /* 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/