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| author | Paulo Zanoni <paulo.r.zanoni@intel.com> | 2013-04-08 22:48:08 +0400 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-04-18 11:43:31 +0400 |
| commit | dc4bd2d1095d0a7b45dcd23cc8a423a2952cbf4d (patch) | |
| tree | 45731ccd767235042da115ae002c8e6fba8a96df | |
| parent | 3f704fa2778d3fe45e6529825a5c7a8bcbc686f4 (diff) | |
| download | linux-dc4bd2d1095d0a7b45dcd23cc8a423a2952cbf4d.tar.xz | |
drm/i915: preserve the PBC bits of TRANS_CHICKEN2
Bits 30 and 24:0 are PBC, so don't zero them. Some of the other bits
are being zeroed, but I couldn't find a reason for this, so leave them
as they are for now to avoid regressions.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
[danvet: Delete the redudant #define that Imre spotted in his review.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 7 |
2 files changed, 11 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index fc8a4a940e92..31de7e4b1f3e 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3959,8 +3959,11 @@ #define _TRANSA_CHICKEN2 0xf0064 #define _TRANSB_CHICKEN2 0xf1064 #define TRANS_CHICKEN2(pipe) _PIPE(pipe, _TRANSA_CHICKEN2, _TRANSB_CHICKEN2) -#define TRANS_CHICKEN2_TIMING_OVERRIDE (1<<31) -#define TRANS_CHICKEN2_FDI_POLARITY_REVERSED (1<<29) +#define TRANS_CHICKEN2_TIMING_OVERRIDE (1<<31) +#define TRANS_CHICKEN2_FDI_POLARITY_REVERSED (1<<29) +#define TRANS_CHICKEN2_FRAME_START_DELAY_MASK (3<<27) +#define TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER (1<<26) +#define TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH (1<<25) #define SOUTH_CHICKEN1 0xc2000 #define FDIA_PHASE_SYNC_SHIFT_OVR 19 diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 6f67fa122f81..e34ad9642519 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3604,9 +3604,14 @@ static void cpt_init_clock_gating(struct drm_device *dev) * downward, on (only) LVDS of some HP laptops with IVY. */ for_each_pipe(pipe) { - val = TRANS_CHICKEN2_TIMING_OVERRIDE; + val = I915_READ(TRANS_CHICKEN2(pipe)); + val |= TRANS_CHICKEN2_TIMING_OVERRIDE; + val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED; if (dev_priv->fdi_rx_polarity_inverted) val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED; + val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK; + val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER; + val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH; I915_WRITE(TRANS_CHICKEN2(pipe), val); } /* WADP0ClockGatingDisable */ |