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| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-07-22 13:18:18 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2010-07-26 11:27:03 -0700 |
| commit | 4a655f043160eeae447efd3be297b6b4c397a640 (patch) | |
| tree | 7332d15be37e4ca939a83f3ca223f93c70813359 /drivers/gpu | |
| parent | 6ba770dc5c334aff1c055c8728d34656e0f091e2 (diff) | |
| download | linux-4a655f043160eeae447efd3be297b6b4c397a640.tar.gz linux-4a655f043160eeae447efd3be297b6b4c397a640.tar.bz2 linux-4a655f043160eeae447efd3be297b6b4c397a640.zip | |
drm/i915: add PANEL_UNLOCK_REGS definition
In some cases, unlocking the panel regs is safe and can help us avoid a
flickery, full mode set sequence. So define the unlock key and use it.
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 6 |
2 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 150400f40534..c41f945283ab 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2805,6 +2805,7 @@ #define PCH_PP_STATUS 0xc7200 #define PCH_PP_CONTROL 0xc7204 +#define PANEL_UNLOCK_REGS (0xabcd << 16) #define EDP_FORCE_VDD (1 << 3) #define EDP_BLC_ENABLE (1 << 2) #define PANEL_POWER_RESET (1 << 1) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f28691f9742a..6d5477c5df04 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4413,7 +4413,8 @@ static void intel_increase_pllclock(struct drm_crtc *crtc, bool schedule) DRM_DEBUG_DRIVER("upclocking LVDS\n"); /* Unlock panel regs */ - I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | (0xabcd << 16)); + I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | + PANEL_UNLOCK_REGS); dpll &= ~DISPLAY_RATE_SELECT_FPA1; I915_WRITE(dpll_reg, dpll); @@ -4456,7 +4457,8 @@ static void intel_decrease_pllclock(struct drm_crtc *crtc) DRM_DEBUG_DRIVER("downclocking LVDS\n"); /* Unlock panel regs */ - I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | (0xabcd << 16)); + I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | + PANEL_UNLOCK_REGS); dpll |= DISPLAY_RATE_SELECT_FPA1; I915_WRITE(dpll_reg, dpll); |