This eliminates a fairly long delay when power sequencing newer hardware Signed-off-by: Keith Packard <keithp@xxxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp.c | 51 +++++++++++++++++++++++---------------- 1 files changed, 30 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 7120ba7..f223504 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -986,10 +986,12 @@ static void ironlake_edp_panel_on (struct intel_dp *intel_dp) pp &= ~PANEL_UNLOCK_MASK; pp |= PANEL_UNLOCK_REGS; - /* ILK workaround: disable reset around power sequence */ - pp &= ~PANEL_POWER_RESET; - I915_WRITE(PCH_PP_CONTROL, pp); - POSTING_READ(PCH_PP_CONTROL); + if (IS_GEN5(dev)) { + /* ILK workaround: disable reset around power sequence */ + pp &= ~PANEL_POWER_RESET; + I915_WRITE(PCH_PP_CONTROL, pp); + POSTING_READ(PCH_PP_CONTROL); + } pp |= POWER_TARGET_ON; I915_WRITE(PCH_PP_CONTROL, pp); @@ -1000,9 +1002,11 @@ static void ironlake_edp_panel_on (struct intel_dp *intel_dp) DRM_ERROR("panel on wait timed out: 0x%08x\n", I915_READ(PCH_PP_STATUS)); - pp |= PANEL_POWER_RESET; /* restore panel reset bit */ - I915_WRITE(PCH_PP_CONTROL, pp); - POSTING_READ(PCH_PP_CONTROL); + if (IS_GEN5(dev)) { + pp |= PANEL_POWER_RESET; /* restore panel reset bit */ + I915_WRITE(PCH_PP_CONTROL, pp); + POSTING_READ(PCH_PP_CONTROL); + } } static void ironlake_edp_panel_off_sync(struct intel_dp *intel_dp) @@ -1019,23 +1023,28 @@ static void ironlake_edp_panel_off_sync(struct intel_dp *intel_dp) pp &= ~PANEL_UNLOCK_MASK; pp |= PANEL_UNLOCK_REGS; - /* ILK workaround: disable reset around power sequence */ - pp &= ~PANEL_POWER_RESET; - I915_WRITE(PCH_PP_CONTROL, pp); - POSTING_READ(PCH_PP_CONTROL); + if (IS_GEN5(dev)) { + /* ILK workaround: disable reset around power sequence */ + pp &= ~PANEL_POWER_RESET; + I915_WRITE(PCH_PP_CONTROL, pp); + POSTING_READ(PCH_PP_CONTROL); + } - pp &= ~POWER_TARGET_ON; - I915_WRITE(PCH_PP_CONTROL, pp); - POSTING_READ(PCH_PP_CONTROL); + intel_dp->panel_off_jiffies = jiffies; - if (wait_for((I915_READ(PCH_PP_STATUS) & idle_off_mask) == 0, 5000)) - DRM_ERROR("panel off wait timed out: 0x%08x\n", - I915_READ(PCH_PP_STATUS)); + if (IS_GEN5(dev)) { + pp &= ~POWER_TARGET_ON; + I915_WRITE(PCH_PP_CONTROL, pp); + POSTING_READ(PCH_PP_CONTROL); - pp |= PANEL_POWER_RESET; /* restore panel reset bit */ - I915_WRITE(PCH_PP_CONTROL, pp); - POSTING_READ(PCH_PP_CONTROL); - intel_dp->panel_off_jiffies = jiffies; + if (wait_for((I915_READ(PCH_PP_STATUS) & idle_off_mask) == 0, 5000)) + DRM_ERROR("panel off wait timed out: 0x%08x\n", + I915_READ(PCH_PP_STATUS)); + + pp |= PANEL_POWER_RESET; /* restore panel reset bit */ + I915_WRITE(PCH_PP_CONTROL, pp); + POSTING_READ(PCH_PP_CONTROL); + } } static void ironlake_edp_panel_off(struct drm_encoder *encoder, bool sync) -- 1.7.6.3 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel