diff options
| author | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2016-03-16 10:57:15 +0000 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2016-03-21 11:40:11 -0700 |
| commit | 05dc698c2e5c9d4453f62fd1cd5acbc68bc97b0f (patch) | |
| tree | 56bc96f558247990cc7ff42e3364e4330665c20d /drivers/gpu/drm/i915/intel_color.c | |
| parent | 8563b1e8ef88c8bdb824ab1c00ebb7d66308fef0 (diff) | |
drm/i915: Do not read GAMMA_MODE register
Implement Daniel Stone's recommendation to not read registers to infer
the hardware's state.
v2: Read GAMMA_MODE register value at init (Matt Roper's comment)
v3: Read GAMMA_MODE register in intel_modeset_readout_hw_state along
with other registers (Matt Roper's comment).
v4: Mask GAMMA_MODE register with interesting bits when reading
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458125837-2576-3-git-send-email-lionel.g.landwerlin@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_color.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_color.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c index 35b7f62428fc..16657ebfbb43 100644 --- a/drivers/gpu/drm/i915/intel_color.c +++ b/drivers/gpu/drm/i915/intel_color.c @@ -121,6 +121,8 @@ static void haswell_load_luts(struct drm_crtc *crtc) struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + struct intel_crtc_state *intel_crtc_state = + to_intel_crtc_state(crtc->state); bool reenable_ips = false; /* @@ -128,11 +130,12 @@ static void haswell_load_luts(struct drm_crtc *crtc) * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. */ if (IS_HASWELL(dev) && intel_crtc->config->ips_enabled && - ((I915_READ(GAMMA_MODE(intel_crtc->pipe)) & GAMMA_MODE_MODE_MASK) == - GAMMA_MODE_MODE_SPLIT)) { + (intel_crtc_state->gamma_mode == GAMMA_MODE_MODE_SPLIT)) { hsw_disable_ips(intel_crtc); reenable_ips = true; } + + intel_crtc_state->gamma_mode = GAMMA_MODE_MODE_8BIT; I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT); i9xx_load_luts(crtc); |