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drm/i915/lvds: Unlock the PP register when panel-fitting 

As we do not wait for the panel to turn off when we need to adjust the
panel-fitting registers we also need to unlock the PLLs as with the
non-pfit update path.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
hifive-unleashed-5.1
Chris Wilson 2010-09-21 14:06:12 +01:00
parent a6b17b4367
commit 4fd21dc8ee
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/intel_lvds.c
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@ -97,6 +97,7 @@ static void intel_lvds_set_power(struct intel_lvds *intel_lvds, bool on)
DRM_ERROR("timed out waiting for panel to power off\n");
I915_WRITE(PFIT_CONTROL, 0);
intel_lvds->pfit_control = 0;
intel_lvds->pfit_dirty = false;
}
I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
@ -377,8 +378,8 @@ static void intel_lvds_prepare(struct drm_encoder *encoder)
I915_READ(PCH_PP_CONTROL) | PANEL_UNLOCK_REGS);
} else if (intel_lvds->pfit_dirty) {
I915_WRITE(PP_CONTROL,
I915_READ(PP_CONTROL) & ~POWER_TARGET_ON);
I915_WRITE(LVDS, I915_READ(LVDS) & ~LVDS_PORT_EN);
(I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS)
& ~POWER_TARGET_ON);
} else {
I915_WRITE(PP_CONTROL,
I915_READ(PP_CONTROL) | PANEL_UNLOCK_REGS);
@ -438,6 +439,9 @@ static void intel_lvds_mode_set(struct drm_encoder *encoder,
* screen. Should be enabled before the pipe is enabled, according to
* register description and PRM.
*/
DRM_DEBUG_KMS("applying panel-fitter: %x, %x\n",
intel_lvds->pfit_control,
intel_lvds->pfit_pgm_ratios);
if (wait_for((I915_READ(PP_STATUS) & PP_ON) == 0, 1000))
DRM_ERROR("timed out waiting for panel to power off\n");