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drm/i915: Program Rcomp and band gap reset everytime we resume from power gate

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Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Shobhit Kumar 2014-04-09 13:59:30 +05:30 committed by Daniel Vetter
parent 113a047633
commit 2095f9fc06
1 changed files with 9 additions and 3 deletions
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12
drivers/gpu/drm/i915/intel_dsi.c
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@ -110,6 +110,15 @@ static void intel_dsi_device_ready(struct intel_encoder *encoder)
DRM_DEBUG_KMS("\n");
mutex_lock(&dev_priv->dpio_lock);
/* program rcomp for compliance, reduce from 50 ohms to 45 ohms
* needed everytime after power gate */
vlv_flisdsi_write(dev_priv, 0x04, 0x0004);
mutex_unlock(&dev_priv->dpio_lock);
/* bandgap reset is needed after everytime we do power gate */
band_gap_reset(dev_priv);
val = I915_READ(MIPI_PORT_CTRL(pipe));
I915_WRITE(MIPI_PORT_CTRL(pipe), val | LP_OUTPUT_HOLD);
usleep_range(1000, 1500);
@ -379,9 +388,6 @@ static void intel_dsi_mode_set(struct intel_encoder *intel_encoder)
DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
/* XXX: Location of the call */
band_gap_reset(dev_priv);
/* escape clock divider, 20MHz, shared for A and C. device ready must be
* off when doing this! txclkesc? */
tmp = I915_READ(MIPI_CTRL(0));