Currently, BXT_PP is hardcoded with value '0'.
It practically disabled eDP backlight on MRB (BXT) platform.
This patch will tell which BXT_PP registers (there are two set of PP_CONTROL in
the spec)
to be used as defined in VBT (Video Bios Timing table) and this will enabled eDP
backlight controller on MRB (BXT) platform.
v2:
- Remove unnecessary information in commit message
- Assign vbt.backlight.controller to a backlight_controller variable and return
the variable value.
Signed-off-by: Mustamin B Mustaffa <mustamin.b.musta...@intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 09f2744..e00569f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -640,19 +640,15 @@ static enum pipe vlv_find_free_pps(struct
drm_i915_private *dev_priv)
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
+ int backlight_controller = dev_priv->vbt.backlight.controller;
lockdep_assert_held(&dev_priv->pps_mutex);
/* We should never land here with regular DP ports */
WARN_ON(!is_edp(intel_dp));
- /*
- * TODO: BXT has 2 PPS instances. The correct port->PPS instance
- * mapping needs to be retrieved from VBT, for now just hard-code to
- * use instance #0 always.
- */
if (!intel_dp->pps_reset)
- return 0;
+ return backlight_controller;
intel_dp->pps_reset = false;
@@ -662,7 +658,7 @@ static enum pipe vlv_find_free_pps(struct drm_i915_private
*dev_priv)
*/
intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, false);
- return 0;
+ return backlight_controller;
}
typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
--
1.9.1
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