[Intel-gfx] [V4] drm/i915: Enable VBT based BL control for DP

[Ville Syrjälä]

On Wed, Feb 21, 2018 at 12:04:43AM +0000, Mustaffa, Mustamin B wrote:
> Hi Ville, 
> 
> Can you point out what makes you says the git diff is broken? 
> 
> Best regard 
> 
> Mustamin
> 
> 
> -----Original Message-----
> From: Ville Syrjälä [mailto:ville.syrjala at linux.intel.com] 
> Sent: Tuesday, February 20, 2018 10:26 PM
> To: Mustaffa, Mustamin B <mustamin.b.mustaffa at intel.com>
> Cc: intel-gfx at lists.freedesktop.org
> Subject: Re: [Intel-gfx] [V4] drm/i915: Enable VBT based BL control for DP
> 
> On Tue, Feb 20, 2018 at 05:42:59PM +0800, Mustamin B Mustaffa wrote:
> > 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.
> > v3:
> >  - Rebased to latest code base.
> >  - updated commit title.
> > V4:
> >  - Use sanitized panel backlight controller instead of vbt backlight
> >    controller
> > 
> > Signed-off-by: Mustamin B Mustaffa <mustamin.b.mustaffa at intel.com>
> > ---
> >  drivers/gpu/drm/i915/intel_dp.c | 11 ++++-------
> >  1 file changed, 4 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c 
> > b/drivers/gpu/drm/i915/intel_dp.c index 1868f73..f9b922d 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -655,18 +655,15 @@ static enum pipe vlv_find_free_pps(struct 
                                           ^^^^^^^^^^^^^^^^^

That is not the function you're patching here.

> > drm_i915_private *dev_priv)
> 
> Your git diff is clearly broken. This makes patch review harder than it has to be. Please consider updating to a non-broken version.
> 
> >  {
> >  	struct drm_i915_private *dev_priv = 
> > to_i915(intel_dp_to_dev(intel_dp));
> >  
> > +	int backlight_controller = 
> > +intel_dp->attached_connector->panel.backlight.controller;
> > +
> >  	lockdep_assert_held(&dev_priv->pps_mutex);
> >  
> >  	/* We should never land here with regular DP ports */
> >  	WARN_ON(!intel_dp_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;
> >  
> > @@ -676,7 +673,7 @@ static enum pipe vlv_find_free_pps(struct drm_i915_private *dev_priv)
> >  	 */
> >  	intel_dp_init_panel_power_sequencer_registers(intel_dp, false);
> >  
> > -	return 0;
> > +	return backlight_controller;
> >  }
> >  
> >  typedef bool (*vlv_pipe_check)(struct drm_i915_private *dev_priv,
> > --
> > 1.9.1
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> --
> Ville Syrjälä
> Intel OTC

-- 
Ville Syrjälä
Intel OTC