On Thu, Apr 27, 2017 at 02:49:55PM +0300, Ville Syrjälä wrote:
> On Thu, Apr 27, 2017 at 11:36:54AM +0300, Imre Deak wrote:
> > An error from intel_get_pipe_from_connector() would mean a bug somewhere
> > else, but we still should check for it to prevent some other more
> > obscure bug later.
> >
> > v2:
> > - Fall back to a reasonable default instead of bailing out in case of
> > error. (Jani)
> > v3:
> > - Fix s/PIPE_INVALID/INVALID_PIPE/ typo. (Jani)
> >
> > Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> > Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/intel_panel.c | 17 ++++++++++++++---
> > 1 file changed, 14 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
> > index cb50c52..d1abbf1 100644
> > --- a/drivers/gpu/drm/i915/intel_panel.c
> > +++ b/drivers/gpu/drm/i915/intel_panel.c
> > @@ -888,10 +888,14 @@ static void pch_enable_backlight(struct intel_connector *connector)
> > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > struct intel_panel *panel = &connector->panel;
> > enum pipe pipe = intel_get_pipe_from_connector(connector);
> > - enum transcoder cpu_transcoder =
> > - intel_pipe_to_cpu_transcoder(dev_priv, pipe);
> > + enum transcoder cpu_transcoder;
> > u32 cpu_ctl2, pch_ctl1, pch_ctl2;
> >
> > + if (!WARN_ON_ONCE(pipe == INVALID_PIPE))
> > + cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv, pipe);
> > + else
> > + cpu_transcoder = TRANSCODER_EDP;
> > +
> > cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
> > if (cpu_ctl2 & BLM_PWM_ENABLE) {
> > DRM_DEBUG_KMS("cpu backlight already enabled\n");
> > @@ -973,6 +977,9 @@ static void i965_enable_backlight(struct intel_connector *connector)
> > enum pipe pipe = intel_get_pipe_from_connector(connector);
> > u32 ctl, ctl2, freq;
> >
> > + if (WARN_ON_ONCE(pipe == INVALID_PIPE))
> > + pipe = PIPE_A;
> > +
> > ctl2 = I915_READ(BLC_PWM_CTL2);
> > if (ctl2 & BLM_PWM_ENABLE) {
> > DRM_DEBUG_KMS("backlight already enabled\n");
> > @@ -1037,6 +1044,9 @@ static void bxt_enable_backlight(struct intel_connector *connector)
> > enum pipe pipe = intel_get_pipe_from_connector(connector);
> > u32 pwm_ctl, val;
> >
> > + if (WARN_ON_ONCE(pipe) == INVALID_PIPE)
> ^
>
> Isn't that thing in the wrong place?
Yes, thanks for catching it.
>
> > + pipe = PIPE_A;
> > +
> > /* Controller 1 uses the utility pin. */
> > if (panel->backlight.controller == 1) {
> > val = I915_READ(UTIL_PIN_CTL);
> > @@ -1093,7 +1103,8 @@ void intel_panel_enable_backlight(struct intel_connector *connector)
> > if (!panel->backlight.present)
> > return;
> >
> > - DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
> > + if (!WARN_ON_ONCE(pipe == INVALID_PIPE))
> > + DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
> >
> > mutex_lock(&dev_priv->backlight_lock);
> >
> > --
> > 2.5.0
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ville Syrjälä
> Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
