[Intel-gfx] [PATCH] drm/i915/display: Fix mode private_flags comparison at atomic_check

[Shankar, Uma]

> -----Original Message-----
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Sent: Thursday, March 26, 2020 9:47 PM
> To: Shankar, Uma <uma.shankar at intel.com>
> Cc: intel-gfx at lists.freedesktop.org; Maarten Lankhorst
> <maarten.lankhorst at linux.intel.com>; Kai Vehmanen
> <kai.vehmanen at linux.intel.com>; Souza; Souza, Jose <jose.souza at intel.com>;
> Khor, Swee Aun <swee.aun.khor at intel.com>
> Subject: Re: [PATCH] drm/i915/display: Fix mode private_flags comparison at
> atomic_check
> 
> On Thu, Mar 26, 2020 at 01:19:28PM +0530, Uma Shankar wrote:
> > This patch fixes the private_flags of mode to be checked and compared
> > against uapi.mode and not from hw.mode. This helps properly trigger
> > modeset at boot if desired by driver.
> >
> > It helps resolve audio_codec initialization issues if display is
> > connected at boot. Initial discussion on this issue has happened on
> > below thread:
> > https://patchwork.freedesktop.org/series/74828/
> >
> > Fixes: https://gitlab.freedesktop.org/drm/intel/issues/1363
> >
> > Cc: Ville Syrjä <ville.syrjala at linux.intel.com>
> > Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> > Cc: Kai Vehmanen <kai.vehmanen at linux.intel.com>
> > Cc: Souza, Jose <jose.souza at intel.com>
> > Suggested-by: Ville Syrjä <ville.syrjala at linux.intel.com>
> 
> No one by that name here.

Copied this from an existing reference, not sure how some characters
got messed up ☹

> > Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> > Signed-off-by: SweeAun Khor <swee.aun.khor at intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_display.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index fe55c7c713f1..e630429af2c0 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -14747,8 +14747,8 @@ static int intel_atomic_check(struct drm_device *dev,
> >  	/* Catch I915_MODE_FLAG_INHERITED */
> >  	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> >  					    new_crtc_state, i) {
> > -		if (new_crtc_state->hw.mode.private_flags !=
> > -		    old_crtc_state->hw.mode.private_flags)
> > +		if (new_crtc_state->uapi.mode.private_flags !=
> > +		    old_crtc_state->uapi.mode.private_flags)
> >  			new_crtc_state->uapi.mode_changed = true;
> >  	}
> >
> > --
> > 2.22.0
> 
> --
> Ville Syrjälä
> Intel