On Fri, 2017-04-28 at 12:44 +0000, Chauhan, Madhav wrote:
> > -----Original Message-----
> > From: Ander Conselvan De Oliveira [mailto:[email protected]]
> > Sent: Friday, April 28, 2017 2:28 PM
> > To: Chauhan, Madhav <[email protected]>; intel-
> > [email protected]
> > Cc: Deepak M <[email protected]>; Nikula, Jani <[email protected]>;
> > Vetter, Daniel <[email protected]>; Jani Nikula
> > <[email protected]>; [email protected]
> > Subject: Re: [PATCH] drm/i915/glk: Fix DSI "*ERROR* ULPS is still active"
> > messages
> >
> > On Fri, 2017-04-28 at 08:50 +0000, Chauhan, Madhav wrote:
> > > > -----Original Message-----
> > > > From: Conselvan De Oliveira, Ander
> > > > Sent: Friday, April 28, 2017 1:32 PM
> > > > To: [email protected]
> > > > Cc: Conselvan De Oliveira, Ander
> > > > <[email protected]>;
> > > > Deepak M <[email protected]>; Chauhan, Madhav
> > > > <[email protected]>; Nikula, Jani <[email protected]>;
> > > > Vetter, Daniel <[email protected]>; Jani Nikula
> > > > <[email protected]>; [email protected]
> > > > Subject: [PATCH] drm/i915/glk: Fix DSI "*ERROR* ULPS is still active"
> > > > messages
> > > >
> > > > The sequence in glk_dsi_device_ready() enters ULPS then waits until
> > > > it is
> > > > *not* active to then disable it. The correct sequence according to
> > > > the spec is to enter ULPS then wait until the GLK_ULPS_NOT_ACTIVE
> > > > bit is zero, i.e., ULPS is active, and then disable ULPS.
> > > >
> > > > Fixing the codition gets rid of the following spurious error messages:
> > >
> > > Please correct the typo error to "condition", otherwise looks good.
> > > Thanks for catching this.
> >
> > If you upgrade the above statement to a Reviewed-by, I can fix the typo
> > while
> > merging?
> >
> > Ander
> >
> > >
> > > >
> > > > [drm:glk_dsi_device_ready [i915]] *ERROR* ULPS is still active
> > > >
> > > > Fixes: 4644848369c0 ("drm/i915/glk: Add MIPIIO Enable/disable
> > > > sequence")
> > > > Cc: Deepak M <[email protected]>
> > > > Cc: Madhav Chauhan <[email protected]>
> > > > Cc: Jani Nikula <[email protected]>
> > > > Cc: Daniel Vetter <[email protected]>
> > > > Cc: Jani Nikula <[email protected]>
> > > > Cc: [email protected]
> > > > Cc: <[email protected]>
> > > > Signed-off-by: Ander Conselvan de Oliveira
> > > > <[email protected]>
>
> Reviewed-by: Madhav Chauhan <[email protected]>
Pushed with the typo fixed. Thanks for reviewing.
Ander
>
>
> > > > ---
> > > > drivers/gpu/drm/i915/intel_dsi.c | 7 +++----
> > > > 1 file changed, 3 insertions(+), 4 deletions(-)
> > > >
> > > > diff --git a/drivers/gpu/drm/i915/intel_dsi.c
> > > > b/drivers/gpu/drm/i915/intel_dsi.c
> > > > index 3ffe8b1..fc0ef49 100644
> > > > --- a/drivers/gpu/drm/i915/intel_dsi.c
> > > > +++ b/drivers/gpu/drm/i915/intel_dsi.c
> > > > @@ -410,11 +410,10 @@ static void glk_dsi_device_ready(struct
> > > > intel_encoder *encoder)
> > > > val |= (ULPS_STATE_ENTER | DEVICE_READY);
> > > > I915_WRITE(MIPI_DEVICE_READY(port), val);
> > > >
> > > > - /* Wait for ULPS Not active */
> > > > + /* Wait for ULPS active */
> > > > if (intel_wait_for_register(dev_priv,
> > > > - MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE,
> > > > - GLK_ULPS_NOT_ACTIVE, 20))
> > > > - DRM_ERROR("ULPS is still active\n");
> > > > + MIPI_CTRL(port), GLK_ULPS_NOT_ACTIVE, 0,
> > > > 20))
> > > > + DRM_ERROR("ULPS not active\n");
> > > >
> > > > /* Exit ULPS */
> > > > val = I915_READ(MIPI_DEVICE_READY(port));
> > > > --
> > > > 2.9.3
> > >
> > >
_______________________________________________
Intel-gfx mailing list
[email protected]
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
