> -----Original Message----- > From: Ander Conselvan De Oliveira [mailto:conselvan2@xxxxxxxxx] > Sent: Friday, April 28, 2017 2:28 PM > To: Chauhan, Madhav <madhav.chauhan@xxxxxxxxx>; intel- > gfx@xxxxxxxxxxxxxxxxxxxxx > Cc: Deepak M <m.deepak@xxxxxxxxx>; Nikula, Jani <jani.nikula@xxxxxxxxx>; > Vetter, Daniel <daniel.vetter@xxxxxxxxx>; Jani Nikula > <jani.nikula@xxxxxxxxxxxxxxx>; drm-intel-fixes@xxxxxxxxxxxxxxxxxxxxx > 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: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > > > Cc: Conselvan De Oliveira, Ander > > > <ander.conselvan.de.oliveira@xxxxxxxxx>; > > > Deepak M <m.deepak@xxxxxxxxx>; Chauhan, Madhav > > > <madhav.chauhan@xxxxxxxxx>; Nikula, Jani <jani.nikula@xxxxxxxxx>; > > > Vetter, Daniel <daniel.vetter@xxxxxxxxx>; Jani Nikula > > > <jani.nikula@xxxxxxxxxxxxxxx>; drm-intel-fixes@xxxxxxxxxxxxxxxxxxxxx > > > 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 <m.deepak@xxxxxxxxx> > > > Cc: Madhav Chauhan <madhav.chauhan@xxxxxxxxx> > > > Cc: Jani Nikula <jani.nikula@xxxxxxxxx> > > > Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx> > > > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > > > Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > > > Cc: <drm-intel-fixes@xxxxxxxxxxxxxxxxxxxxx> > > > Signed-off-by: Ander Conselvan de Oliveira > > > <ander.conselvan.de.oliveira@xxxxxxxxx> Reviewed-by: Madhav Chauhan <madhav.chauhan@xxxxxxxxx> > > > --- > > > 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 Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
