On Fri, 2018-10-05 at 12:53 -0700, Souza, Jose wrote: > On Fri, 2018-10-05 at 10:51 -0700, Dhinakaran Pandiyan wrote: > > On Fri, 2018-10-05 at 10:38 -0700, Rodrigo Vivi wrote: > > > On Thu, Oct 04, 2018 at 08:01:30PM -0700, Dhinakaran Pandiyan > > > wrote: > > > > PSR2 sinks that require Y coordinates for selective update also > > > > need the > > > > Y coordinate Valid bit in VSC SDP. > > > > Spec: eDP 1.4b VSC payload extension for PSR2 operation (Table > > > > 6- > > > > 12) > > > > > > I couldn't get any meaningful information about Y coordinate > > > valid > > > bit > > > looking at this table... > > > > > > what am I missing? > > > > " > > Y-Coordinate_Valid > > If the Sink device indicates that Y-coordinate is required, the > > Source > > device must program HB2 (VSC Revision Number) to 04h or 05h. > > Additionally, the Source device must set this bit to 1 to indicate > > that > > the Y-coordinate provided in DB12 through DB13 is valid. However, > > if > > the Y-coordinate provided in DB12 through DB13 is not valid, this > > bit > > must be cleared to 0 (this includes when DB12 through DB13 are not > > set > > and remain at a default value of 0000h, because a Y-coordinate > > value > > of > > 0000h represents the first active video line)." > > > > We enable PSR2 only when the sink says Y-coordinate is required and > > the > > hardware needs to be told to send Y coordinate valid bit in the VSC > > packets for such sinks. > > > > > > > > Signed-off-by: Dhinakaran Pandiyan < > > > > dhinakaran.pandiyan@xxxxxxxxx > > > > > > > > > > > > > --- > > > > drivers/gpu/drm/i915/intel_psr.c | 2 +- > > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > > > diff --git a/drivers/gpu/drm/i915/intel_psr.c > > > > b/drivers/gpu/drm/i915/intel_psr.c > > > > index 105b7ea2cd98..92672954dfef 100644 > > > > --- a/drivers/gpu/drm/i915/intel_psr.c > > > > +++ b/drivers/gpu/drm/i915/intel_psr.c > > > > @@ -431,7 +431,7 @@ static void hsw_activate_psr2(struct > > > > intel_dp > > > > *intel_dp) > > > > * good enough. */ > > > > val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE; > > > > if (INTEL_GEN(dev_priv) >= 10 || > > > > IS_GEMINILAKE(dev_priv)) > > > > - val |= EDP_Y_COORDINATE_ENABLE; > > > > + val |= EDP_Y_COORDINATE_ENABLE | > > > > EDP_Y_COORDINATE_VALID; > > > > > > But also, this seems to be doing the opposite what you wrote on > > > the > > > commit message since this bit means: > > > > > > "Do not include Y-coordinate valid eDP 1.4" (Bspec: 7713) > > > > Oops! You are right, the bit name threw me off. > > When I added this bit I first named it "EDP_Y_COORDINATE_INVALID" but > was decided to go back to BSpec name. I remember it now, something like EDP_Y_COORDINATE_VALID_DISABLE would be more appropriate. -DK _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
