On Fri, 2018-03-23 at 15:59 -0700, Pandiyan, Dhinakaran wrote:
>
>
> On Thu, 2018-03-22 at 14:48 -0700, José Roberto de Souza wrote:
> > Move to only one place the sink requirements that the actual driver
> > needs to enable PSR2.
> >
> > Also intel_psr2_config_valid() is called every time the crtc config
> > is computed, wasting some time every time it was checking for
> > Y coordinate requirement.
> >
> > This allow us to nuke y_cord_support and some of VSC setup code
> > that
> > was handling a scenario that would never happen(PSR2 without Y
> > coordinate).
> >
> > Cc: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
> > Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> > Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
> > ---
> > drivers/gpu/drm/i915/i915_drv.h | 1 -
> > drivers/gpu/drm/i915/intel_psr.c | 46 +++++++++++++++++-----------
> > ------------
> > 2 files changed, 19 insertions(+), 28 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h
> > b/drivers/gpu/drm/i915/i915_drv.h
> > index 7fe00509e51a..cce32686fd75 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -603,7 +603,6 @@ struct i915_psr {
> > unsigned busy_frontbuffer_bits;
> > bool psr2_support;
> > bool link_standby;
> > - bool y_cord_support;
> > bool colorimetry_support;
> > bool alpm;
> > bool has_hw_tracking;
> > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> > b/drivers/gpu/drm/i915/intel_psr.c
> > index d46320a451d9..23f38ab10636 100644
> > --- a/drivers/gpu/drm/i915/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > @@ -93,7 +93,7 @@ static void psr_aux_io_power_put(struct intel_dp
> > *intel_dp)
> > intel_display_power_put(dev_priv,
> > psr_aux_domain(intel_dp));
> > }
> >
> > -static bool intel_dp_get_y_cord_status(struct intel_dp *intel_dp)
> > +static bool intel_dp_get_y_coord_required(struct intel_dp
> > *intel_dp)
> > {
> > uint8_t psr_caps = 0;
> >
> > @@ -130,22 +130,29 @@ void intel_psr_init_dpcd(struct intel_dp
> > *intel_dp)
> > drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp-
> > >psr_dpcd,
> > sizeof(intel_dp->psr_dpcd));
> >
> > - if (intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED) {
> > + if (intel_dp->psr_dpcd[0]) {
> > dev_priv->psr.sink_support = true;
> > DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
> > }
> >
> > if (INTEL_GEN(dev_priv) >= 9 &&
> > - (intel_dp->psr_dpcd[0] & DP_PSR2_IS_SUPPORTED)) {
> > -
> > - dev_priv->psr.sink_support = true;
> > - dev_priv->psr.psr2_support = true;
> > + (intel_dp->psr_dpcd[0] ==
> > DP_PSR2_WITH_Y_COORD_IS_SUPPORTED)) {
> > + /*
> > + * All panels that supports PSR version 03h (PSR2
> > +
> > + * Y-coordinate) can handle Y-coordinates in VSC
> > but we are
> > + * only sure that it is going to be used when
> > required by the
> > + * panel. This way panel is capable to do
> > selective update
> > + * without a aux frame sync.
>
> Can you cite this from the spec please? just the "panel is capable to
> do
> selective update without a aux frame sync" part. Or you could just
> remove that line so that we can get this patch reviewed and merged.
There is no such statement in spec like this, the closest that it have
is:
"When the Source device includes the optional Y-coordinate in the SDP
for PSR2 Operation, as described in Table 6-12, the Sink device can
implement a lower-precision GTC Slave function, as described in Table
7-1."
But we know that this works by all the previous tests when enabling
PSR2 and I also tested it.
>
>
> > + *
> > + * To support PSR version 02h and PSR version 03h
> > without
> > + * Y-coordinate requirement panels we would need
> > to enable
> > + * GTC first.
> > + */
> > + dev_priv->psr.psr2_support =
> > intel_dp_get_y_coord_required(intel_dp);
> > DRM_DEBUG_KMS("PSR2 %s on sink",
> > dev_priv->psr.psr2_support ?
> > "supported" : "not supported");
> >
> > if (dev_priv->psr.psr2_support) {
> > - dev_priv->psr.y_cord_support =
> > - intel_dp_get_y_cord_status(intel_d
> > p);
> > dev_priv->psr.colorimetry_support =
> > intel_dp_get_colorimetry_status(in
> > tel_dp);
> > dev_priv->psr.alpm =
> > @@ -191,16 +198,12 @@ static void hsw_psr_setup_vsc(struct intel_dp
> > *intel_dp,
> > memset(&psr_vsc, 0, sizeof(psr_vsc));
> > psr_vsc.sdp_header.HB0 = 0;
> > psr_vsc.sdp_header.HB1 = 0x7;
> > - if (dev_priv->psr.colorimetry_support &&
> > - dev_priv->psr.y_cord_support) {
> > + if (dev_priv->psr.colorimetry_support) {
> > psr_vsc.sdp_header.HB2 = 0x5;
> > psr_vsc.sdp_header.HB3 = 0x13;
> > - } else if (dev_priv->psr.y_cord_support) {
> > + } else {
> > psr_vsc.sdp_header.HB2 = 0x4;
> > psr_vsc.sdp_header.HB3 = 0xe;
> > - } else {
> > - psr_vsc.sdp_header.HB2 = 0x3;
> > - psr_vsc.sdp_header.HB3 = 0xc;
> > }
> > } else {
> > /* Prepare VSC packet as per EDP 1.3 spec, Table
> > 3.10 */
> > @@ -458,15 +461,6 @@ static bool intel_psr2_config_valid(struct
> > intel_dp *intel_dp,
> > return false;
> > }
> >
> > - /*
> > - * FIXME:enable psr2 only for y-cordinate psr2 panels
> > - * After gtc implementation , remove this restriction.
> > - */
> > - if (!dev_priv->psr.y_cord_support) {
> > - DRM_DEBUG_KMS("PSR2 not enabled, panel does not
> > support Y coordinate\n");
> > - return false;
> > - }
> > -
> > return true;
> > }
> >
> > @@ -566,7 +560,6 @@ static void hsw_psr_enable_source(struct
> > intel_dp *intel_dp,
> > struct drm_device *dev = dig_port->base.base.dev;
> > struct drm_i915_private *dev_priv = to_i915(dev);
> > enum transcoder cpu_transcoder = crtc_state-
> > >cpu_transcoder;
> > - u32 chicken;
> >
> > psr_aux_io_power_get(intel_dp);
> >
> > @@ -577,9 +570,8 @@ static void hsw_psr_enable_source(struct
> > intel_dp *intel_dp,
> > hsw_psr_setup_aux(intel_dp);
> >
> > if (dev_priv->psr.psr2_support) {
> > - chicken = PSR2_VSC_ENABLE_PROG_HEADER;
> > - if (dev_priv->psr.y_cord_support)
> > - chicken |= PSR2_ADD_VERTICAL_LINE_COUNT;
> > + u32 chicken = PSR2_VSC_ENABLE_PROG_HEADER
> > + | PSR2_ADD_VERTICAL_LINE_COUNT;
> > I915_WRITE(CHICKEN_TRANS(cpu_transcoder),
> > chicken);
> >
> > I915_WRITE(EDP_PSR_DEBUG,
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