[Intel-gfx] [v6 05/11] drm/i915/display: Enable HDR for Parade based lspcon

[Shankar, Uma]

> -----Original Message-----
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Sent: Tuesday, September 29, 2020 9:49 PM
> To: Shankar, Uma <uma.shankar at intel.com>
> Cc: intel-gfx at lists.freedesktop.org; Anand, Vipin <vipin.anand at intel.com>
> Subject: Re: [v6 05/11] drm/i915/display: Enable HDR for Parade based lspcon
> 
> On Tue, Sep 15, 2020 at 02:30:41AM +0530, Uma Shankar wrote:
> > Enable HDR for LSPCON based on Parade along with MCA.
> >
> > Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> > Signed-off-by: Vipin Anand <vipin.anand at intel.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_lspcon.c | 19 ++++++++-----------
> >  1 file changed, 8 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c
> > b/drivers/gpu/drm/i915/display/intel_lspcon.c
> > index b0ca494f1110..60863b825cc5 100644
> > --- a/drivers/gpu/drm/i915/display/intel_lspcon.c
> > +++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
> > @@ -36,6 +36,7 @@
> >  #define LSPCON_VENDOR_MCA_OUI 0x0060AD
> >
> >  #define DPCD_MCA_LSPCON_HDR_STATUS	0x70003
> > +#define DPCD_PARADE_LSPCON_HDR_STATUS	0x00511
> >
> >  /* AUX addresses to write MCA AVI IF */  #define
> > LSPCON_MCA_AVI_IF_WRITE_OFFSET 0x5C0 @@ -112,16 +113,20 @@ static
> void
> > lspcon_detect_hdr_capability(struct intel_lspcon *lspcon)
> >  		container_of(lspcon, struct intel_digital_port, lspcon);
> >  	struct drm_device *dev = intel_dig_port->base.base.dev;
> >  	struct intel_dp *dp = lspcon_to_intel_dp(lspcon);
> > +	u32 lspcon_hdr_status_reg;
> >  	u8 hdr_caps;
> >  	int ret;
> >
> > -	/* Enable HDR for MCA based LSPCON devices */
> >  	if (lspcon->vendor == LSPCON_VENDOR_MCA)
> > -		ret = drm_dp_dpcd_read(&dp->aux,
> DPCD_MCA_LSPCON_HDR_STATUS,
> > -				       &hdr_caps, 1);
> > +		lspcon_hdr_status_reg = DPCD_MCA_LSPCON_HDR_STATUS;
> > +	else if (lspcon->vendor == LSPCON_VENDOR_PARADE)
> > +		lspcon_hdr_status_reg = DPCD_PARADE_LSPCON_HDR_STATUS;
> >  	else
> >  		return;
> 
> That could be small helper function.

Ok, will add the same.

> >
> > +	ret = drm_dp_dpcd_read(&dp->aux, lspcon_hdr_status_reg,
> > +			       &hdr_caps, 1);
> > +
> >  	if (ret < 0) {
> >  		drm_dbg_kms(dev, "hdr capability detection failed\n");
> >  		lspcon->hdr_supported = false;
> > @@ -465,14 +470,6 @@ void lspcon_write_infoframe(struct intel_encoder
> *encoder,
> >  	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> >  	struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
> >
> > -	/*
> > -	 * Supporting HDR on MCA LSPCON
> > -	 * Todo: Add support for Parade later
> > -	 */
> > -	if (type == HDMI_PACKET_TYPE_GAMUT_METADATA &&
> > -	    lspcon->vendor != LSPCON_VENDOR_MCA)
> > -		return;
> > -
> >  	switch (type) {
> >  	case HDMI_INFOFRAME_TYPE_AVI:
> >  		if (lspcon->vendor == LSPCON_VENDOR_MCA)
> > --
> > 2.26.2
> 
> --
> Ville Syrjälä
> Intel