| Message ID | 20240210015223.24670-3-quic_parellan@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for CDM over DP | expand |
On Sat, 10 Feb 2024 at 03:53, Paloma Arellano <quic_parellan@quicinc.com> wrote: > > YUV420 format is supported only in the VSC SDP packet and not through > MSA. Hence add an API which indicates the sink support which can be used > by the rest of the DP programming. > > Changes in v2: > - Move VSC SDP support check API from dp_panel.c to > drm_dp_helper.c > > Signed-off-by: Paloma Arellano <quic_parellan@quicinc.com> > --- > drivers/gpu/drm/display/drm_dp_helper.c | 21 +++++++++++++++++++++ > include/drm/display/drm_dp_helper.h | 1 + > 2 files changed, 22 insertions(+) > > diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c > index d72b6f9a352c1..c6ee0f9ab5f8f 100644 > --- a/drivers/gpu/drm/display/drm_dp_helper.c > +++ b/drivers/gpu/drm/display/drm_dp_helper.c > @@ -2917,6 +2917,27 @@ void drm_dp_vsc_sdp_log(const char *level, struct device *dev, > } > EXPORT_SYMBOL(drm_dp_vsc_sdp_log); > > +/** > + * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported > + * @aux: DisplayPort AUX channel > + * @dpcd: DisplayPort configuration data > + * > + * Returns true if vsc sdp is supported, else returns false > + */ > +bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]) > +{ > + u8 rx_feature; > + > + if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST, &rx_feature) != 1) { > + drm_dbg_dp(aux->drm_dev, "failed to read DP_DPRX_FEATURE_ENUMERATION_LIST\n"); > + return false; > + } > + > + return (dpcd[DP_DPCD_REV] >= DP_DPCD_REV_13) && > + !!(rx_feature & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED); Nit: we don't even need the `!!` here. I'll probably drop it while applying. Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > +} > +EXPORT_SYMBOL(drm_dp_vsc_sdp_supported); > + > /** > * drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON > * @dpcd: DisplayPort configuration data > diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h > index 863b2e7add29e..948381b2b0b1b 100644 > --- a/include/drm/display/drm_dp_helper.h > +++ b/include/drm/display/drm_dp_helper.h > @@ -100,6 +100,7 @@ struct drm_dp_vsc_sdp { > > void drm_dp_vsc_sdp_log(const char *level, struct device *dev, > const struct drm_dp_vsc_sdp *vsc); > +bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); > > int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]); > > -- > 2.39.2 >
On Sat, 10 Feb 2024 at 11:37, Dmitry Baryshkov <dmitry.baryshkov@linaro.org> wrote: > > On Sat, 10 Feb 2024 at 03:53, Paloma Arellano <quic_parellan@quicinc.com> wrote: > > > > YUV420 format is supported only in the VSC SDP packet and not through > > MSA. Hence add an API which indicates the sink support which can be used > > by the rest of the DP programming. > > > > Changes in v2: > > - Move VSC SDP support check API from dp_panel.c to > > drm_dp_helper.c > > > > Signed-off-by: Paloma Arellano <quic_parellan@quicinc.com> > > --- > > drivers/gpu/drm/display/drm_dp_helper.c | 21 +++++++++++++++++++++ > > include/drm/display/drm_dp_helper.h | 1 + > > 2 files changed, 22 insertions(+) > > > > diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c > > index d72b6f9a352c1..c6ee0f9ab5f8f 100644 > > --- a/drivers/gpu/drm/display/drm_dp_helper.c > > +++ b/drivers/gpu/drm/display/drm_dp_helper.c > > @@ -2917,6 +2917,27 @@ void drm_dp_vsc_sdp_log(const char *level, struct device *dev, > > } > > EXPORT_SYMBOL(drm_dp_vsc_sdp_log); > > > > +/** > > + * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported > > + * @aux: DisplayPort AUX channel > > + * @dpcd: DisplayPort configuration data > > + * > > + * Returns true if vsc sdp is supported, else returns false > > + */ > > +bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]) > > +{ > > + u8 rx_feature; > > + > > + if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST, &rx_feature) != 1) { > > + drm_dbg_dp(aux->drm_dev, "failed to read DP_DPRX_FEATURE_ENUMERATION_LIST\n"); > > + return false; > > + } > > + > > + return (dpcd[DP_DPCD_REV] >= DP_DPCD_REV_13) && > > + !!(rx_feature & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED); > > Nit: we don't even need the `!!` here. I'll probably drop it while applying. > > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Also the prefix should be drm/display/dp, not drm/msm/dp. Could you please send this patch separately to dri-devel, fixing the prefix, dropping double inversion and adding Intel people to cc? We'd need an ack from the drm core team to get this applied. > > > > +} > > +EXPORT_SYMBOL(drm_dp_vsc_sdp_supported); > > + > > /** > > * drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON > > * @dpcd: DisplayPort configuration data > > diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h > > index 863b2e7add29e..948381b2b0b1b 100644 > > --- a/include/drm/display/drm_dp_helper.h > > +++ b/include/drm/display/drm_dp_helper.h > > @@ -100,6 +100,7 @@ struct drm_dp_vsc_sdp { > > > > void drm_dp_vsc_sdp_log(const char *level, struct device *dev, > > const struct drm_dp_vsc_sdp *vsc); > > +bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); > > > > int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]); > > > > -- > > 2.39.2 > > > > > -- > With best wishes > Dmitry
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index d72b6f9a352c1..c6ee0f9ab5f8f 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2917,6 +2917,27 @@ void drm_dp_vsc_sdp_log(const char *level, struct device *dev, } EXPORT_SYMBOL(drm_dp_vsc_sdp_log); +/** + * drm_dp_vsc_sdp_supported() - check if vsc sdp is supported + * @aux: DisplayPort AUX channel + * @dpcd: DisplayPort configuration data + * + * Returns true if vsc sdp is supported, else returns false + */ +bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]) +{ + u8 rx_feature; + + if (drm_dp_dpcd_readb(aux, DP_DPRX_FEATURE_ENUMERATION_LIST, &rx_feature) != 1) { + drm_dbg_dp(aux->drm_dev, "failed to read DP_DPRX_FEATURE_ENUMERATION_LIST\n"); + return false; + } + + return (dpcd[DP_DPCD_REV] >= DP_DPCD_REV_13) && + !!(rx_feature & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED); +} +EXPORT_SYMBOL(drm_dp_vsc_sdp_supported); + /** * drm_dp_get_pcon_max_frl_bw() - maximum frl supported by PCON * @dpcd: DisplayPort configuration data diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 863b2e7add29e..948381b2b0b1b 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -100,6 +100,7 @@ struct drm_dp_vsc_sdp { void drm_dp_vsc_sdp_log(const char *level, struct device *dev, const struct drm_dp_vsc_sdp *vsc); +bool drm_dp_vsc_sdp_supported(struct drm_dp_aux *aux, const u8 dpcd[DP_RECEIVER_CAP_SIZE]); int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);
YUV420 format is supported only in the VSC SDP packet and not through MSA. Hence add an API which indicates the sink support which can be used by the rest of the DP programming. Changes in v2: - Move VSC SDP support check API from dp_panel.c to drm_dp_helper.c Signed-off-by: Paloma Arellano <quic_parellan@quicinc.com> --- drivers/gpu/drm/display/drm_dp_helper.c | 21 +++++++++++++++++++++ include/drm/display/drm_dp_helper.h | 1 + 2 files changed, 22 insertions(+)