On Wed, Nov 04, 2020 at 01:00:53PM +0530, Uma Shankar wrote:
> Attach HDR property for Gen9 devices with MCA LSPCON
> chips.
>
> v2: Cleaned HDR property attachment logic based on capability
> as per Jani Nikula's suggestion.
>
> v3: Fixed the HDR property attachment logic as per the new changes
> by Kai-Feng to align with lspcon detection failure on some devices.
>
> v4: Add HDR proprty in late_register to handle lspcon detection,
> as suggested by Ville.
>
> v5: Init Lspcon only if advertized from BIOS.
>
> Signed-off-by: Uma Shankar <uma.shan...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 14 ++++++++++++++
> drivers/gpu/drm/i915/display/intel_lspcon.c | 2 +-
> drivers/gpu/drm/i915/display/intel_lspcon.h | 1 +
> 3 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index cf09aca7607b..07eda10f8add 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -6714,6 +6714,8 @@ intel_dp_connector_register(struct drm_connector
> *connector)
> {
> struct drm_i915_private *i915 = to_i915(connector->dev);
> struct intel_dp *intel_dp =
> intel_attached_dp(to_intel_connector(connector));
> + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> + struct intel_lspcon *lspcon = &dig_port->lspcon;
> int ret;
>
> ret = intel_connector_register(connector);
> @@ -6727,6 +6729,18 @@ intel_dp_connector_register(struct drm_connector
> *connector)
> ret = drm_dp_aux_register(&intel_dp->aux);
> if (!ret)
> drm_dp_cec_register_connector(&intel_dp->aux, connector);
> +
> + if (!intel_bios_is_lspcon_present(i915, dig_port->base.port))
> + return ret;
> +
> + if (lspcon_init(dig_port)) {
> + lspcon_detect_hdr_capability(lspcon);
> + if (lspcon->hdr_supported)
Kinda messy having all these ifs for this little thing.
Probsbly should do a followup to clean up all this lspcon
init/resume stuff to be less convoluted.
> + drm_object_attach_property(&connector->base,
> +
> connector->dev->mode_config.hdr_output_metadata_property,
> + 0);
Assuming this doesn't trip up the
"can't attach props to registered connectors" checks
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> + }
> +
> return ret;
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c
> b/drivers/gpu/drm/i915/display/intel_lspcon.c
> index 46565ae555b1..336494b60d11 100644
> --- a/drivers/gpu/drm/i915/display/intel_lspcon.c
> +++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
> @@ -553,7 +553,7 @@ void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon)
> lspcon_wait_mode(lspcon, DRM_LSPCON_MODE_PCON);
> }
>
> -static bool lspcon_init(struct intel_digital_port *dig_port)
> +bool lspcon_init(struct intel_digital_port *dig_port)
> {
> struct intel_dp *dp = &dig_port->dp;
> struct intel_lspcon *lspcon = &dig_port->lspcon;
> diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.h
> b/drivers/gpu/drm/i915/display/intel_lspcon.h
> index 98043ba50dd4..42ccb21c908f 100644
> --- a/drivers/gpu/drm/i915/display/intel_lspcon.h
> +++ b/drivers/gpu/drm/i915/display/intel_lspcon.h
> @@ -15,6 +15,7 @@ struct intel_digital_port;
> struct intel_encoder;
> struct intel_lspcon;
>
> +bool lspcon_init(struct intel_digital_port *dig_port);
> void lspcon_detect_hdr_capability(struct intel_lspcon *lspcon);
> void lspcon_resume(struct intel_digital_port *dig_port);
> void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon);
> --
> 2.26.2
--
Ville Syrjälä
Intel
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