[v6 11/13] drm/i915:Enabled Modeset when HDR Infoframe changes

[Sharma, Shashank]

On 3/20/2019 4:18 PM, Uma Shankar wrote:
> This patch enables modeset whenever HDR metadata
> needs to be updated to sink.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
> ---
>   drivers/gpu/drm/i915/intel_atomic.c | 15 ++++++++++++++-
>   drivers/gpu/drm/i915/intel_hdmi.c   |  4 ++++
>   2 files changed, 18 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
> index b844e88..4ff6042 100644
> --- a/drivers/gpu/drm/i915/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> @@ -102,6 +102,16 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
>   	return -EINVAL;
>   }
>   
> +static bool blob_equal(const struct drm_property_blob *a,
> +		       const struct drm_property_blob *b)
> +{
> +	if (a && b)
> +		return a->length == b->length &&
> +			!memcmp(a->data, b->data, a->length);
> +
> +	return !a == !b;
> +}
> +
>   int intel_digital_connector_atomic_check(struct drm_connector *conn,
>   					 struct drm_connector_state *new_state)
>   {
> @@ -129,7 +139,10 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
>   	    new_conn_state->base.colorspace != old_conn_state->base.colorspace ||
>   	    new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
>   	    new_conn_state->base.content_type != old_conn_state->base.content_type ||
> -	    new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode)
> +	    new_conn_state->base.scaling_mode !=
> +				old_conn_state->base.scaling_mode ||
> +	    !blob_equal(new_conn_state->base.hdr_output_metadata_blob_ptr,
If you are keeping this line ahead of the upper one due to 80 char 
limit, please pull that one also two tabs back, right now this is not 
even looking good.
> +			old_conn_state->base.hdr_output_metadata_blob_ptr))
>   		crtc_state->mode_changed = true;
>   
>   	return 0;
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 8decafd..4d06734 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -792,6 +792,10 @@ void intel_read_infoframe(struct intel_encoder *encoder,
>   	struct hdr_static_metadata *hdr_metadata;
>   	int ret;
>   
> +	if (!conn_state->hdr_output_metadata_blob_ptr ||
> +	    conn_state->hdr_output_metadata_blob_ptr->length == 0)
> +		return true;
> +

This patch needs a rebase on the latest code, as this is definitely not 
where we want this code :-)

- Shashank

>   	hdr_metadata = (struct hdr_static_metadata *)
>   			conn_state->hdr_output_metadata_blob_ptr->data;
>