[v10 09/12] drm/i915:Enabled Modeset when HDR Infoframe changes

[Shankar, Uma]

>-----Original Message-----
>From: dri-devel [mailto:dri-devel-bounces at lists.freedesktop.org] On Behalf Of Ville
>Syrjälä
>Sent: Thursday, May 16, 2019 12:57 AM
>To: Shankar, Uma <uma.shankar at intel.com>
>Cc: dcastagna at chromium.org; jonas at kwiboo.se; intel-gfx at lists.freedesktop.org;
>emil.l.velikov at gmail.com; dri-devel at lists.freedesktop.org; seanpaul at chromium.org
>Subject: Re: [v10 09/12] drm/i915:Enabled Modeset when HDR Infoframe changes
>
>On Tue, May 14, 2019 at 11:06:31PM +0530, Uma Shankar wrote:
>> This patch enables modeset whenever HDR metadata needs to be updated
>> to sink.
>>
>> v2: Addressed Shashank's review comments.
>>
>> v3: Added Shashank's RB.
>>
>> v4: Addressed Ville's review comments.
>>
>> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> Signed-off-by: Uma Shankar <uma.shankar at intel.com>
>> Reviewed-by: Shashank Sharma <shashank.sharma at intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_atomic.c | 14 +++++++++++++-
>>  drivers/gpu/drm/i915/intel_hdmi.c   | 13 +++++++++++++
>>  2 files changed, 26 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_atomic.c
>> b/drivers/gpu/drm/i915/intel_atomic.c
>> index 58b8049..6b985e8 100644
>> --- a/drivers/gpu/drm/i915/intel_atomic.c
>> +++ b/drivers/gpu/drm/i915/intel_atomic.c
>> @@ -105,6 +105,16 @@ 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)  {
>@@ -132,7 +142,9 @@
>> 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,
>> +			old_conn_state->base.hdr_output_metadata))
>>  		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 b80406b..e97bf6e 100644
>> --- a/drivers/gpu/drm/i915/intel_hdmi.c
>> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
>> @@ -806,6 +806,11 @@ void intel_read_infoframe(struct intel_encoder *encoder,
>>  	return true;
>>  }
>>
>> +static inline bool is_eotf_supported(u8 output_eotf, u8 sink_eotf) {
>> +	return sink_eotf & BIT(output_eotf); }
>> +
>>  static bool
>>  intel_hdmi_compute_drm_infoframe(struct intel_encoder *encoder,
>>  				 struct intel_crtc_state *crtc_state, @@ -814,6
>+819,7 @@ void
>> intel_read_infoframe(struct intel_encoder *encoder,
>>  	struct hdmi_drm_infoframe *frame = &crtc_state->infoframes.drm.drm;
>>  	struct hdr_output_metadata *hdr_metadata;
>>  	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>> +	struct drm_connector *connector = conn_state->connector;
>>  	int ret;
>>
>>  	if (!(INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))) @@
>> -828,6 +834,13 @@ void intel_read_infoframe(struct intel_encoder
>> *encoder,
>>
>>  	hdr_metadata = conn_state->hdr_output_metadata->data;
>>
>> +	/* Sink EOTF is Bit map while infoframe is absolute values */
>> +	if (!is_eotf_supported(hdr_metadata->hdmi_metadata_type1.eotf,
>> +	    connector->hdr_sink_metadata.hdmi_type1.eotf)) {
>> +		DRM_ERROR("EOTF Not Supported\n");
>> +		return true;
>> +	}
>
>I was going to say that this should probably be in the
>drm_set_hdr_metdata() or whatever it was called.
>
>But now I'm now wondering if we can even have this check here. What happens if
>someone does a display switcheroo while the machine is suspended? Depends on
>when we're going to reprobe the displays I suppose. Hmm. Maybe it's fine. We
>already have a similar issue after all wih the has_hdmi2_sink stuff.
>
>Either way the user triggerable DRM_ERROR()s are at least a nono.

Ok, Will keep the check and move it inside the drm_set_hdr_metdata(). Also downgrade
the print as INFO instead of ERROR. Hope this is fine.

>> +
>>  	crtc_state->infoframes.enable |=
>>  		intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM);
>>
>> --
>> 1.9.1
>
>--
>Ville Syrjälä
>Intel
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