linux-kernel - Re: [PATCH v2 2/2] drm/vc4: hdmi: Remove vc4_hdmi_encoder.hdmi

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Message-ID: <20220419124159.2fjadxdornszocrk@houat>
Date:   Tue, 19 Apr 2022 14:41:59 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     José Expósito <jose.exposito89@...il.com>
Cc:     emma@...olt.net, laurent.pinchart@...asonboard.com,
        airlied@...ux.ie, daniel@...ll.ch, p.zabel@...gutronix.de,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] drm/vc4: hdmi: Remove
 vc4_hdmi_encoder.hdmi_monitor

Hi,

On Fri, Apr 15, 2022 at 05:47:45PM +0200, José Expósito wrote:
> The vc4_hdmi_encoder.hdmi_monitor field was used to cache the value
> returned by drm_detect_hdmi_monitor() in order to avoid calling it
> multiple times.
> 
> Now that drm_detect_hdmi_monitor() has been replaced with
> drm_display_info.is_hdmi, there is no need to cache it in the driver
> encoder struct.
> 
> Remove vc4_hdmi_encoder.hdmi_monitor and use drm_display_info.is_hdmi
> instead.
> 
> Signed-off-by: José Expósito <jose.exposito89@...il.com>
> ---
>  drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++++-----------
>  drivers/gpu/drm/vc4/vc4_hdmi.h |  1 -
>  2 files changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index ecdb1ffc2023..9c73a211ae80 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -107,9 +107,9 @@ static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode)
>  static bool vc4_hdmi_is_full_range_rgb(struct vc4_hdmi *vc4_hdmi,
>  				       const struct drm_display_mode *mode)
>  {
> -	struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
> +	struct drm_display_info *display = &vc4_hdmi->connector.display_info;
>  
> -	return !vc4_encoder->hdmi_monitor ||
> +	return !display->is_hdmi ||
>  		drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL;
>  }
>  
> @@ -216,7 +216,6 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
>  
>  			if (edid) {
>  				cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
> -				vc4_hdmi->encoder.hdmi_monitor = connector->display_info.is_hdmi;

I think the first patch could be squashed into this one

>  				kfree(edid);
>  			}
>  		}
> @@ -242,7 +241,6 @@ static void vc4_hdmi_connector_destroy(struct drm_connector *connector)
>  static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
>  {
>  	struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
> -	struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
>  	int ret = 0;
>  	struct edid *edid;
>  
> @@ -255,8 +253,6 @@ static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
>  		goto out;
>  	}
>  
> -	vc4_encoder->hdmi_monitor = connector->display_info.is_hdmi;
> -
>  	drm_connector_update_edid_property(connector, edid);
>  	ret = drm_add_edid_modes(connector, edid);
>  	kfree(edid);
> @@ -578,13 +574,12 @@ static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
>  static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder,
>  					 struct drm_display_mode *mode)
>  {
> -	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
>  	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
>  	struct drm_display_info *display = &vc4_hdmi->connector.display_info;
>  
>  	lockdep_assert_held(&vc4_hdmi->mutex);
>  
> -	if (!vc4_encoder->hdmi_monitor)
> +	if (!display->is_hdmi)
>  		return false;
>  
>  	if (!display->hdmi.scdc.supported ||
> @@ -1147,7 +1142,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
>  {
>  	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
>  	struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
> -	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
> +	struct drm_display_info *display = &vc4_hdmi->connector.display_info;
>  	bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
>  	bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
>  	unsigned long flags;
> @@ -1168,7 +1163,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
>  	HDMI_WRITE(HDMI_VID_CTL,
>  		   HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_BLANKPIX);
>  
> -	if (vc4_encoder->hdmi_monitor) {
> +	if (display->is_hdmi) {
>  		HDMI_WRITE(HDMI_SCHEDULER_CONTROL,
>  			   HDMI_READ(HDMI_SCHEDULER_CONTROL) |
>  			   VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
> @@ -1195,7 +1190,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
>  			  "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
>  	}
>  
> -	if (vc4_encoder->hdmi_monitor) {
> +	if (display->is_hdmi) {
>  		spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
>  
>  		WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
> index 1076faeab616..44977002445f 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.h
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
> @@ -11,7 +11,6 @@
>  /* VC4 HDMI encoder KMS struct */
>  struct vc4_hdmi_encoder {
>  	struct vc4_encoder base;
> -	bool hdmi_monitor;
>  };

And vc4_hdmi_encoder doesn't hold anything anymore now, so it can be
removed as well. Doing it in a subsequent patch would probably be the
most readable.

Thanks!
Maxime

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