linux-kernel - Re: [PATCH v4 30/30] drm/sun4i: tv: Convert to the new TV mode property

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Message-ID: <415275a6-7b3c-0550-6ed4-01245f385331@tronnes.org>
Date:   Sat, 1 Oct 2022 14:37:43 +0200
From:   Noralf Trønnes <noralf@...nnes.org>
To:     Maxime Ripard <maxime@...no.tech>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Karol Herbst <kherbst@...hat.com>,
        Samuel Holland <samuel@...lland.org>,
        Lyude Paul <lyude@...hat.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Emma Anholt <emma@...olt.net>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Ben Skeggs <bskeggs@...hat.com>,
        David Airlie <airlied@...ux.ie>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        dri-devel@...ts.freedesktop.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        intel-gfx@...ts.freedesktop.org, linux-sunxi@...ts.linux.dev,
        Hans de Goede <hdegoede@...hat.com>,
        nouveau@...ts.freedesktop.org,
        Mateusz Kwiatkowski <kfyatek+publicgit@...il.com>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        linux-kernel@...r.kernel.org, Dom Cobley <dom@...pberrypi.com>,
        Phil Elwell <phil@...pberrypi.com>,
        Noralf Trønnes <noralf@...nnes.org>
Subject: Re: [PATCH v4 30/30] drm/sun4i: tv: Convert to the new TV mode
 property



Den 29.09.2022 18.31, skrev Maxime Ripard:
> Now that the core can deal fine with analog TV modes, let's convert the
> sun4i TV driver to leverage those new features.
> 
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---
>  drivers/gpu/drm/sun4i/sun4i_tv.c | 148 ++++++++++++++-------------------------
>  drivers/gpu/drm/vc4/vc4_vec.c    |   5 +-
>  2 files changed, 54 insertions(+), 99 deletions(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun4i_tv.c b/drivers/gpu/drm/sun4i/sun4i_tv.c

> @@ -467,35 +398,46 @@ static const struct drm_encoder_helper_funcs sun4i_tv_helper_funcs = {
>  
>  static int sun4i_tv_comp_get_modes(struct drm_connector *connector)
>  {
> -	int i;
> +	struct drm_display_mode *mode;
> +	int count = 0;
>  
> -	for (i = 0; i < ARRAY_SIZE(tv_modes); i++) {
> -		struct drm_display_mode *mode;
> -		const struct tv_mode *tv_mode = &tv_modes[i];
> -
> -		mode = drm_mode_create(connector->dev);
> -		if (!mode) {
> -			DRM_ERROR("Failed to create a new display mode\n");
> -			return 0;
> -		}
> +	mode = drm_mode_analog_ntsc_480i(connector->dev);
> +	if (!mode) {
> +		DRM_ERROR("Failed to create a new display mode\n");
> +		return -ENOMEM;
> +	}
>  
> -		strcpy(mode->name, tv_mode->name);
> +	mode->type |= DRM_MODE_TYPE_PREFERRED;
> +	drm_mode_probed_add(connector, mode);
> +	count += 1;
>  
> -		sun4i_tv_mode_to_drm_mode(tv_mode, mode);
> -		drm_mode_probed_add(connector, mode);
> +	mode = drm_mode_analog_pal_576i(connector->dev);
> +	if (!mode) {
> +		DRM_ERROR("Failed to create a new display mode\n");
> +		return -ENOMEM;
>  	}
>  
> -	return i;
> +	drm_mode_probed_add(connector, mode);
> +	count += 1;
> +
> +	return count;

count is always 2 so you can just return 2.

Acked-by: Noralf Trønnes <noralf@...nnes.org>

>  }

This stray hunk belongs to the vc4 TV mode patch I guess:

> diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
> index 8d37d7ba9b2a..88b4330bfa39 100644
> --- a/drivers/gpu/drm/vc4/vc4_vec.c
> +++ b/drivers/gpu/drm/vc4/vc4_vec.c
> @@ -322,7 +322,7 @@ vc4_vec_tv_mode_lookup(unsigned int mode)
>  	return NULL;
>  }
>  
> -static const struct drm_prop_enum_list tv_mode_names[] = {
> +static const struct drm_prop_enum_list legacy_tv_mode_names[] = {
>  	{ VC4_VEC_TV_MODE_NTSC, "NTSC", },
>  	{ VC4_VEC_TV_MODE_NTSC_443, "NTSC-443", },
>  	{ VC4_VEC_TV_MODE_NTSC_J, "NTSC-J", },
> @@ -498,7 +498,8 @@ static int vc4_vec_connector_init(struct drm_device *dev, struct vc4_vec *vec)
>  				   DRM_MODE_TV_MODE_NTSC);
>  
>  	prop = drm_property_create_enum(dev, 0, "mode",
> -					tv_mode_names, ARRAY_SIZE(tv_mode_names));
> +					legacy_tv_mode_names,
> +					ARRAY_SIZE(legacy_tv_mode_names));
>  	if (!prop)
>  		return -ENOMEM;
>  	vec->legacy_tv_mode_property = prop;
> 

Noralf.