Nouveau - Sep 2022 - [PATCH v2 32/41] drm/vc4: vec: Convert to the new TV mode property

Den 29.08.2022 15.11, skrev Maxime Ripard:
> Now that the core can deal fine with analog TV modes, let's convert the
vc4
> 
> VEC driver to leverage those new features.
> 
> 
> 
> We've added some backward compatibility to support the old TV mode
property
> 
> and translate it into the new TV norm property.
> 
> 
> 
> Signed-off-by: Maxime Ripard <maxime at cerno.tech>
> 
> 
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
> 
> index ba6f81908923..58286acf4b9e 100644
> 
> --- a/drivers/gpu/drm/vc4/vc4_vec.c
> 
> +++ b/drivers/gpu/drm/vc4/vc4_vec.c
> @@ -192,7 +200,7 @@ enum vc4_vec_tv_mode_id {
> 
>  };
> 
>  
> 
>  struct vc4_vec_tv_mode {
> 
> -	const struct drm_display_mode *mode;
> 
> +	unsigned int mode;
> 
>  	u32 config0;
> 
>  	u32 config1;
> 
>  	u32 custom_freq;
> 
> @@ -226,28 +234,50 @@ static const struct debugfs_reg32 vec_regs[] = {
> 
>  };
> 
>  
> 
>  static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
> 
> -	[VC4_VEC_TV_MODE_NTSC] = {
> 
> -		.mode = &drm_mode_480i,
> 
> +	{
> 
> +		.mode = DRM_MODE_TV_MODE_NTSC_M,
> 
>  		.config0 = VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN,
> 
>  		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
> -	[VC4_VEC_TV_MODE_NTSC_J] = {
> 
> -		.mode = &drm_mode_480i,
> 
> +	{
> 
> +		.mode = DRM_MODE_TV_MODE_NTSC_J,
> 
>  		.config0 = VEC_CONFIG0_NTSC_STD,
> 
>  		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
> -	[VC4_VEC_TV_MODE_PAL] = {
> 
> -		.mode = &drm_mode_576i,
> 
> +	{
> 
> +		.mode = DRM_MODE_TV_MODE_PAL_B,
> 
>  		.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
> 
>  		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
> -	[VC4_VEC_TV_MODE_PAL_M] = {
> 
> -		.mode = &drm_mode_480i,
> 
> +	{
> 
> +		.mode = DRM_MODE_TV_MODE_PAL_M,
> 
>  		.config0 = VEC_CONFIG0_PAL_M_STD,
> 
>  		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
>  };
> 
>  
> 
> +static inline const struct vc4_vec_tv_mode *
> 
> +vc4_vec_tv_mode_lookup(unsigned int mode)
> 
> +{
> 
> +	unsigned int i;
> 
> +
> 
> +	for (i = 0; i < ARRAY_SIZE(vc4_vec_tv_modes); i++) {
> 
> +		const struct vc4_vec_tv_mode *tv_mode = &vc4_vec_tv_modes[i];
> 
> +
> 
> +		if (tv_mode->mode == mode)
> 
> +			return tv_mode;
> 
> +	}
> 
> +
> 
> +	return NULL;
> 
> +}
> 
> +
> 
> +static const struct drm_prop_enum_list tv_mode_names[] = {
Maybe call it legacy_tv_mode_enums?
> 
> +	{ VC4_VEC_TV_MODE_NTSC, "NTSC", },
> 
> +	{ VC4_VEC_TV_MODE_NTSC_J, "NTSC-J", },
> 
> +	{ VC4_VEC_TV_MODE_PAL, "PAL", },
> 
> +	{ VC4_VEC_TV_MODE_PAL_M, "PAL-M", },
If you use DRM_MODE_TV_MODE_* here you don't need to translate the value
using the switch statement in get/set property, you can use the value
directly to get/set tv.mode.

Noralf.
> 
> +};

Hi Noralf,

On Tue, Aug 30, 2022 at 09:01:08PM +0200, Noralf Tr?nnes
wrote:
> > +static const struct drm_prop_enum_list tv_mode_names[] = {
> 
> Maybe call it legacy_tv_mode_enums?
> 
> > 
> > +	{ VC4_VEC_TV_MODE_NTSC, "NTSC", },
> > 
> > +	{ VC4_VEC_TV_MODE_NTSC_J, "NTSC-J", },
> > 
> > +	{ VC4_VEC_TV_MODE_PAL, "PAL", },
> > 
> > +	{ VC4_VEC_TV_MODE_PAL_M, "PAL-M", },
> 
> If you use DRM_MODE_TV_MODE_* here you don't need to translate the
value
> using the switch statement in get/set property, you can use the value
> directly to get/set tv.mode.
I'm sorry, I'm not quite sure what you mean by that. If we expose the
DRM_MODE_TV_MODE_* properties there, won't that change the values the
userspace will need to use to set that property?

Maxime