Re: [PATCH v2 26/41] drm/vc4: vec: Refactor VEC TV mode setting

[Noralf Trønnes]

Den 29.08.2022 15.11, skrev Maxime Ripard:
> From: Mateusz Kwiatkowski <kfyatek+publicgit@xxxxxxxxx>
> 
> 
> 
> Change the mode_set function pointer logic to declarative config0,
> 
> config1 and custom_freq fields, to make TV mode setting logic more
> 
> concise and uniform.
> 
> 
> 
> Signed-off-by: Mateusz Kwiatkowski <kfyatek+publicgit@xxxxxxxxx>
> 
> Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
> 
> 
> 
> diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
> 
> index 72eee0cbb615..9a37c3fcc295 100644
> 
> --- a/drivers/gpu/drm/vc4/vc4_vec.c
> 
> +++ b/drivers/gpu/drm/vc4/vc4_vec.c
> 
> @@ -194,7 +194,9 @@ enum vc4_vec_tv_mode_id {
> 
>  
> 
>  struct vc4_vec_tv_mode {
> 
>  	const struct drm_display_mode *mode;
> 
> -	void (*mode_set)(struct vc4_vec *vec);
> 
> +	u32 config0;
> 
> +	u32 config1;
> 
> +	u32 custom_freq;
> 
>  };
> 
>  
> 
>  static const struct debugfs_reg32 vec_regs[] = {
> 
> @@ -224,34 +226,6 @@ static const struct debugfs_reg32 vec_regs[] = {
> 
>  	VC4_REG32(VEC_DAC_MISC),
> 
>  };
> 
>  
> 
> -static void vc4_vec_ntsc_mode_set(struct vc4_vec *vec)
> 
> -{
> 
> -	struct drm_device *drm = vec->connector.dev;
> 
> -	int idx;
> 
> -
> 
> -	if (!drm_dev_enter(drm, &idx))
> 
> -		return;
> 
> -
> 
> -	VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN);
> 
> -	VEC_WRITE(VEC_CONFIG1, VEC_CONFIG1_C_CVBS_CVBS);
> 
> -
> 
> -	drm_dev_exit(idx);
> 
> -}
> 
> -
> 
> -static void vc4_vec_ntsc_j_mode_set(struct vc4_vec *vec)
> 
> -{
> 
> -	struct drm_device *drm = vec->connector.dev;
> 
> -	int idx;
> 
> -
> 
> -	if (!drm_dev_enter(drm, &idx))
> 
> -		return;
> 
> -
> 
> -	VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_NTSC_STD);
> 
> -	VEC_WRITE(VEC_CONFIG1, VEC_CONFIG1_C_CVBS_CVBS);
> 
> -
> 
> -	drm_dev_exit(idx);
> 
> -}
> 
> -
> 
>  static const struct drm_display_mode ntsc_mode = {
> 
>  	DRM_MODE("720x480", DRM_MODE_TYPE_DRIVER, 13500,
> 
>  		 720, 720 + 14, 720 + 14 + 64, 720 + 14 + 64 + 60, 0,
> 
> @@ -259,37 +233,6 @@ static const struct drm_display_mode ntsc_mode = {
> 
>  		 DRM_MODE_FLAG_INTERLACE)
> 
>  };
> 
>  
> 
> -static void vc4_vec_pal_mode_set(struct vc4_vec *vec)
> 
> -{
> 
> -	struct drm_device *drm = vec->connector.dev;
> 
> -	int idx;
> 
> -
> 
> -	if (!drm_dev_enter(drm, &idx))
> 
> -		return;
> 
> -
> 
> -	VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_PAL_BDGHI_STD);
> 
> -	VEC_WRITE(VEC_CONFIG1, VEC_CONFIG1_C_CVBS_CVBS);
> 
> -
> 
> -	drm_dev_exit(idx);
> 
> -}
> 
> -
> 
> -static void vc4_vec_pal_m_mode_set(struct vc4_vec *vec)
> 
> -{
> 
> -	struct drm_device *drm = vec->connector.dev;
> 
> -	int idx;
> 
> -
> 
> -	if (!drm_dev_enter(drm, &idx))
> 
> -		return;
> 
> -
> 
> -	VEC_WRITE(VEC_CONFIG0, VEC_CONFIG0_PAL_BDGHI_STD);
> 
> -	VEC_WRITE(VEC_CONFIG1,
> 
> -		  VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ);
> 
> -	VEC_WRITE(VEC_FREQ3_2, 0x223b);
> 
> -	VEC_WRITE(VEC_FREQ1_0, 0x61d1);
> 
> -
> 
> -	drm_dev_exit(idx);
> 
> -}
> 
> -
> 
>  static const struct drm_display_mode pal_mode = {
> 
>  	DRM_MODE("720x576", DRM_MODE_TYPE_DRIVER, 13500,
> 
>  		 720, 720 + 20, 720 + 20 + 64, 720 + 20 + 64 + 60, 0,
> 
> @@ -300,19 +243,24 @@ static const struct drm_display_mode pal_mode = {
> 
>  static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
> 
>  	[VC4_VEC_TV_MODE_NTSC] = {
> 
>  		.mode = &ntsc_mode,
> 
> -		.mode_set = vc4_vec_ntsc_mode_set,
> 
> +		.config0 = VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN,
> 
> +		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
>  	[VC4_VEC_TV_MODE_NTSC_J] = {
> 
>  		.mode = &ntsc_mode,
> 
> -		.mode_set = vc4_vec_ntsc_j_mode_set,
> 
> +		.config0 = VEC_CONFIG0_NTSC_STD,
> 
> +		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
>  	[VC4_VEC_TV_MODE_PAL] = {
> 
>  		.mode = &pal_mode,
> 
> -		.mode_set = vc4_vec_pal_mode_set,
> 
> +		.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
> 
> +		.config1 = VEC_CONFIG1_C_CVBS_CVBS,
> 
>  	},
> 
>  	[VC4_VEC_TV_MODE_PAL_M] = {
> 
>  		.mode = &pal_mode,
> 
> -		.mode_set = vc4_vec_pal_m_mode_set,
> 
> +		.config0 = VEC_CONFIG0_PAL_BDGHI_STD,
> 
> +		.config1 = VEC_CONFIG1_C_CVBS_CVBS | VEC_CONFIG1_CUSTOM_FREQ,
> 
> +		.custom_freq = 0x223b61d1,
> 
>  	},
> 
>  };
> 
>  
> 
> @@ -470,7 +418,16 @@ static void vc4_vec_encoder_enable(struct drm_encoder *encoder,
> 
>  	/* Mask all interrupts. */
> 
>  	VEC_WRITE(VEC_MASK0, 0);
> 
>  
> 
> -	vec->tv_mode->mode_set(vec);
> 
> +	VEC_WRITE(VEC_CONFIG0, vec->tv_mode->config0);
> 
> +	VEC_WRITE(VEC_CONFIG1, vec->tv_mode->config1);
> 
> +
> 
> +	if (vec->tv_mode->custom_freq != 0) {

Nit: '!= 0' is not necessary and not common either in kernel code.

Reviewed-by: Noralf Trønnes <noralf@xxxxxxxxxxx>

> 
> +		VEC_WRITE(VEC_FREQ3_2,
> 
> +			  (vec->tv_mode->custom_freq >> 16) &
> 
> +			  0xffff);
> 
> +		VEC_WRITE(VEC_FREQ1_0,
> 
> +			  vec->tv_mode->custom_freq & 0xffff);
> 
> +	}
> 
>  
> 
>  	VEC_WRITE(VEC_DAC_MISC,
> 
>  		  VEC_DAC_MISC_VID_ACT | VEC_DAC_MISC_DAC_RST_N);
> 
> 
>