Re: [PATCH v1 05/35] drm/connector: Add TV standard property

From: Noralf Trønnes
Date: Sat Aug 20 2022 - 16:13:01 EST

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Den 29.07.2022 18.34, skrev Maxime Ripard:
> The TV mode property has been around for a while now to select and get the
> current TV mode output on an analog TV connector.
>
> Despite that property name being generic, its content isn't and has been
> driver-specific which makes it hard to build any generic behaviour on top
> of it, both in kernel and user-space.
>
> Let's create a new bitmask tv norm property, that can contain any of the
> analog TV standards currently supported by kernel drivers. Each driver can
> then pass in a bitmask of the modes it supports.
>
> We'll then be able to phase out the older tv mode property.
>
> Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
>
> diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> index c06d0639d552..d7ff6c644c2f 100644
> --- a/drivers/gpu/drm/drm_atomic_uapi.c
> +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> @@ -700,6 +700,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
> state->tv.margins.bottom = val;
> } else if (property == config->tv_mode_property) {
> state->tv.mode = val;
> + } else if (property == config->tv_norm_property) {
> + state->tv.norm = val;
> } else if (property == config->tv_brightness_property) {
> state->tv.brightness = val;
> } else if (property == config->tv_contrast_property) {
> @@ -810,6 +812,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector,
> *val = state->tv.margins.bottom;
> } else if (property == config->tv_mode_property) {
> *val = state->tv.mode;
> + } else if (property == config->tv_norm_property) {
> + *val = state->tv.norm;
> } else if (property == config->tv_brightness_property) {
> *val = state->tv.brightness;
> } else if (property == config->tv_contrast_property) {
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index e3142c8142b3..68a4e47f85a9 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -1637,6 +1637,7 @@ EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
> /**
> * drm_mode_create_tv_properties - create TV specific connector properties
> * @dev: DRM device
> + * @supported_tv_norms: Bitmask of TV norms supported (See DRM_MODE_TV_NORM_*)
> * @num_modes: number of different TV formats (modes) supported
> * @modes: array of pointers to strings containing name of each format
> *
> @@ -1649,11 +1650,40 @@ EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
> * 0 on success or a negative error code on failure.
> */
> int drm_mode_create_tv_properties(struct drm_device *dev,
> + unsigned int supported_tv_norms,
> unsigned int num_modes,
> const char * const modes[])
> {
> + static const struct drm_prop_enum_list tv_norm_values[] = {
> + { __builtin_ffs(DRM_MODE_TV_NORM_NTSC_443) - 1, "NTSC-443" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_NTSC_J) - 1, "NTSC-J" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_NTSC_M) - 1, "NTSC-M" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_60) - 1, "PAL-60" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_B) - 1, "PAL-B" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_D) - 1, "PAL-D" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_G) - 1, "PAL-G" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_H) - 1, "PAL-H" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_I) - 1, "PAL-I" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_M) - 1, "PAL-M" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_N) - 1, "PAL-N" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_PAL_NC) - 1, "PAL-Nc" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_60) - 1, "SECAM-60" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_B) - 1, "SECAM-B" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_D) - 1, "SECAM-D" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_G) - 1, "SECAM-G" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_K) - 1, "SECAM-K" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_K1) - 1, "SECAM-K1" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_L) - 1, "SECAM-L" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_HD480I) - 1, "hd480i" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_HD480P) - 1, "hd480p" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_HD576I) - 1, "hd576i" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_HD576P) - 1, "hd576p" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_HD720P) - 1, "hd720p" },
> + { __builtin_ffs(DRM_MODE_TV_NORM_HD1080I) - 1, "hd1080i" },
> + };
> struct drm_property *tv_selector;
> struct drm_property *tv_subconnector;
> + struct drm_property *tv_norm;
> unsigned int i;
>
> if (dev->mode_config.tv_select_subconnector_property)
> @@ -1686,6 +1716,13 @@ int drm_mode_create_tv_properties(struct drm_device *dev,
> if (drm_mode_create_tv_margin_properties(dev))
> goto nomem;
>
> + tv_norm = drm_property_create_bitmask(dev, 0, "tv norm",
> + tv_norm_values, ARRAY_SIZE(tv_norm_values),
> + supported_tv_norms);
> + if (!tv_norm)
> + goto nomem;
> + dev->mode_config.tv_norm_property = tv_norm;
> +
> dev->mode_config.tv_mode_property =
> drm_property_create(dev, DRM_MODE_PROP_ENUM,
> "mode", num_modes);
> diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
> index 4a788c1c9058..457529e5d857 100644
> --- a/drivers/gpu/drm/vc4/vc4_vec.c
> +++ b/drivers/gpu/drm/vc4/vc4_vec.c
> @@ -573,7 +573,9 @@ static int vc4_vec_bind(struct device *dev, struct device *master, void *data)
> struct vc4_vec *vec;
> int ret;
>
> - ret = drm_mode_create_tv_properties(drm, ARRAY_SIZE(tv_mode_names),
> + ret = drm_mode_create_tv_properties(drm,
> + 0,
> + ARRAY_SIZE(tv_mode_names),
> tv_mode_names);
> if (ret)
> return ret;
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 1e9996b33cc8..78275e68ff66 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -143,6 +143,32 @@ enum subpixel_order {
>
> };
>
> +#define DRM_MODE_TV_NORM_NTSC_443 (1 << 0)
> +#define DRM_MODE_TV_NORM_NTSC_J (1 << 1)
> +#define DRM_MODE_TV_NORM_NTSC_M (1 << 2)
> +#define DRM_MODE_TV_NORM_PAL_60 (1 << 3)
> +#define DRM_MODE_TV_NORM_PAL_B (1 << 4)
> +#define DRM_MODE_TV_NORM_PAL_D (1 << 5)
> +#define DRM_MODE_TV_NORM_PAL_G (1 << 6)
> +#define DRM_MODE_TV_NORM_PAL_H (1 << 7)
> +#define DRM_MODE_TV_NORM_PAL_I (1 << 8)
> +#define DRM_MODE_TV_NORM_PAL_M (1 << 9)
> +#define DRM_MODE_TV_NORM_PAL_N (1 << 10)
> +#define DRM_MODE_TV_NORM_PAL_NC (1 << 11)
> +#define DRM_MODE_TV_NORM_SECAM_60 (1 << 12)
> +#define DRM_MODE_TV_NORM_SECAM_B (1 << 13)
> +#define DRM_MODE_TV_NORM_SECAM_D (1 << 14)
> +#define DRM_MODE_TV_NORM_SECAM_G (1 << 15)
> +#define DRM_MODE_TV_NORM_SECAM_K (1 << 16)
> +#define DRM_MODE_TV_NORM_SECAM_K1 (1 << 17)
> +#define DRM_MODE_TV_NORM_SECAM_L (1 << 18)
> +#define DRM_MODE_TV_NORM_HD480I (1 << 19)
> +#define DRM_MODE_TV_NORM_HD480P (1 << 20)
> +#define DRM_MODE_TV_NORM_HD576I (1 << 21)
> +#define DRM_MODE_TV_NORM_HD576P (1 << 22)
> +#define DRM_MODE_TV_NORM_HD720P (1 << 23)
> +#define DRM_MODE_TV_NORM_HD1080I (1 << 24)
> +

This is an area where DRM overlaps with v4l2, see:
- include/dt-bindings/display/sdtv-standards.h
- v4l2_norm_to_name()

Maybe we should follow suit, but if we do our own thing please mention
why in the commit message.

Noralf.

> /**
> * struct drm_scrambling: sink's scrambling support.
> */
> @@ -687,6 +713,7 @@ struct drm_tv_connector_state {
> enum drm_mode_subconnector subconnector;
> struct drm_connector_tv_margins margins;
> unsigned int mode;
> + unsigned int norm;
> unsigned int brightness;
> unsigned int contrast;
> unsigned int flicker_reduction;
> @@ -1779,6 +1806,7 @@ void drm_connector_attach_dp_subconnector_property(struct drm_connector *connect
>
> int drm_mode_create_tv_margin_properties(struct drm_device *dev);
> int drm_mode_create_tv_properties(struct drm_device *dev,
> + unsigned int supported_tv_norms,
> unsigned int num_modes,
> const char * const modes[]);
> void drm_connector_attach_tv_margin_properties(struct drm_connector *conn);
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index 6b5e01295348..d9e79def8b92 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -704,6 +704,12 @@ struct drm_mode_config {
> */
> struct drm_property *dp_subconnector_property;
>
> + /**
> + * @tv_norm_property: Optional TV property to select the TV
> + * standard output on the connector.
> + */
> + struct drm_property *tv_norm_property;
> +
> /**
> * @tv_subconnector_property: Optional TV property to differentiate
> * between different TV connector types.
>

Next message: Martin Povišer: "Re: [PATCH] i2c: pasemi: Add IRQ support for Apple Silicon"
Previous message: kernel test robot: "drivers/message/fusion/mptlan.c:1177:21: sparse: sparse: cast to restricted __le16"
In reply to: Geert Uytterhoeven: "Re: [PATCH v1 05/35] drm/connector: Add TV standard property"
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