Re: [PATCH v2 31/33] drm/vc4: vec: Convert to the new TV mode property

From: Noralf Trønnes
Date: Sat Sep 24 2022 - 13:10:00 EST

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Den 22.09.2022 16.25, 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.
>

You can mention here that atomic_check is added in order to trigger a
modeset should tv.mode change.

> 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 6828b79a1001..a9463364015b 100644
> --- a/drivers/gpu/drm/vc4/vc4_vec.c
> +++ b/drivers/gpu/drm/vc4/vc4_vec.c
> @@ -172,6 +172,8 @@ struct vc4_vec {
>
> struct clk *clock;
>
> + struct drm_property *legacy_tv_mode_property;
> +
> struct debugfs_regset32 regset;
> };
>
> @@ -184,6 +186,12 @@ encoder_to_vc4_vec(struct drm_encoder *encoder)
> return container_of(encoder, struct vc4_vec, encoder.base);
> }
>
> +static inline struct vc4_vec *
> +connector_to_vc4_vec(struct drm_connector *connector)
> +{
> + return container_of(connector, struct vc4_vec, connector);
> +}
> +
> enum vc4_vec_tv_mode_id {
> VC4_VEC_TV_MODE_NTSC,
> VC4_VEC_TV_MODE_NTSC_J,
> @@ -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;
> @@ -225,43 +233,51 @@ static const struct debugfs_reg32 vec_regs[] = {
> VC4_REG32(VEC_DAC_MISC),
> };
>
> -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,
> - 480, 480 + 7, 480 + 7 + 6, 525, 0,
> - DRM_MODE_FLAG_INTERLACE)
> -};
> -
> -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,
> - 576, 576 + 4, 576 + 4 + 6, 625, 0,
> - DRM_MODE_FLAG_INTERLACE)
> -};
> -
> static const struct vc4_vec_tv_mode vc4_vec_tv_modes[] = {
> - [VC4_VEC_TV_MODE_NTSC] = {
> - .mode = &ntsc_mode,
> + {
> + .mode = DRM_MODE_TV_MODE_NTSC,
> .config0 = VEC_CONFIG0_NTSC_STD | VEC_CONFIG0_PDEN,
> .config1 = VEC_CONFIG1_C_CVBS_CVBS,
> },
> - [VC4_VEC_TV_MODE_NTSC_J] = {
> - .mode = &ntsc_mode,
> + {
> + .mode = DRM_MODE_TV_MODE_NTSC_J,
> .config0 = VEC_CONFIG0_NTSC_STD,
> .config1 = VEC_CONFIG1_C_CVBS_CVBS,
> },
> - [VC4_VEC_TV_MODE_PAL] = {
> - .mode = &pal_mode,
> + {
> + .mode = DRM_MODE_TV_MODE_PAL,
> .config0 = VEC_CONFIG0_PAL_BDGHI_STD,
> .config1 = VEC_CONFIG1_C_CVBS_CVBS,
> },
> - [VC4_VEC_TV_MODE_PAL_M] = {
> - .mode = &ntsc_mode,
> + {
> + .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[] = {
> + { 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", },
> +};
> +
> static enum drm_connector_status
> vc4_vec_connector_detect(struct drm_connector *connector, bool force)
> {
> @@ -276,19 +292,99 @@ static void vc4_vec_connector_reset(struct drm_connector *connector)
>
> static int vc4_vec_connector_get_modes(struct drm_connector *connector)
> {
> - struct drm_connector_state *state = connector->state;
> struct drm_display_mode *mode;
> + int count = 0;
>
> - mode = drm_mode_duplicate(connector->dev,
> - vc4_vec_tv_modes[state->tv.legacy_mode].mode);
> + mode = drm_mode_analog_ntsc_480i(connector->dev);
> if (!mode) {
> DRM_ERROR("Failed to create a new display mode\n");
> return -ENOMEM;
> }
>
> + mode->type |= DRM_MODE_TYPE_PREFERRED;
> drm_mode_probed_add(connector, mode);
> + count += 1;
>
> - return 1;
> + mode = drm_mode_analog_pal_576i(connector->dev);
> + if (!mode) {
> + DRM_ERROR("Failed to create a new display mode\n");
> + return -ENOMEM;
> + }
> +
> + drm_mode_probed_add(connector, mode);
> + count += 1;
> +
> + return count;

Why not just return 2 here since that's the only value count can be.

Acked-by: Noralf Trønnes <noralf@xxxxxxxxxxx>

> +}
> +
> +static int
> +vc4_vec_connector_set_property(struct drm_connector *connector,
> + struct drm_connector_state *state,
> + struct drm_property *property,
> + uint64_t val)
> +{
> + struct vc4_vec *vec = connector_to_vc4_vec(connector);
> +
> + if (property != vec->legacy_tv_mode_property)
> + return -EINVAL;
> +
> + switch (val) {
> + case VC4_VEC_TV_MODE_NTSC:
> + state->tv.mode = DRM_MODE_TV_MODE_NTSC;
> + break;
> +
> + case VC4_VEC_TV_MODE_NTSC_J:
> + state->tv.mode = DRM_MODE_TV_MODE_NTSC_J;
> + break;
> +
> + case VC4_VEC_TV_MODE_PAL:
> + state->tv.mode = DRM_MODE_TV_MODE_PAL;
> + break;
> +
> + case VC4_VEC_TV_MODE_PAL_M:
> + state->tv.mode = DRM_MODE_TV_MODE_PAL_M;
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +vc4_vec_connector_get_property(struct drm_connector *connector,
> + const struct drm_connector_state *state,
> + struct drm_property *property,
> + uint64_t *val)
> +{
> + struct vc4_vec *vec = connector_to_vc4_vec(connector);
> +
> + if (property != vec->legacy_tv_mode_property)
> + return -EINVAL;
> +
> + switch (state->tv.mode) {
> + case DRM_MODE_TV_MODE_NTSC:
> + *val = VC4_VEC_TV_MODE_NTSC;
> + break;
> +
> + case DRM_MODE_TV_MODE_NTSC_J:
> + *val = VC4_VEC_TV_MODE_NTSC_J;
> + break;
> +
> + case DRM_MODE_TV_MODE_PAL:
> + *val = VC4_VEC_TV_MODE_PAL;
> + break;
> +
> + case DRM_MODE_TV_MODE_PAL_M:
> + *val = VC4_VEC_TV_MODE_PAL_M;
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> }
>
> static const struct drm_connector_funcs vc4_vec_connector_funcs = {
> @@ -297,15 +393,19 @@ static const struct drm_connector_funcs vc4_vec_connector_funcs = {
> .reset = vc4_vec_connector_reset,
> .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> + .atomic_get_property = vc4_vec_connector_get_property,
> + .atomic_set_property = vc4_vec_connector_set_property,
> };
>
> static const struct drm_connector_helper_funcs vc4_vec_connector_helper_funcs = {
> + .atomic_check = drm_atomic_helper_connector_tv_check,
> .get_modes = vc4_vec_connector_get_modes,
> };
>
> static int vc4_vec_connector_init(struct drm_device *dev, struct vc4_vec *vec)
> {
> struct drm_connector *connector = &vec->connector;
> + struct drm_property *prop;
> int ret;
>
> connector->interlace_allowed = true;
> @@ -318,8 +418,16 @@ static int vc4_vec_connector_init(struct drm_device *dev, struct vc4_vec *vec)
> drm_connector_helper_add(connector, &vc4_vec_connector_helper_funcs);
>
> drm_object_attach_property(&connector->base,
> - dev->mode_config.legacy_tv_mode_property,
> - VC4_VEC_TV_MODE_NTSC);
> + dev->mode_config.tv_mode_property,
> + DRM_MODE_TV_MODE_NTSC);
> +
> + prop = drm_property_create_enum(dev, 0, "mode",
> + tv_mode_names, ARRAY_SIZE(tv_mode_names));
> + if (!prop)
> + return -ENOMEM;
> + vec->legacy_tv_mode_property = prop;
> +
> + drm_object_attach_property(&connector->base, prop, VC4_VEC_TV_MODE_NTSC);
>
> drm_connector_attach_encoder(connector, &vec->encoder.base);
>
> @@ -366,13 +474,16 @@ static void vc4_vec_encoder_enable(struct drm_encoder *encoder,
> struct drm_connector *connector = &vec->connector;
> struct drm_connector_state *conn_state =
> drm_atomic_get_new_connector_state(state, connector);
> - const struct vc4_vec_tv_mode *tv_mode =
> - &vc4_vec_tv_modes[conn_state->tv.mode];
> + const struct vc4_vec_tv_mode *tv_mode;
> int idx, ret;
>
> if (!drm_dev_enter(drm, &idx))
> return;
>
> + tv_mode = vc4_vec_tv_mode_lookup(conn_state->tv.mode);
> + if (!tv_mode)
> + goto err_dev_exit;
> +
> ret = pm_runtime_get_sync(&vec->pdev->dev);
> if (ret < 0) {
> DRM_ERROR("Failed to retain power domain: %d\n", ret);
> @@ -454,13 +565,6 @@ static int vc4_vec_encoder_atomic_check(struct drm_encoder *encoder,
> struct drm_connector_state *conn_state)
> {
> const struct drm_display_mode *mode = &crtc_state->adjusted_mode;
> - const struct vc4_vec_tv_mode *vec_mode;
> -
> - vec_mode = &vc4_vec_tv_modes[conn_state->tv.legacy_mode];
> -
> - if (conn_state->crtc &&
> - !drm_mode_equal(vec_mode->mode, &crtc_state->adjusted_mode))
> - return -EINVAL;
>
> if (mode->crtc_hdisplay % 4)
> return -EINVAL;
> @@ -554,13 +658,6 @@ static const struct of_device_id vc4_vec_dt_match[] = {
> { /* sentinel */ },
> };
>
> -static const char * const tv_mode_names[] = {
> - [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",
> -};
> -
> static int vc4_vec_bind(struct device *dev, struct device *master, void *data)
> {
> struct platform_device *pdev = to_platform_device(dev);
> @@ -568,9 +665,11 @@ 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_legacy(drm,
> - ARRAY_SIZE(tv_mode_names),
> - tv_mode_names);
> + ret = drm_mode_create_tv_properties(drm,
> + BIT(DRM_MODE_TV_MODE_NTSC) |
> + BIT(DRM_MODE_TV_MODE_NTSC_J) |
> + BIT(DRM_MODE_TV_MODE_PAL) |
> + BIT(DRM_MODE_TV_MODE_PAL_M));
> if (ret)
> return ret;
>
>

Next message: Noralf Trønnes: "Re: [PATCH v2 32/33] drm/vc4: vec: Add support for more analog TV standards"
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