Re: [PATCH v5 20/22] drm/vc4: vec: Convert to the new TV mode property

Noralf Trønnes
2022-10-17T11:40:42Z

Den 13.10.2022 15.19, 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. We're also making use of
> the new analog TV atomic_check helper to make sure we trigger a modeset
> whenever the TV mode is updated.
>
> Acked-by: Noralf Trønnes <noralf@tronnes.org>
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
>
> ---

> @@ -276,19 +292,96 @@ 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;
>
> - 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);
>
> - return 1;
> + mode = drm_mode_analog_pal_576i(connector->dev);
> + if (!mode) {
> + DRM_ERROR("Failed to create a new display mode\n");
> + return -ENOMEM;

I just remembered that you can't return an error from .get_modes, it
should only return the number of modes added. From doc:

* RETURNS:
*
* The number of modes added by calling drm_mode_probed_add().

See also the use of count in drm_helper_probe_single_connector_modes().

Patch 14 and 22 has the same issue.

Noralf.

> + }
> +
> + drm_mode_probed_add(connector, mode);
> +
> + return 2;
> +}
> +
> +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 +390,19 @@ 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 +415,17 @@ 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",
> + legacy_tv_mode_names,
> + ARRAY_SIZE(legacy_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 +472,16 @@ 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.legacy_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 +563,6 @@ 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 +656,6 @@ 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 +663,11 @@ 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;