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SubjectRe: [PATCH drm/hisilicon v2 2/2] drm/hisilicon: Features to support reading resolutions from EDID
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Am 22.09.20 um 09:03 schrieb Tian Tao:
> Use drm_get_edid to get the resolution, if that fails, set it to
> a fixed resolution. Rewrite the desrtoy callback function to release
> resources.
>
> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 38 +++++++++++++++++++++---
> 1 file changed, 34 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
> index 376a05d..c6999ed 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
> @@ -21,12 +21,24 @@
> static int hibmc_connector_get_modes(struct drm_connector *connector)
> {
> int count;
> + void *edid;
> + struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
> +
> + edid = drm_get_edid(connector, &hibmc_connector->adapter);
> + if (edid) {
> + drm_connector_update_edid_property(connector, edid);
> + count = drm_add_edid_modes(connector, edid);
> + if (count)
> + goto out;
> + }
>
> count = drm_add_modes_noedid(connector,
> connector->dev->mode_config.max_width,
> connector->dev->mode_config.max_height);
> drm_set_preferred_mode(connector, 1024, 768);
>
> +out:
> + kfree(edid);
> return count;
> }
>
> @@ -36,6 +48,14 @@ static enum drm_mode_status hibmc_connector_mode_valid(struct drm_connector *con
> return MODE_OK;
> }
>
> +static void hibmc_connector_destroy(struct drm_connector *connector)
> +{
> + struct hibmc_connector *hibmc_connector = to_hibmc_connector(connector);
> +
> + i2c_del_adapter(&hibmc_connector->adapter);
> + drm_connector_cleanup(connector);
> +}
> +
> static const struct drm_connector_helper_funcs
> hibmc_connector_helper_funcs = {
> .get_modes = hibmc_connector_get_modes,
> @@ -44,7 +64,7 @@ static const struct drm_connector_helper_funcs
>
> static const struct drm_connector_funcs hibmc_connector_funcs = {
> .fill_modes = drm_helper_probe_single_connector_modes,
> - .destroy = drm_connector_cleanup,
> + .destroy = hibmc_connector_destroy,
> .reset = drm_atomic_helper_connector_reset,
> .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> @@ -77,10 +97,17 @@ static const struct drm_encoder_funcs hibmc_encoder_funcs = {
> int hibmc_vdac_init(struct hibmc_drm_private *priv)
> {
> struct drm_device *dev = priv->dev;
> + struct hibmc_connector *hibmc_connector = &priv->connector;
> struct drm_encoder *encoder = &priv->encoder;
> - struct drm_connector *connector = &priv->connector;
> + struct drm_connector *connector = &hibmc_connector->base;
> int ret;
>
> + ret = hibmc_ddc_create(dev, hibmc_connector);
> + if (ret) {
> + drm_err(dev, "failed to create ddc: %d\n", ret);
> + return ret;
> + }
> +
> encoder->possible_crtcs = 0x1;
> ret = drm_encoder_init(dev, encoder, &hibmc_encoder_funcs,
> DRM_MODE_ENCODER_DAC, NULL);
> @@ -91,12 +118,15 @@ int hibmc_vdac_init(struct hibmc_drm_private *priv)
>
> drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
>
> - ret = drm_connector_init(dev, connector, &hibmc_connector_funcs,
> - DRM_MODE_CONNECTOR_VGA);
> + ret = drm_connector_init_with_ddc(dev, connector,
> + &hibmc_connector_funcs,
> + DRM_MODE_CONNECTOR_VGA,
> + &hibmc_connector->adapter);
> if (ret) {
> drm_err(dev, "failed to init connector: %d\n", ret);
> return ret;
> }
> +
> drm_connector_helper_add(connector, &hibmc_connector_helper_funcs);
>
> drm_connector_attach_encoder(connector, encoder);
>

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

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