Le 13/08/24 - 12:44, José Expósito a écrit :
> A future patch will allow to create multiple connectors. Use managed
> memory to simplify the code.
>
> Refactor, no functional changes.
>
> Signed-off-by: José Expósito <jose.exposit...@gmail.com>
> ---
> drivers/gpu/drm/vkms/vkms_drv.h | 5 ---
> drivers/gpu/drm/vkms/vkms_output.c | 53 +++++++++++++++++-------------
> 2 files changed, 31 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index 2466e8b0231f..cac37d21654a 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -121,14 +121,9 @@ struct vkms_crtc {
>
> struct vkms_config;
>
> -struct vkms_output {
> - struct drm_connector connector;
> -};
> -
> struct vkms_device {
> struct drm_device drm;
> struct platform_device *platform;
> - struct vkms_output output;
> struct list_head crtcs;
> const struct vkms_config *config;
> };
> diff --git a/drivers/gpu/drm/vkms/vkms_output.c
> b/drivers/gpu/drm/vkms/vkms_output.c
> index 7afe37aea52d..4413cf88afc7 100644
> --- a/drivers/gpu/drm/vkms/vkms_output.c
> +++ b/drivers/gpu/drm/vkms/vkms_output.c
> @@ -9,7 +9,6 @@
>
> static const struct drm_connector_funcs vkms_connector_funcs = {
> .fill_modes = drm_helper_probe_single_connector_modes,
> - .destroy = drm_connector_cleanup,
> .reset = drm_atomic_helper_connector_reset,
> .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> @@ -29,6 +28,33 @@ static const struct drm_connector_helper_funcs
> vkms_conn_helper_funcs = {
> .get_modes = vkms_conn_get_modes,
> };
>
> +static struct drm_connector *vkms_connector_init(struct vkms_device
> *vkms_device,
> + uint32_t possible_encoders)
> +{
> + struct drm_connector *connector;
> + int ret;
> +
> + connector = drmm_kzalloc(&vkms_device->drm, sizeof(*connector),
> GFP_KERNEL);
> + if (!connector) {
> + DRM_ERROR("Failed to allocate connector\n");
> + return ERR_PTR(-ENOMEM);
> + }
> +
> + ret = drmm_connector_init(&vkms_device->drm, connector,
> + &vkms_connector_funcs,
> + DRM_MODE_CONNECTOR_VIRTUAL, NULL);
> + if (ret) {
> + DRM_ERROR("Failed to init connector\n");
> + kfree(connector);
Again, connector is allocated with drmm_kzalloc, so drmm_kfree or nothing.
> + return ERR_PTR(ret);
> + }
> +
> + connector->possible_encoders = possible_encoders;
> + drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
> +
> + return connector;
> +}
> +
> static struct drm_encoder *vkms_encoder_init(struct vkms_device *vkms_device,
> uint32_t possible_crtcs,
> unsigned int index)
> @@ -72,9 +98,8 @@ static int vkms_add_overlay_plane(struct vkms_device
> *vkmsdev, int index)
>
> int vkms_output_init(struct vkms_device *vkmsdev, int index)
> {
> - struct vkms_output *output = &vkmsdev->output;
> struct drm_device *dev = &vkmsdev->drm;
> - struct drm_connector *connector = &output->connector;
> + struct drm_connector *connector;
> struct drm_encoder *encoder;
> struct vkms_config_encoder *encoder_cfg;
> struct vkms_crtc *vkms_crtc;
> @@ -117,14 +142,9 @@ int vkms_output_init(struct vkms_device *vkmsdev, int
> index)
> }
> }
>
> - ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
> - DRM_MODE_CONNECTOR_VIRTUAL);
> - if (ret) {
> - DRM_ERROR("Failed to init connector\n");
> - return ret;
> - }
> -
> - drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
> + connector = vkms_connector_init(vkmsdev, BIT(index));
As for CRTC, you can create multiple encoder but connector is always
attached to the first? I assume this is intentionnal? Maybe you can attach
it to all the created encoders?
> + if (IS_ERR(connector))
> + return PTR_ERR(connector);
>
> list_for_each_entry(encoder_cfg, &vkmsdev->config->encoders, list) {
> encoder = vkms_encoder_init(vkmsdev,
> encoder_cfg->possible_crtcs,
> @@ -133,18 +153,7 @@ int vkms_output_init(struct vkms_device *vkmsdev, int
> index)
> return PTR_ERR(encoder);
> }
>
> - ret = drm_connector_attach_encoder(connector, encoder);
> - if (ret) {
> - DRM_ERROR("Failed to attach connector to encoder\n");
> - goto err_attach;
> - }
> -
The encoder is not attached to the connector?
> drm_mode_config_reset(dev);
>
> return 0;
> -
> -err_attach:
> - drm_connector_cleanup(connector);
> -
> - return ret;
> }
> --
> 2.46.0
>
--
Louis Chauvet, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
