On Fri, Oct 28, 2016 at 3:28 AM, Rongrong Zou <zourongrong@xxxxxxxxx> wrote:
> Add connector funcs and helper funcs for VDAC.
>
> Signed-off-by: Rongrong Zou <zourongrong@xxxxxxxxx>
> ---
> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 8 +++
> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 2 +
> drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c | 76 ++++++++++++++++++++++++
> 3 files changed, 86 insertions(+)
>
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> index ba191e1..4253603 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> @@ -131,6 +131,14 @@ static int hibmc_kms_init(struct hibmc_drm_device *hidev)
> return ret;
> }
>
> + ret = hibmc_connector_init(hidev);
> + if (ret) {
> + DRM_ERROR("failed to init connector\n");
> + return ret;
> + }
> +
> + drm_mode_connector_attach_encoder(&hidev->connector,
> + &hidev->encoder);
The connector should be initialized in the vdac driver with the
encoder, not in the drv file (same as plane/crtc)
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> index 401cea4..450247d 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> @@ -48,6 +48,7 @@ struct hibmc_drm_device {
> struct drm_plane plane;
> struct drm_crtc crtc;
> struct drm_encoder encoder;
> + struct drm_connector connector;
No need to keep track here
> bool mode_config_initialized;
>
> /* ttm */
> @@ -89,6 +90,7 @@ static inline struct hibmc_bo *gem_to_hibmc_bo(struct drm_gem_object *gem)
> int hibmc_plane_init(struct hibmc_drm_device *hidev);
> int hibmc_crtc_init(struct hibmc_drm_device *hidev);
> int hibmc_encoder_init(struct hibmc_drm_device *hidev);
> +int hibmc_connector_init(struct hibmc_drm_device *hidev);
> int hibmc_fbdev_init(struct hibmc_drm_device *hidev);
> void hibmc_fbdev_fini(struct hibmc_drm_device *hidev);
>
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
> index 953f659..ebefcd1 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_vdac.c
> @@ -87,3 +87,79 @@ int hibmc_encoder_init(struct hibmc_drm_device *hidev)
> drm_encoder_helper_add(encoder, &hibmc_encoder_helper_funcs);
> return 0;
> }
> +
> +static int hibmc_connector_get_modes(struct drm_connector *connector)
> +{
> + int count;
> +
> + count = drm_add_modes_noedid(connector, 800, 600);
> + drm_set_preferred_mode(connector, defx, defy);
So you have defx/defy as module parameters, but then hardcode the
800x600 mode. If defx/defy is anything other than 800/600, this won't
work. I think you should just remove the defx/defy module params and
rely on userspace adding modes as appropriate.
> + return count;
> +}
> +
> +static int hibmc_connector_mode_valid(struct drm_connector *connector,
> + struct drm_display_mode *mode)
> +{
> + struct hibmc_drm_device *hiprivate =
> + container_of(connector, struct hibmc_drm_device, connector);
> + unsigned long size = mode->hdisplay * mode->vdisplay * 4;
Why * 4 here and why * 2 below? You support formats less than 32 bpp,
so the * 4 isn't necessarily correct for all formats. Is the * 2 to
account for front & back buffer?
> +
> + if (size * 2 > hiprivate->fb_size)
> + return MODE_BAD;
> +
> + return MODE_OK;
> +}
> +
> +static struct drm_encoder *
> +hibmc_connector_best_encoder(struct drm_connector *connector)
> +{
> + int enc_id = connector->encoder_ids[0];
> +
> + /* pick the encoder ids */
> + if (enc_id)
> + return drm_encoder_find(connector->dev, enc_id);
Can't you just do return drm_encoder_find(connector->dev,
connector->encoder_ids[0]); ?
ie: won't drm_encoder_find do the right thing if you pass in id == 0?
> +
> + return NULL;
> +}
> +
> +static enum drm_connector_status hibmc_connector_detect(struct drm_connector
> + *connector, bool force)
> +{
> + return connector_status_connected;
Perhaps this should be connector_status_unknown, since you don't
necessarily know it's connected.
> +}
> +
> +static const struct drm_connector_helper_funcs
> + hibmc_connector_connector_helper_funcs = {
> + .get_modes = hibmc_connector_get_modes,
> + .mode_valid = hibmc_connector_mode_valid,
> + .best_encoder = hibmc_connector_best_encoder,
> +};
> +
> +static const struct drm_connector_funcs hibmc_connector_connector_funcs = {
> + .dpms = drm_atomic_helper_connector_dpms,
> + .detect = hibmc_connector_detect,
> + .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,
> +};
> +
> +int hibmc_connector_init(struct hibmc_drm_device *hidev)
> +{
> + struct drm_device *dev = hidev->dev;
> + struct drm_connector *connector = &hidev->connector;
> + int ret;
> +
> + ret = drm_connector_init(dev, connector,
> + &hibmc_connector_connector_funcs,
> + DRM_MODE_CONNECTOR_VGA);
> + if (ret) {
> + DRM_ERROR("failed to init connector\n");
> + return ret;
> + }
> + drm_connector_helper_add(connector,
> + &hibmc_connector_connector_helper_funcs);
> +
> + return 0;
> +}
> --
> 1.9.1
>
>
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