11/03/2011 05:03 AM, Jesse Barnes ? ?:
> Planes are a bit like half-CRTCs. They have a location and fb, but
> don't drive outputs directly. Add support for handling them to the core
> KMS code.
>
> Signed-off-by: Jesse Barnes<jbarnes at virtuousgeek.org>
> ---
> drivers/gpu/drm/drm_crtc.c | 236
> +++++++++++++++++++++++++++++++++++++++++++-
> drivers/gpu/drm/drm_drv.c | 3 +
> include/drm/drm.h | 3 +
> include/drm/drm_crtc.h | 76 ++++++++++++++-
> include/drm/drm_mode.h | 33 ++++++
> 5 files changed, 348 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index fe738f0..0e129b1 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -535,6 +535,48 @@ void drm_encoder_cleanup(struct drm_encoder *encoder)
> }
> EXPORT_SYMBOL(drm_encoder_cleanup);
>
> +void drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
> + unsigned long possible_crtcs,
> + const struct drm_plane_funcs *funcs,
> + uint32_t *formats, uint32_t format_count)
> +{
> + mutex_lock(&dev->mode_config.mutex);
> +
> + plane->dev = dev;
> + drm_mode_object_get(dev,&plane->base, DRM_MODE_OBJECT_PLANE);
> + plane->funcs = funcs;
> + plane->format_types = kmalloc(sizeof(uint32_t) * format_count,
> + GFP_KERNEL);
> + if (!plane->format_types) {
> + DRM_DEBUG_KMS("out of memory when allocating plane\n");
> + drm_mode_object_put(dev,&plane->base);
> + return;
> + }
> +
> + memcpy(plane->format_types, formats, format_count);
> + plane->format_count = format_count;
> + plane->possible_crtcs = possible_crtcs;
> +
> + list_add_tail(&plane->head,&dev->mode_config.plane_list);
> + dev->mode_config.num_plane++;
> +
> + mutex_unlock(&dev->mode_config.mutex);
> +}
> +EXPORT_SYMBOL(drm_plane_init);
> +
> +void drm_plane_cleanup(struct drm_plane *plane)
> +{
> + struct drm_device *dev = plane->dev;
> +
> + mutex_lock(&dev->mode_config.mutex);
> + kfree(plane->format_types);
> + drm_mode_object_put(dev,&plane->base);
> + list_del(&plane->head);
> + dev->mode_config.num_plane--;
> + mutex_unlock(&dev->mode_config.mutex);
> +}
> +EXPORT_SYMBOL(drm_plane_cleanup);
> +
> /**
> * drm_mode_create - create a new display mode
> * @dev: DRM device
> @@ -866,6 +908,7 @@ void drm_mode_config_init(struct drm_device *dev)
> INIT_LIST_HEAD(&dev->mode_config.encoder_list);
> INIT_LIST_HEAD(&dev->mode_config.property_list);
> INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
> + INIT_LIST_HEAD(&dev->mode_config.plane_list);
> idr_init(&dev->mode_config.crtc_idr);
>
> mutex_lock(&dev->mode_config.mutex);
> @@ -1466,6 +1509,193 @@ out:
> }
>
> /**
> + * drm_mode_getplane_res - get plane info
> + * @dev: DRM device
> + * @data: ioctl data
> + * @file_priv: DRM file info
> + *
> + * Return an plane count and set of IDs.
> + */
> +int drm_mode_getplane_res(struct drm_device *dev, void *data,
> + struct drm_file *file_priv)
> +{
> + struct drm_mode_get_plane_res *plane_resp = data;
> + struct drm_mode_config *config;
> + struct drm_plane *plane;
> + uint32_t __user *plane_ptr;
> + int copied = 0, ret = 0;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + mutex_lock(&dev->mode_config.mutex);
> + config =&dev->mode_config;
> +
> + /*
> + * This ioctl is called twice, once to determine how much space is
> + * needed, and the 2nd time to fill it.
> + */
> + if (config->num_plane&&
> + (plane_resp->count_planes>= config->num_plane)) {
> + plane_ptr = (uint32_t *)(unsigned long)plane_resp->plane_id_ptr;
> +
> + list_for_each_entry(plane,&config->plane_list, head) {
> + if (put_user(plane->base.id, plane_ptr + copied)) {
> + ret = -EFAULT;
> + goto out;
> + }
> + copied++;
> + }
> + }
> + plane_resp->count_planes = config->num_plane;
> +
> +out:
> + mutex_unlock(&dev->mode_config.mutex);
> + return ret;
> +}
> +
> +/**
> + * drm_mode_getplane - get plane info
> + * @dev: DRM device
> + * @data: ioctl data
> + * @file_priv: DRM file info
> + *
> + * Return plane info, including formats supported, gamma size, any
> + * current fb, etc.
> + */
> +int drm_mode_getplane(struct drm_device *dev, void *data,
> + struct drm_file *file_priv)
> +{
> + struct drm_mode_get_plane *plane_resp = data;
> + struct drm_mode_object *obj;
> + struct drm_plane *plane;
> + uint32_t __user *format_ptr;
> + int ret = 0;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + mutex_lock(&dev->mode_config.mutex);
> + obj = drm_mode_object_find(dev, plane_resp->plane_id,
> + DRM_MODE_OBJECT_PLANE);
> + if (!obj) {
> + ret = -EINVAL;
> + goto out;
> + }
> + plane = obj_to_plane(obj);
> +
> + if (plane->crtc)
> + plane_resp->crtc_id = plane->crtc->base.id;
> + else
> + plane_resp->crtc_id = 0;
> +
> + if (plane->fb)
> + plane_resp->fb_id = plane->fb->base.id;
> + else
> + plane_resp->fb_id = 0;
> +
> + plane_resp->plane_id = plane->base.id;
> + plane_resp->possible_crtcs = plane->possible_crtcs;
> + plane_resp->gamma_size = plane->gamma_size;
> +
> + /*
> + * This ioctl is called twice, once to determine how much space is
> + * needed, and the 2nd time to fill it.
> + */
> + if (plane->format_count&&
> + (plane_resp->count_format_types>= plane->format_count)) {
> + format_ptr = (uint32_t *)(unsigned
> long)plane_resp->format_type_ptr;
> + if (copy_to_user(format_ptr,
> + plane->format_types,
> + sizeof(uint32_t) * plane->format_count)) {
> + ret = -EFAULT;
> + goto out;
> + }
> + }
> + plane_resp->count_format_types = plane->format_count;
> +
> +out:
> + mutex_unlock(&dev->mode_config.mutex);
> + return ret;
> +}
> +
> +/**
> + * drm_mode_setplane - set up or tear down an plane
> + * @dev: DRM device
> + * @data: ioctl data*
> + * @file_prive: DRM file info
> + *
> + * Set plane info, including placement, fb, scaling, and other factors.
> + * Or pass a NULL fb to disable.
> + */
> +int drm_mode_setplane(struct drm_device *dev, void *data,
> + struct drm_file *file_priv)
> +{
> + struct drm_mode_set_plane *plane_req = data;
> + struct drm_mode_object *obj;
> + struct drm_plane *plane;
> + struct drm_crtc *crtc;
> + struct drm_framebuffer *fb;
> + int ret = 0;
> +
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EINVAL;
> +
> + mutex_lock(&dev->mode_config.mutex);
> +
> + /*
> + * First, find the plane, crtc, and fb objects. If not available,
> + * we don't bother to call the driver.
> + */
> + obj = drm_mode_object_find(dev, plane_req->plane_id,
> + DRM_MODE_OBJECT_PLANE);
> + if (!obj) {
> + DRM_DEBUG_KMS("Unknown plane ID %d\n",
> + plane_req->plane_id);
> + ret = -EINVAL;
> + goto out;
> + }
> + plane = obj_to_plane(obj);
> +
> + /* No fb means shut it down */
> + if (!plane_req->fb_id) {
> + plane->funcs->disable_plane(plane);
> + goto out;
> + }
> +
> + obj = drm_mode_object_find(dev, plane_req->crtc_id,
> + DRM_MODE_OBJECT_CRTC);
> + if (!obj) {
> + DRM_DEBUG_KMS("Unknown crtc ID %d\n",
> + plane_req->crtc_id);
> + ret = -EINVAL;
> + goto out;
> + }
> + crtc = obj_to_crtc(obj);
> +
> + obj = drm_mode_object_find(dev, plane_req->fb_id,
> + DRM_MODE_OBJECT_FB);
> + if (!obj) {
> + DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
> + plane_req->fb_id);
> + ret = -EINVAL;
> + goto out;
> + }
> + fb = obj_to_fb(obj);
> +
> + ret = plane->funcs->update_plane(plane, crtc, fb,
> + plane_req->crtc_x, plane_req->crtc_y,
> + plane_req->crtc_w, plane_req->crtc_h,
> + plane_req->src_x, plane_req->src_y,
> + plane_req->src_h, plane_req->src_w);
> +
> +out:
> + mutex_unlock(&dev->mode_config.mutex);
> +
> + return ret;
> +}
> +
> +/**
> * drm_mode_setcrtc - set CRTC configuration
> * @inode: inode from the ioctl
> * @filp: file * from the ioctl
> @@ -1688,11 +1918,13 @@ int drm_mode_addfb(struct drm_device *dev,
> return -EINVAL;
>
> if ((config->min_width> r->width) || (r->width> config->max_width)) {
> - DRM_ERROR("mode new framebuffer width not within limits\n");
> + DRM_ERROR("bad framebuffer width %d, should be>= %d&& <= %d\n",
> + r->width, config->min_width, config->max_width);
> return -EINVAL;
> }
> if ((config->min_height> r->height) || (r->height>
> config->max_height)) {
> - DRM_ERROR("mode new framebuffer height not within limits\n");
> + DRM_ERROR("bad framebuffer height %d, should be>= %d&& <=
> %d\n",
> + r->height, config->min_height, config->max_height);
> return -EINVAL;
> }
>
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 93a112d..15da618 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -135,8 +135,11 @@ static struct drm_ioctl_desc drm_ioctls[] = {
> DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl,
> DRM_AUTH|DRM_UNLOCKED),
>
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> + DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> + DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> + DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl,
> DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl,
> DRM_MASTER|DRM_UNLOCKED),
> DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl,
> DRM_MASTER|DRM_UNLOCKED),
> diff --git a/include/drm/drm.h b/include/drm/drm.h
> index 4be33b4..2897967 100644
> --- a/include/drm/drm.h
> +++ b/include/drm/drm.h
> @@ -714,6 +714,9 @@ struct drm_get_cap {
> #define DRM_IOCTL_MODE_CREATE_DUMB DRM_IOWR(0xB2, struct
> drm_mode_create_dumb)
> #define DRM_IOCTL_MODE_MAP_DUMB DRM_IOWR(0xB3, struct drm_mode_map_dumb)
> #define DRM_IOCTL_MODE_DESTROY_DUMB DRM_IOWR(0xB4, struct
> drm_mode_destroy_dumb)
> +#define DRM_IOCTL_MODE_GETPLANERESOURCES DRM_IOWR(0xB5, struct
> drm_mode_get_plane_res)
> +#define DRM_IOCTL_MODE_GETPLANE DRM_IOWR(0xB6, struct
> drm_mode_get_plane)
> +#define DRM_IOCTL_MODE_SETPLANE DRM_IOWR(0xB7, struct
> drm_mode_set_plane)
>
> /**
> * Device specific ioctls should only be in their respective headers
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 8020798..b4519f8 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -44,6 +44,7 @@ struct drm_framebuffer;
> #define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0
> #define DRM_MODE_OBJECT_FB 0xfbfbfbfb
> #define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
> +#define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
>
> struct drm_mode_object {
> uint32_t id;
> @@ -278,6 +279,7 @@ struct drm_crtc;
> struct drm_connector;
> struct drm_encoder;
> struct drm_pending_vblank_event;
> +struct drm_plane;
>
> /**
> * drm_crtc_funcs - control CRTCs for a given device
> @@ -536,6 +538,63 @@ struct drm_connector {
> };
>
> /**
> + * drm_plane_funcs - driver plane control functions
> + * @update_plane: update the plane configuration
> + */
> +struct drm_plane_funcs {
> + int (*update_plane)(struct drm_plane *plane,
> + struct drm_crtc *crtc, struct drm_framebuffer *fb,
> + int crtc_x, int crtc_y,
> + unsigned int crtc_w, unsigned int crtc_h,
> + uint32_t src_x, uint32_t src_y,
> + uint32_t src_w, uint32_t src_h);
> + int (*disable_plane)(struct drm_plane *plane);
> +};
> +
> +/**
> + * drm_plane - central DRM plane control structure
> + * @dev: DRM device this plane belongs to
> + * @kdev: kernel device
> + * @attr: kdev attributes
> + * @head: for list management
> + * @base: base mode object
> + * @possible_crtcs: pipes this plane can be bound to
> + * @format_types: array of formats supported by this plane
> + * @format_count: number of formats supported
> + * @crtc: currently bound CRTC
> + * @fb: currently bound fb
> + * @gamma_size: size of gamma table
> + * @gamma_store: gamma correction table
> + * @enabled: enabled flag
> + * @funcs: helper functions
> + * @helper_private: storage for drver layer
> + */
> +struct drm_plane {
> + struct drm_device *dev;
> + struct device kdev;
> + struct device_attribute *attr;
> + struct list_head head;
> +
> + struct drm_mode_object base;
> +
> + uint32_t possible_crtcs;
> + uint32_t *format_types;
> + uint32_t format_count;
> +
> + struct drm_crtc *crtc;
> + struct drm_framebuffer *fb;
Where are crtc and fb of struct drm_plane assigned?
First, i did it in device specific update_plane, but can do in
drm_mode_setplane?
