diff options
Diffstat (limited to 'drivers/gpu/drm/vkms/vkms_plane.c')
| -rw-r--r-- | drivers/gpu/drm/vkms/vkms_plane.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c new file mode 100644 index 000000000..80e964589 --- /dev/null +++ b/drivers/gpu/drm/vkms/vkms_plane.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/iosys-map.h> + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> + +#include "vkms_drv.h" +#include "vkms_formats.h" + +static const u32 vkms_formats[] = { + DRM_FORMAT_XRGB8888, + DRM_FORMAT_XRGB16161616, + DRM_FORMAT_RGB565 +}; + +static const u32 vkms_plane_formats[] = { + DRM_FORMAT_ARGB8888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_XRGB16161616, + DRM_FORMAT_ARGB16161616, + DRM_FORMAT_RGB565 +}; + +static struct drm_plane_state * +vkms_plane_duplicate_state(struct drm_plane *plane) +{ + struct vkms_plane_state *vkms_state; + struct vkms_frame_info *frame_info; + + vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); + if (!vkms_state) + return NULL; + + frame_info = kzalloc(sizeof(*frame_info), GFP_KERNEL); + if (!frame_info) { + DRM_DEBUG_KMS("Couldn't allocate frame_info\n"); + kfree(vkms_state); + return NULL; + } + + vkms_state->frame_info = frame_info; + + __drm_gem_duplicate_shadow_plane_state(plane, &vkms_state->base); + + return &vkms_state->base.base; +} + +static void vkms_plane_destroy_state(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct vkms_plane_state *vkms_state = to_vkms_plane_state(old_state); + struct drm_crtc *crtc = vkms_state->base.base.crtc; + + if (crtc && vkms_state->frame_info->fb) { + /* dropping the reference we acquired in + * vkms_primary_plane_update() + */ + if (drm_framebuffer_read_refcount(vkms_state->frame_info->fb)) + drm_framebuffer_put(vkms_state->frame_info->fb); + } + + kfree(vkms_state->frame_info); + vkms_state->frame_info = NULL; + + __drm_gem_destroy_shadow_plane_state(&vkms_state->base); + kfree(vkms_state); +} + +static void vkms_plane_reset(struct drm_plane *plane) +{ + struct vkms_plane_state *vkms_state; + + if (plane->state) { + vkms_plane_destroy_state(plane, plane->state); + plane->state = NULL; /* must be set to NULL here */ + } + + vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); + if (!vkms_state) { + DRM_ERROR("Cannot allocate vkms_plane_state\n"); + return; + } + + __drm_gem_reset_shadow_plane(plane, &vkms_state->base); +} + +static const struct drm_plane_funcs vkms_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .reset = vkms_plane_reset, + .atomic_duplicate_state = vkms_plane_duplicate_state, + .atomic_destroy_state = vkms_plane_destroy_state, +}; + +static void vkms_plane_atomic_update(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, + plane); + struct vkms_plane_state *vkms_plane_state; + struct drm_shadow_plane_state *shadow_plane_state; + struct drm_framebuffer *fb = new_state->fb; + struct vkms_frame_info *frame_info; + u32 fmt; + + if (!new_state->crtc || !fb) + return; + + fmt = fb->format->format; + vkms_plane_state = to_vkms_plane_state(new_state); + shadow_plane_state = &vkms_plane_state->base; + + frame_info = vkms_plane_state->frame_info; + memcpy(&frame_info->src, &new_state->src, sizeof(struct drm_rect)); + memcpy(&frame_info->dst, &new_state->dst, sizeof(struct drm_rect)); + frame_info->fb = fb; + memcpy(&frame_info->map, &shadow_plane_state->data, sizeof(frame_info->map)); + drm_framebuffer_get(frame_info->fb); + frame_info->offset = fb->offsets[0]; + frame_info->pitch = fb->pitches[0]; + frame_info->cpp = fb->format->cpp[0]; + vkms_plane_state->pixel_read = get_pixel_conversion_function(fmt); +} + +static int vkms_plane_atomic_check(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, + plane); + struct drm_crtc_state *crtc_state; + bool can_position = false; + int ret; + + if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc)) + return 0; + + crtc_state = drm_atomic_get_crtc_state(state, + new_plane_state->crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + + if (plane->type != DRM_PLANE_TYPE_PRIMARY) + can_position = true; + + ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state, + DRM_PLANE_NO_SCALING, + DRM_PLANE_NO_SCALING, + can_position, true); + if (ret != 0) + return ret; + + /* for now primary plane must be visible and full screen */ + if (!new_plane_state->visible && !can_position) + return -EINVAL; + + return 0; +} + +static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = { + .atomic_update = vkms_plane_atomic_update, + .atomic_check = vkms_plane_atomic_check, + DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, +}; + +struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, + enum drm_plane_type type, int index) +{ + struct drm_device *dev = &vkmsdev->drm; + const struct drm_plane_helper_funcs *funcs; + struct vkms_plane *plane; + const u32 *formats; + int nformats; + + switch (type) { + case DRM_PLANE_TYPE_PRIMARY: + formats = vkms_formats; + nformats = ARRAY_SIZE(vkms_formats); + funcs = &vkms_primary_helper_funcs; + break; + case DRM_PLANE_TYPE_CURSOR: + case DRM_PLANE_TYPE_OVERLAY: + formats = vkms_plane_formats; + nformats = ARRAY_SIZE(vkms_plane_formats); + funcs = &vkms_primary_helper_funcs; + break; + default: + formats = vkms_formats; + nformats = ARRAY_SIZE(vkms_formats); + funcs = &vkms_primary_helper_funcs; + break; + } + + plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index, + &vkms_plane_funcs, + formats, nformats, + NULL, type, NULL); + if (IS_ERR(plane)) + return plane; + + drm_plane_helper_add(&plane->base, funcs); + + return plane; +} |