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