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// SPDX-License-Identifier: GPL-2.0
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include "vkms_drv.h"
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
static const struct drm_plane_funcs vkms_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
static void vkms_primary_plane_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
}
static int vkms_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct drm_crtc_state *crtc_state;
int ret;
if (!state->fb | !state->crtc)
return 0;
crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
ret = drm_atomic_helper_check_plane_state(state, crtc_state,
DRM_PLANE_HELPER_NO_SCALING,
DRM_PLANE_HELPER_NO_SCALING,
false, true);
if (ret != 0)
return ret;
/* for now primary plane must be visible and full screen */
if (!state->visible)
return -EINVAL;
return 0;
}
static int vkms_prepare_fb(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct drm_gem_object *gem_obj;
struct vkms_gem_object *vkms_obj;
int ret;
if (!state->fb)
return 0;
gem_obj = drm_gem_fb_get_obj(state->fb, 0);
vkms_obj = drm_gem_to_vkms_gem(gem_obj);
ret = vkms_gem_vmap(gem_obj);
if (ret)
DRM_ERROR("vmap failed: %d\n", ret);
return drm_gem_fb_prepare_fb(plane, state);
}
static void vkms_cleanup_fb(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct drm_gem_object *gem_obj;
if (!old_state->fb)
return;
gem_obj = drm_gem_fb_get_obj(old_state->fb, 0);
vkms_gem_vunmap(gem_obj);
}
static const struct drm_plane_helper_funcs vkms_primary_helper_funcs = {
.atomic_update = vkms_primary_plane_update,
.atomic_check = vkms_plane_atomic_check,
.prepare_fb = vkms_prepare_fb,
.cleanup_fb = vkms_cleanup_fb,
};
struct drm_plane *vkms_plane_init(struct vkms_device *vkmsdev)
{
struct drm_device *dev = &vkmsdev->drm;
struct drm_plane *plane;
const u32 *formats;
int ret, nformats;
plane = kzalloc(sizeof(*plane), GFP_KERNEL);
if (!plane)
return ERR_PTR(-ENOMEM);
formats = vkms_formats;
nformats = ARRAY_SIZE(vkms_formats);
ret = drm_universal_plane_init(dev, plane, 0,
&vkms_plane_funcs,
formats, nformats,
NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret) {
kfree(plane);
return ERR_PTR(ret);
}
drm_plane_helper_add(plane, &vkms_primary_helper_funcs);
return plane;
}
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