drivers/gpu/drm/vkms/vkms_plane.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/vkms/vkms_plane.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/vkms/vkms_plane.c
Extension
.c
Size
6755 bytes
Lines
254
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0+

#include "vkms_config.h"
#include <linux/iosys-map.h>

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_blend.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_print.h>

#include "vkms_drv.h"
#include "vkms_formats.h"

static const u32 vkms_formats[] = {
	DRM_FORMAT_ARGB8888,
	DRM_FORMAT_ABGR8888,
	DRM_FORMAT_BGRA8888,
	DRM_FORMAT_RGBA8888,
	DRM_FORMAT_XRGB8888,
	DRM_FORMAT_XBGR8888,
	DRM_FORMAT_RGB888,
	DRM_FORMAT_BGR888,
	DRM_FORMAT_XRGB16161616,
	DRM_FORMAT_XBGR16161616,
	DRM_FORMAT_ARGB16161616,
	DRM_FORMAT_ABGR16161616,
	DRM_FORMAT_RGB565,
	DRM_FORMAT_BGR565,
	DRM_FORMAT_NV12,
	DRM_FORMAT_NV16,
	DRM_FORMAT_NV24,
	DRM_FORMAT_NV21,
	DRM_FORMAT_NV61,
	DRM_FORMAT_NV42,
	DRM_FORMAT_YUV420,
	DRM_FORMAT_YUV422,
	DRM_FORMAT_YUV444,
	DRM_FORMAT_YVU420,
	DRM_FORMAT_YVU422,
	DRM_FORMAT_YVU444,
	DRM_FORMAT_P010,
	DRM_FORMAT_P012,
	DRM_FORMAT_P016,
	DRM_FORMAT_R1,
	DRM_FORMAT_R2,
	DRM_FORMAT_R4,
	DRM_FORMAT_R8,
};

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_obj(*vkms_state);
	if (!vkms_state)
		return NULL;

	frame_info = kzalloc_obj(*frame_info);
	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);
	}

Annotation

Implementation Notes