path: root/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c

// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
 *
 * Copyright (c) 2011-2024 Broadcom. All Rights Reserved. The term
 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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#include "vmwgfx_bo.h"
#include "vmwgfx_kms.h"
#include "vmwgfx_vkms.h"

#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_damage_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_vblank.h>

#define vmw_crtc_to_sou(x) \
	container_of(x, struct vmw_screen_object_unit, base.crtc)
#define vmw_encoder_to_sou(x) \
	container_of(x, struct vmw_screen_object_unit, base.encoder)
#define vmw_connector_to_sou(x) \
	container_of(x, struct vmw_screen_object_unit, base.connector)

/**
 * struct vmw_kms_sou_surface_dirty - Closure structure for
 * blit surface to screen command.
 * @base: The base type we derive from. Used by vmw_kms_helper_dirty().
 * @left: Left side of bounding box.
 * @right: Right side of bounding box.
 * @top: Top side of bounding box.
 * @bottom: Bottom side of bounding box.
 * @dst_x: Difference between source clip rects and framebuffer coordinates.
 * @dst_y: Difference between source clip rects and framebuffer coordinates.
 * @sid: Surface id of surface to copy from.
 */
struct vmw_kms_sou_surface_dirty {
	struct vmw_kms_dirty base;
	s32 left, right, top, bottom;
	s32 dst_x, dst_y;
	u32 sid;
};

/*
 * SVGA commands that are used by this code. Please see the device headers
 * for explanation.
 */
struct vmw_kms_sou_readback_blit {
	uint32 header;
	SVGAFifoCmdBlitScreenToGMRFB body;
};

struct vmw_kms_sou_bo_blit {
	uint32 header;
	SVGAFifoCmdBlitGMRFBToScreen body;
};

struct vmw_kms_sou_dirty_cmd {
	SVGA3dCmdHeader header;
	SVGA3dCmdBlitSurfaceToScreen body;
};

struct vmw_kms_sou_define_gmrfb {
	uint32_t header;
	SVGAFifoCmdDefineGMRFB body;
};

/*
 * Display unit using screen objects.
 */
struct vmw_screen_object_unit {
	struct vmw_display_unit base;

	struct vmw_bo *buffer; /**< Backing store buffer */

	bool defined;
};

static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
{
	vmw_du_cleanup(&sou->base);
	kfree(sou);
}


/*
 * Screen Object Display Unit CRTC functions
 */

static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
{
	vmw_sou_destroy(vmw_crtc_to_sou(crtc));
}

/*
 * Send the fifo command to create a screen.
 */
static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
			       struct vmw_screen_object_unit *sou,
			       int x, int y,
			       struct drm_display_mode *mode)
{
	size_t fifo_size;

	struct {
		struct