1802d0beec
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2015 MediaTek Inc.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_modeset_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <linux/dma-buf.h>
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#include <linux/reservation.h>
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#include "mtk_drm_drv.h"
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#include "mtk_drm_fb.h"
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#include "mtk_drm_gem.h"
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static const struct drm_framebuffer_funcs mtk_drm_fb_funcs = {
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.create_handle = drm_gem_fb_create_handle,
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.destroy = drm_gem_fb_destroy,
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};
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static struct drm_framebuffer *mtk_drm_framebuffer_init(struct drm_device *dev,
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const struct drm_mode_fb_cmd2 *mode,
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struct drm_gem_object *obj)
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{
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struct drm_framebuffer *fb;
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int ret;
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if (drm_format_num_planes(mode->pixel_format) != 1)
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return ERR_PTR(-EINVAL);
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fb = kzalloc(sizeof(*fb), GFP_KERNEL);
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if (!fb)
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return ERR_PTR(-ENOMEM);
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drm_helper_mode_fill_fb_struct(dev, fb, mode);
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fb->obj[0] = obj;
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ret = drm_framebuffer_init(dev, fb, &mtk_drm_fb_funcs);
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if (ret) {
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DRM_ERROR("failed to initialize framebuffer\n");
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kfree(fb);
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return ERR_PTR(ret);
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}
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return fb;
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}
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/*
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* Wait for any exclusive fence in fb's gem object's reservation object.
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*
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* Returns -ERESTARTSYS if interrupted, else 0.
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*/
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int mtk_fb_wait(struct drm_framebuffer *fb)
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{
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struct drm_gem_object *gem;
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struct reservation_object *resv;
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long ret;
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if (!fb)
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return 0;
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gem = fb->obj[0];
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if (!gem || !gem->dma_buf || !gem->dma_buf->resv)
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return 0;
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resv = gem->dma_buf->resv;
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ret = reservation_object_wait_timeout_rcu(resv, false, true,
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MAX_SCHEDULE_TIMEOUT);
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/* MAX_SCHEDULE_TIMEOUT on success, -ERESTARTSYS if interrupted */
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if (WARN_ON(ret < 0))
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return ret;
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return 0;
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}
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struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
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struct drm_file *file,
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const struct drm_mode_fb_cmd2 *cmd)
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{
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struct drm_framebuffer *fb;
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struct drm_gem_object *gem;
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unsigned int width = cmd->width;
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unsigned int height = cmd->height;
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unsigned int size, bpp;
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int ret;
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if (drm_format_num_planes(cmd->pixel_format) != 1)
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return ERR_PTR(-EINVAL);
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gem = drm_gem_object_lookup(file, cmd->handles[0]);
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if (!gem)
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return ERR_PTR(-ENOENT);
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bpp = drm_format_plane_cpp(cmd->pixel_format, 0);
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size = (height - 1) * cmd->pitches[0] + width * bpp;
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size += cmd->offsets[0];
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if (gem->size < size) {
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ret = -EINVAL;
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goto unreference;
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}
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fb = mtk_drm_framebuffer_init(dev, cmd, gem);
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if (IS_ERR(fb)) {
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ret = PTR_ERR(fb);
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goto unreference;
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}
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return fb;
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unreference:
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drm_gem_object_put_unlocked(gem);
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return ERR_PTR(ret);
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}
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