![Daniel Vetter](/assets/img/avatar_default.png)
For user framebuffers it's easier to just inline the exynos_drm_framebuffer_init helper instead of trying to adjust it - most of the things that helper sets up need to be overwritten anyway again due to the multiple backing storage objects support exynos has, but does not use for the fbdev. Changelog v2: - fix NULL point issue to first gem object of exynos drm framebuffer. Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Inki Dae <inki.dae@samsung.com>
346 lines
8.7 KiB
C
346 lines
8.7 KiB
C
/* exynos_drm_fb.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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* Joonyoung Shim <jy0922.shim@samsung.com>
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* Seung-Woo Kim <sw0312.kim@samsung.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <uapi/drm/exynos_drm.h>
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#include "exynos_drm_drv.h"
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#include "exynos_drm_fb.h"
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#include "exynos_drm_gem.h"
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#include "exynos_drm_iommu.h"
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#include "exynos_drm_encoder.h"
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#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb)
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/*
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* exynos specific framebuffer structure.
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*
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* @fb: drm framebuffer obejct.
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* @buf_cnt: a buffer count to drm framebuffer.
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* @exynos_gem_obj: array of exynos specific gem object containing a gem object.
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*/
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struct exynos_drm_fb {
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struct drm_framebuffer fb;
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unsigned int buf_cnt;
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struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER];
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};
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static int check_fb_gem_memory_type(struct drm_device *drm_dev,
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struct exynos_drm_gem_obj *exynos_gem_obj)
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{
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unsigned int flags;
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/*
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* if exynos drm driver supports iommu then framebuffer can use
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* all the buffer types.
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*/
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if (is_drm_iommu_supported(drm_dev))
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return 0;
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flags = exynos_gem_obj->flags;
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/*
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* without iommu support, not support physically non-continuous memory
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* for framebuffer.
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*/
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if (IS_NONCONTIG_BUFFER(flags)) {
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DRM_ERROR("cannot use this gem memory type for fb.\n");
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return -EINVAL;
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}
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return 0;
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}
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static void exynos_drm_fb_destroy(struct drm_framebuffer *fb)
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{
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struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
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unsigned int i;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/* make sure that overlay data are updated before relesing fb. */
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exynos_drm_encoder_complete_scanout(fb);
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drm_framebuffer_cleanup(fb);
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for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) {
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struct drm_gem_object *obj;
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if (exynos_fb->exynos_gem_obj[i] == NULL)
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continue;
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obj = &exynos_fb->exynos_gem_obj[i]->base;
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drm_gem_object_unreference_unlocked(obj);
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}
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kfree(exynos_fb);
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exynos_fb = NULL;
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}
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static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb,
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struct drm_file *file_priv,
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unsigned int *handle)
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{
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struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
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DRM_DEBUG_KMS("%s\n", __FILE__);
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return drm_gem_handle_create(file_priv,
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&exynos_fb->exynos_gem_obj[0]->base, handle);
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}
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static int exynos_drm_fb_dirty(struct drm_framebuffer *fb,
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struct drm_file *file_priv, unsigned flags,
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unsigned color, struct drm_clip_rect *clips,
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unsigned num_clips)
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{
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DRM_DEBUG_KMS("%s\n", __FILE__);
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/* TODO */
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return 0;
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}
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static struct drm_framebuffer_funcs exynos_drm_fb_funcs = {
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.destroy = exynos_drm_fb_destroy,
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.create_handle = exynos_drm_fb_create_handle,
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.dirty = exynos_drm_fb_dirty,
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};
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void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb,
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unsigned int cnt)
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{
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struct exynos_drm_fb *exynos_fb;
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exynos_fb = to_exynos_fb(fb);
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exynos_fb->buf_cnt = cnt;
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}
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unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb)
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{
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struct exynos_drm_fb *exynos_fb;
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exynos_fb = to_exynos_fb(fb);
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return exynos_fb->buf_cnt;
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}
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struct drm_framebuffer *
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exynos_drm_framebuffer_init(struct drm_device *dev,
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struct drm_mode_fb_cmd2 *mode_cmd,
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struct drm_gem_object *obj)
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{
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struct exynos_drm_fb *exynos_fb;
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struct exynos_drm_gem_obj *exynos_gem_obj;
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int ret;
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exynos_gem_obj = to_exynos_gem_obj(obj);
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ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
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if (ret < 0) {
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DRM_ERROR("cannot use this gem memory type for fb.\n");
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return ERR_PTR(-EINVAL);
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}
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exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
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if (!exynos_fb) {
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DRM_ERROR("failed to allocate exynos drm framebuffer\n");
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return ERR_PTR(-ENOMEM);
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}
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drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
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exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
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ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
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if (ret) {
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DRM_ERROR("failed to initialize framebuffer\n");
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return ERR_PTR(ret);
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}
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return &exynos_fb->fb;
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}
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static u32 exynos_drm_format_num_buffers(struct drm_mode_fb_cmd2 *mode_cmd)
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{
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unsigned int cnt = 0;
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if (mode_cmd->pixel_format != DRM_FORMAT_NV12)
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return drm_format_num_planes(mode_cmd->pixel_format);
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while (cnt != MAX_FB_BUFFER) {
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if (!mode_cmd->handles[cnt])
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break;
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cnt++;
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}
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/*
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* check if NV12 or NV12M.
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*
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* NV12
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* handles[0] = base1, offsets[0] = 0
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* handles[1] = base1, offsets[1] = Y_size
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*
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* NV12M
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* handles[0] = base1, offsets[0] = 0
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* handles[1] = base2, offsets[1] = 0
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*/
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if (cnt == 2) {
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/*
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* in case of NV12 format, offsets[1] is not 0 and
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* handles[0] is same as handles[1].
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*/
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if (mode_cmd->offsets[1] &&
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mode_cmd->handles[0] == mode_cmd->handles[1])
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cnt = 1;
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}
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return cnt;
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}
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static struct drm_framebuffer *
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exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
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struct drm_mode_fb_cmd2 *mode_cmd)
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{
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struct drm_gem_object *obj;
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struct exynos_drm_fb *exynos_fb;
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int i, ret;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
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if (!obj) {
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DRM_ERROR("failed to lookup gem object\n");
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return ERR_PTR(-ENOENT);
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}
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exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
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if (!exynos_fb) {
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DRM_ERROR("failed to allocate exynos drm framebuffer\n");
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return ERR_PTR(-ENOMEM);
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}
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drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
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exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj);
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exynos_fb->buf_cnt = exynos_drm_format_num_buffers(mode_cmd);
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DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt);
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for (i = 1; i < exynos_fb->buf_cnt; i++) {
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struct exynos_drm_gem_obj *exynos_gem_obj;
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int ret;
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obj = drm_gem_object_lookup(dev, file_priv,
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mode_cmd->handles[i]);
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if (!obj) {
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DRM_ERROR("failed to lookup gem object\n");
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kfree(exynos_fb);
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return ERR_PTR(-ENOENT);
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}
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exynos_gem_obj = to_exynos_gem_obj(obj);
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ret = check_fb_gem_memory_type(dev, exynos_gem_obj);
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if (ret < 0) {
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DRM_ERROR("cannot use this gem memory type for fb.\n");
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kfree(exynos_fb);
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return ERR_PTR(ret);
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}
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exynos_fb->exynos_gem_obj[i] = to_exynos_gem_obj(obj);
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}
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ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs);
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if (ret) {
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for (i = 0; i < exynos_fb->buf_cnt; i++) {
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struct exynos_drm_gem_obj *gem_obj;
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gem_obj = exynos_fb->exynos_gem_obj[i];
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drm_gem_object_unreference_unlocked(&gem_obj->base);
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}
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kfree(exynos_fb);
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return ERR_PTR(ret);
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}
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return &exynos_fb->fb;
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}
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struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb,
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int index)
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{
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struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb);
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struct exynos_drm_gem_buf *buffer;
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DRM_DEBUG_KMS("%s\n", __FILE__);
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if (index >= MAX_FB_BUFFER)
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return NULL;
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buffer = exynos_fb->exynos_gem_obj[index]->buffer;
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if (!buffer)
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return NULL;
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DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr);
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return buffer;
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}
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static void exynos_drm_output_poll_changed(struct drm_device *dev)
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{
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struct exynos_drm_private *private = dev->dev_private;
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struct drm_fb_helper *fb_helper = private->fb_helper;
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if (fb_helper)
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drm_fb_helper_hotplug_event(fb_helper);
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}
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static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = {
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.fb_create = exynos_user_fb_create,
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.output_poll_changed = exynos_drm_output_poll_changed,
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};
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void exynos_drm_mode_config_init(struct drm_device *dev)
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{
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dev->mode_config.min_width = 0;
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dev->mode_config.min_height = 0;
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/*
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* set max width and height as default value(4096x4096).
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* this value would be used to check framebuffer size limitation
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* at drm_mode_addfb().
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*/
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dev->mode_config.max_width = 4096;
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dev->mode_config.max_height = 4096;
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dev->mode_config.funcs = &exynos_drm_mode_config_funcs;
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}
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