X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fexynos%2Fexynos_drm_fb.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fexynos%2Fexynos_drm_fb.c;h=142eb4e3f59ea5501805cc56bed7cbef4106ae7b;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git diff --git a/kernel/drivers/gpu/drm/exynos/exynos_drm_fb.c b/kernel/drivers/gpu/drm/exynos/exynos_drm_fb.c new file mode 100644 index 000000000..142eb4e3f --- /dev/null +++ b/kernel/drivers/gpu/drm/exynos/exynos_drm_fb.c @@ -0,0 +1,287 @@ +/* exynos_drm_fb.c + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Authors: + * Inki Dae + * Joonyoung Shim + * Seung-Woo Kim + * + * 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 +#include +#include +#include +#include + +#include "exynos_drm_drv.h" +#include "exynos_drm_fb.h" +#include "exynos_drm_fbdev.h" +#include "exynos_drm_gem.h" +#include "exynos_drm_iommu.h" +#include "exynos_drm_crtc.h" + +#define to_exynos_fb(x) container_of(x, struct exynos_drm_fb, fb) + +/* + * exynos specific framebuffer structure. + * + * @fb: drm framebuffer obejct. + * @buf_cnt: a buffer count to drm framebuffer. + * @exynos_gem_obj: array of exynos specific gem object containing a gem object. + */ +struct exynos_drm_fb { + struct drm_framebuffer fb; + unsigned int buf_cnt; + struct exynos_drm_gem_obj *exynos_gem_obj[MAX_FB_BUFFER]; +}; + +static int check_fb_gem_memory_type(struct drm_device *drm_dev, + struct exynos_drm_gem_obj *exynos_gem_obj) +{ + unsigned int flags; + + /* + * if exynos drm driver supports iommu then framebuffer can use + * all the buffer types. + */ + if (is_drm_iommu_supported(drm_dev)) + return 0; + + flags = exynos_gem_obj->flags; + + /* + * without iommu support, not support physically non-continuous memory + * for framebuffer. + */ + if (IS_NONCONTIG_BUFFER(flags)) { + DRM_ERROR("cannot use this gem memory type for fb.\n"); + return -EINVAL; + } + + return 0; +} + +static void exynos_drm_fb_destroy(struct drm_framebuffer *fb) +{ + struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); + unsigned int i; + + /* make sure that overlay data are updated before relesing fb. */ + exynos_drm_crtc_complete_scanout(fb); + + drm_framebuffer_cleanup(fb); + + for (i = 0; i < ARRAY_SIZE(exynos_fb->exynos_gem_obj); i++) { + struct drm_gem_object *obj; + + if (exynos_fb->exynos_gem_obj[i] == NULL) + continue; + + obj = &exynos_fb->exynos_gem_obj[i]->base; + drm_gem_object_unreference_unlocked(obj); + } + + kfree(exynos_fb); + exynos_fb = NULL; +} + +static int exynos_drm_fb_create_handle(struct drm_framebuffer *fb, + struct drm_file *file_priv, + unsigned int *handle) +{ + struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); + + /* This fb should have only one gem object. */ + if (WARN_ON(exynos_fb->buf_cnt != 1)) + return -EINVAL; + + return drm_gem_handle_create(file_priv, + &exynos_fb->exynos_gem_obj[0]->base, handle); +} + +static int exynos_drm_fb_dirty(struct drm_framebuffer *fb, + struct drm_file *file_priv, unsigned flags, + unsigned color, struct drm_clip_rect *clips, + unsigned num_clips) +{ + /* TODO */ + + return 0; +} + +static struct drm_framebuffer_funcs exynos_drm_fb_funcs = { + .destroy = exynos_drm_fb_destroy, + .create_handle = exynos_drm_fb_create_handle, + .dirty = exynos_drm_fb_dirty, +}; + +void exynos_drm_fb_set_buf_cnt(struct drm_framebuffer *fb, + unsigned int cnt) +{ + struct exynos_drm_fb *exynos_fb; + + exynos_fb = to_exynos_fb(fb); + + exynos_fb->buf_cnt = cnt; +} + +unsigned int exynos_drm_fb_get_buf_cnt(struct drm_framebuffer *fb) +{ + struct exynos_drm_fb *exynos_fb; + + exynos_fb = to_exynos_fb(fb); + + return exynos_fb->buf_cnt; +} + +struct drm_framebuffer * +exynos_drm_framebuffer_init(struct drm_device *dev, + struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_gem_object *obj) +{ + struct exynos_drm_fb *exynos_fb; + struct exynos_drm_gem_obj *exynos_gem_obj; + int ret; + + exynos_gem_obj = to_exynos_gem_obj(obj); + + ret = check_fb_gem_memory_type(dev, exynos_gem_obj); + if (ret < 0) + return ERR_PTR(ret); + + exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); + if (!exynos_fb) + return ERR_PTR(-ENOMEM); + + drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); + exynos_fb->exynos_gem_obj[0] = exynos_gem_obj; + + ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); + if (ret) { + kfree(exynos_fb); + DRM_ERROR("failed to initialize framebuffer\n"); + return ERR_PTR(ret); + } + + return &exynos_fb->fb; +} + +static struct drm_framebuffer * +exynos_user_fb_create(struct drm_device *dev, struct drm_file *file_priv, + struct drm_mode_fb_cmd2 *mode_cmd) +{ + struct drm_gem_object *obj; + struct exynos_drm_gem_obj *exynos_gem_obj; + struct exynos_drm_fb *exynos_fb; + int i, ret; + + exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL); + if (!exynos_fb) + return ERR_PTR(-ENOMEM); + + obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]); + if (!obj) { + DRM_ERROR("failed to lookup gem object\n"); + ret = -ENOENT; + goto err_free; + } + + drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd); + exynos_fb->exynos_gem_obj[0] = to_exynos_gem_obj(obj); + exynos_fb->buf_cnt = drm_format_num_planes(mode_cmd->pixel_format); + + DRM_DEBUG_KMS("buf_cnt = %d\n", exynos_fb->buf_cnt); + + for (i = 1; i < exynos_fb->buf_cnt; i++) { + obj = drm_gem_object_lookup(dev, file_priv, + mode_cmd->handles[i]); + if (!obj) { + DRM_ERROR("failed to lookup gem object\n"); + ret = -ENOENT; + exynos_fb->buf_cnt = i; + goto err_unreference; + } + + exynos_gem_obj = to_exynos_gem_obj(obj); + exynos_fb->exynos_gem_obj[i] = exynos_gem_obj; + + ret = check_fb_gem_memory_type(dev, exynos_gem_obj); + if (ret < 0) + goto err_unreference; + } + + ret = drm_framebuffer_init(dev, &exynos_fb->fb, &exynos_drm_fb_funcs); + if (ret) { + DRM_ERROR("failed to init framebuffer.\n"); + goto err_unreference; + } + + return &exynos_fb->fb; + +err_unreference: + for (i = 0; i < exynos_fb->buf_cnt; i++) { + struct drm_gem_object *obj; + + obj = &exynos_fb->exynos_gem_obj[i]->base; + if (obj) + drm_gem_object_unreference_unlocked(obj); + } +err_free: + kfree(exynos_fb); + return ERR_PTR(ret); +} + +struct exynos_drm_gem_buf *exynos_drm_fb_buffer(struct drm_framebuffer *fb, + int index) +{ + struct exynos_drm_fb *exynos_fb = to_exynos_fb(fb); + struct exynos_drm_gem_buf *buffer; + + if (index >= MAX_FB_BUFFER) + return NULL; + + buffer = exynos_fb->exynos_gem_obj[index]->buffer; + if (!buffer) + return NULL; + + DRM_DEBUG_KMS("dma_addr = 0x%lx\n", (unsigned long)buffer->dma_addr); + + return buffer; +} + +static void exynos_drm_output_poll_changed(struct drm_device *dev) +{ + struct exynos_drm_private *private = dev->dev_private; + struct drm_fb_helper *fb_helper = private->fb_helper; + + if (fb_helper) + drm_fb_helper_hotplug_event(fb_helper); + else + exynos_drm_fbdev_init(dev); +} + +static const struct drm_mode_config_funcs exynos_drm_mode_config_funcs = { + .fb_create = exynos_user_fb_create, + .output_poll_changed = exynos_drm_output_poll_changed, +}; + +void exynos_drm_mode_config_init(struct drm_device *dev) +{ + dev->mode_config.min_width = 0; + dev->mode_config.min_height = 0; + + /* + * set max width and height as default value(4096x4096). + * this value would be used to check framebuffer size limitation + * at drm_mode_addfb(). + */ + dev->mode_config.max_width = 4096; + dev->mode_config.max_height = 4096; + + dev->mode_config.funcs = &exynos_drm_mode_config_funcs; +}