+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* Hisilicon Hibmc SoC drm driver
- *
- * Based on the bochs drm driver.
- *
- * Copyright (c) 2016 Huawei Limited.
- *
- * Author:
- * Rongrong Zou <zourongrong@huawei.com>
- * Rongrong Zou <zourongrong@gmail.com>
- * Jianhua Li <lijianhua@huawei.com>
- */
-
-#include <drm/drm_crtc.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_fourcc.h>
-#include <drm/drm_gem_vram_helper.h>
-#include <drm/drm_probe_helper.h>
-
-#include "hibmc_drm_drv.h"
-
-static int hibmcfb_create_object(
- struct hibmc_drm_private *priv,
- const struct drm_mode_fb_cmd2 *mode_cmd,
- struct drm_gem_object **gobj_p)
-{
- struct drm_gem_object *gobj;
- struct drm_device *dev = priv->dev;
- u32 size;
- int ret = 0;
-
- size = mode_cmd->pitches[0] * mode_cmd->height;
- ret = hibmc_gem_create(dev, size, true, &gobj);
- if (ret)
- return ret;
-
- *gobj_p = gobj;
- return ret;
-}
-
-static const struct fb_ops hibmc_drm_fb_ops = {
- .owner = THIS_MODULE,
- .fb_check_var = drm_fb_helper_check_var,
- .fb_set_par = drm_fb_helper_set_par,
- .fb_fillrect = drm_fb_helper_sys_fillrect,
- .fb_copyarea = drm_fb_helper_sys_copyarea,
- .fb_imageblit = drm_fb_helper_sys_imageblit,
- .fb_pan_display = drm_fb_helper_pan_display,
- .fb_blank = drm_fb_helper_blank,
- .fb_setcmap = drm_fb_helper_setcmap,
-};
-
-static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
- struct drm_fb_helper_surface_size *sizes)
-{
- struct hibmc_fbdev *hi_fbdev =
- container_of(helper, struct hibmc_fbdev, helper);
- struct hibmc_drm_private *priv = helper->dev->dev_private;
- struct fb_info *info;
- struct drm_mode_fb_cmd2 mode_cmd;
- struct drm_gem_object *gobj = NULL;
- int ret = 0;
- size_t size;
- unsigned int bytes_per_pixel;
- struct drm_gem_vram_object *gbo = NULL;
- void *base;
-
- DRM_DEBUG_DRIVER("surface width(%d), height(%d) and bpp(%d)\n",
- sizes->surface_width, sizes->surface_height,
- sizes->surface_bpp);
-
- bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
-
- mode_cmd.width = sizes->surface_width;
- mode_cmd.height = sizes->surface_height;
- mode_cmd.pitches[0] = mode_cmd.width * bytes_per_pixel;
- mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
- sizes->surface_depth);
-
- size = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height);
-
- ret = hibmcfb_create_object(priv, &mode_cmd, &gobj);
- if (ret) {
- DRM_ERROR("failed to create fbcon backing object: %d\n", ret);
- return -ENOMEM;
- }
-
- gbo = drm_gem_vram_of_gem(gobj);
-
- ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
- if (ret) {
- DRM_ERROR("failed to pin fbcon: %d\n", ret);
- goto out_unref_gem;
- }
-
- base = drm_gem_vram_kmap(gbo, true, NULL);
- if (IS_ERR(base)) {
- ret = PTR_ERR(base);
- DRM_ERROR("failed to kmap fbcon: %d\n", ret);
- goto out_unpin_bo;
- }
-
- info = drm_fb_helper_alloc_fbi(helper);
- if (IS_ERR(info)) {
- ret = PTR_ERR(info);
- DRM_ERROR("failed to allocate fbi: %d\n", ret);
- goto out_release_fbi;
- }
-
- hi_fbdev->fb = hibmc_framebuffer_init(priv->dev, &mode_cmd, gobj);
- if (IS_ERR(hi_fbdev->fb)) {
- ret = PTR_ERR(hi_fbdev->fb);
- hi_fbdev->fb = NULL;
- DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
- goto out_release_fbi;
- }
-
- priv->fbdev->size = size;
- hi_fbdev->helper.fb = &hi_fbdev->fb->fb;
-
- info->fbops = &hibmc_drm_fb_ops;
-
- drm_fb_helper_fill_info(info, &priv->fbdev->helper, sizes);
-
- info->screen_base = base;
- info->screen_size = size;
-
- info->fix.smem_start = gbo->bo.mem.bus.offset + gbo->bo.mem.bus.base;
- info->fix.smem_len = size;
- return 0;
-
-out_release_fbi:
- drm_gem_vram_kunmap(gbo);
-out_unpin_bo:
- drm_gem_vram_unpin(gbo);
-out_unref_gem:
- drm_gem_object_put_unlocked(gobj);
-
- return ret;
-}
-
-static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
-{
- struct hibmc_framebuffer *gfb = fbdev->fb;
- struct drm_fb_helper *fbh = &fbdev->helper;
-
- drm_fb_helper_unregister_fbi(fbh);
-
- drm_fb_helper_fini(fbh);
-
- if (gfb)
- drm_framebuffer_put(&gfb->fb);
-}
-
-static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
- .fb_probe = hibmc_drm_fb_create,
-};
-
-int hibmc_fbdev_init(struct hibmc_drm_private *priv)
-{
- int ret;
- struct fb_var_screeninfo *var;
- struct fb_fix_screeninfo *fix;
- struct hibmc_fbdev *hifbdev;
-
- hifbdev = devm_kzalloc(priv->dev->dev, sizeof(*hifbdev), GFP_KERNEL);
- if (!hifbdev) {
- DRM_ERROR("failed to allocate hibmc_fbdev\n");
- return -ENOMEM;
- }
-
- priv->fbdev = hifbdev;
- drm_fb_helper_prepare(priv->dev, &hifbdev->helper,
- &hibmc_fbdev_helper_funcs);
-
- /* Now just one crtc and one channel */
- ret = drm_fb_helper_init(priv->dev, &hifbdev->helper, 1);
- if (ret) {
- DRM_ERROR("failed to initialize fb helper: %d\n", ret);
- return ret;
- }
-
- ret = drm_fb_helper_single_add_all_connectors(&hifbdev->helper);
- if (ret) {
- DRM_ERROR("failed to add all connectors: %d\n", ret);
- goto fini;
- }
-
- ret = drm_fb_helper_initial_config(&hifbdev->helper, 16);
- if (ret) {
- DRM_ERROR("failed to setup initial conn config: %d\n", ret);
- goto fini;
- }
-
- var = &hifbdev->helper.fbdev->var;
- fix = &hifbdev->helper.fbdev->fix;
-
- DRM_DEBUG_DRIVER("Member of info->var is :\n"
- "xres=%d\n"
- "yres=%d\n"
- "xres_virtual=%d\n"
- "yres_virtual=%d\n"
- "xoffset=%d\n"
- "yoffset=%d\n"
- "bits_per_pixel=%d\n"
- "...\n", var->xres, var->yres, var->xres_virtual,
- var->yres_virtual, var->xoffset, var->yoffset,
- var->bits_per_pixel);
- DRM_DEBUG_DRIVER("Member of info->fix is :\n"
- "smem_start=%lx\n"
- "smem_len=%d\n"
- "type=%d\n"
- "type_aux=%d\n"
- "visual=%d\n"
- "xpanstep=%d\n"
- "ypanstep=%d\n"
- "ywrapstep=%d\n"
- "line_length=%d\n"
- "accel=%d\n"
- "capabilities=%d\n"
- "...\n", fix->smem_start, fix->smem_len, fix->type,
- fix->type_aux, fix->visual, fix->xpanstep,
- fix->ypanstep, fix->ywrapstep, fix->line_length,
- fix->accel, fix->capabilities);
-
- return 0;
-
-fini:
- drm_fb_helper_fini(&hifbdev->helper);
- return ret;
-}
-
-void hibmc_fbdev_fini(struct hibmc_drm_private *priv)
-{
- if (!priv->fbdev)
- return;
-
- hibmc_fbdev_destroy(priv->fbdev);
- priv->fbdev = NULL;
-}
projects / openwrt / staging / blogic.git / commitdiff