178 lines
4 KiB
C
178 lines
4 KiB
C
/*
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* Copyright (C) 2012 Russell King
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* Written from the i915 driver.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <drm/drm_fb_helper.h>
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#include "armada_crtc.h"
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#include "armada_drm.h"
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#include "armada_fb.h"
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#include "armada_gem.h"
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static /*const*/ struct fb_ops armada_fb_ops = {
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.owner = THIS_MODULE,
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DRM_FB_HELPER_DEFAULT_OPS,
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.fb_fillrect = drm_fb_helper_cfb_fillrect,
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.fb_copyarea = drm_fb_helper_cfb_copyarea,
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.fb_imageblit = drm_fb_helper_cfb_imageblit,
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};
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static int armada_fbdev_create(struct drm_fb_helper *fbh,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct drm_device *dev = fbh->dev;
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struct drm_mode_fb_cmd2 mode;
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struct armada_framebuffer *dfb;
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struct armada_gem_object *obj;
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struct fb_info *info;
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int size, ret;
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void *ptr;
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memset(&mode, 0, sizeof(mode));
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mode.width = sizes->surface_width;
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mode.height = sizes->surface_height;
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mode.pitches[0] = armada_pitch(mode.width, sizes->surface_bpp);
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mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode.pitches[0] * mode.height;
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obj = armada_gem_alloc_private_object(dev, size);
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if (!obj) {
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DRM_ERROR("failed to allocate fb memory\n");
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return -ENOMEM;
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}
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ret = armada_gem_linear_back(dev, obj);
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if (ret) {
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drm_gem_object_put_unlocked(&obj->obj);
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return ret;
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}
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ptr = armada_gem_map_object(dev, obj);
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if (!ptr) {
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drm_gem_object_put_unlocked(&obj->obj);
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return -ENOMEM;
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}
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dfb = armada_framebuffer_create(dev, &mode, obj);
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/*
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* A reference is now held by the framebuffer object if
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* successful, otherwise this drops the ref for the error path.
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*/
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drm_gem_object_put_unlocked(&obj->obj);
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if (IS_ERR(dfb))
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return PTR_ERR(dfb);
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info = drm_fb_helper_alloc_fbi(fbh);
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if (IS_ERR(info)) {
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ret = PTR_ERR(info);
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goto err_fballoc;
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}
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strlcpy(info->fix.id, "armada-drmfb", sizeof(info->fix.id));
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info->par = fbh;
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info->fbops = &armada_fb_ops;
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info->fix.smem_start = obj->phys_addr;
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info->fix.smem_len = obj->obj.size;
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info->screen_size = obj->obj.size;
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info->screen_base = ptr;
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fbh->fb = &dfb->fb;
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drm_fb_helper_fill_fix(info, dfb->fb.pitches[0],
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dfb->fb.format->depth);
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drm_fb_helper_fill_var(info, fbh, sizes->fb_width, sizes->fb_height);
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DRM_DEBUG_KMS("allocated %dx%d %dbpp fb: 0x%08llx\n",
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dfb->fb.width, dfb->fb.height, dfb->fb.format->cpp[0] * 8,
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(unsigned long long)obj->phys_addr);
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return 0;
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err_fballoc:
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dfb->fb.funcs->destroy(&dfb->fb);
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return ret;
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}
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static int armada_fb_probe(struct drm_fb_helper *fbh,
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struct drm_fb_helper_surface_size *sizes)
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{
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int ret = 0;
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if (!fbh->fb) {
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ret = armada_fbdev_create(fbh, sizes);
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if (ret == 0)
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ret = 1;
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}
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return ret;
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}
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static const struct drm_fb_helper_funcs armada_fb_helper_funcs = {
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.fb_probe = armada_fb_probe,
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};
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int armada_fbdev_init(struct drm_device *dev)
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{
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struct armada_private *priv = dev->dev_private;
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struct drm_fb_helper *fbh;
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int ret;
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fbh = devm_kzalloc(dev->dev, sizeof(*fbh), GFP_KERNEL);
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if (!fbh)
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return -ENOMEM;
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priv->fbdev = fbh;
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drm_fb_helper_prepare(dev, fbh, &armada_fb_helper_funcs);
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ret = drm_fb_helper_init(dev, fbh, 1);
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if (ret) {
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DRM_ERROR("failed to initialize drm fb helper\n");
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goto err_fb_helper;
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}
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ret = drm_fb_helper_single_add_all_connectors(fbh);
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if (ret) {
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DRM_ERROR("failed to add fb connectors\n");
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goto err_fb_setup;
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}
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ret = drm_fb_helper_initial_config(fbh, 32);
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if (ret) {
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DRM_ERROR("failed to set initial config\n");
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goto err_fb_setup;
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}
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return 0;
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err_fb_setup:
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drm_fb_helper_fini(fbh);
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err_fb_helper:
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priv->fbdev = NULL;
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return ret;
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}
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void armada_fbdev_fini(struct drm_device *dev)
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{
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struct armada_private *priv = dev->dev_private;
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struct drm_fb_helper *fbh = priv->fbdev;
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if (fbh) {
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drm_fb_helper_unregister_fbi(fbh);
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drm_fb_helper_fini(fbh);
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if (fbh->fb)
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fbh->fb->funcs->destroy(fbh->fb);
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priv->fbdev = NULL;
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}
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}
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