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72282a88d4
drm_dev_alloc() never returns NULL, it only returns error pointers on
error.
Fixes: 0a886f5952 ("drm: zte: add initial vou drm driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161115095301.GC15424@mwanda
267 lines
6.5 KiB
C
267 lines
6.5 KiB
C
/*
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* Copyright 2016 Linaro Ltd.
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* Copyright 2016 ZTE Corporation.
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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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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/of_graph.h>
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#include <linux/of_platform.h>
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#include <linux/spinlock.h>
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#include <drm/drm_atomic_helper.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_cma_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_of.h>
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#include <drm/drmP.h>
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#include "zx_drm_drv.h"
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#include "zx_vou.h"
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struct zx_drm_private {
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struct drm_fbdev_cma *fbdev;
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};
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static void zx_drm_fb_output_poll_changed(struct drm_device *drm)
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{
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struct zx_drm_private *priv = drm->dev_private;
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drm_fbdev_cma_hotplug_event(priv->fbdev);
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}
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static const struct drm_mode_config_funcs zx_drm_mode_config_funcs = {
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.fb_create = drm_fb_cma_create,
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.output_poll_changed = zx_drm_fb_output_poll_changed,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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};
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static void zx_drm_lastclose(struct drm_device *drm)
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{
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struct zx_drm_private *priv = drm->dev_private;
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drm_fbdev_cma_restore_mode(priv->fbdev);
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}
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static const struct file_operations zx_drm_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = drm_compat_ioctl,
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#endif
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.poll = drm_poll,
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.read = drm_read,
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.llseek = noop_llseek,
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.mmap = drm_gem_cma_mmap,
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};
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static struct drm_driver zx_drm_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
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DRIVER_ATOMIC,
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.lastclose = zx_drm_lastclose,
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.get_vblank_counter = drm_vblank_no_hw_counter,
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.enable_vblank = zx_vou_enable_vblank,
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.disable_vblank = zx_vou_disable_vblank,
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.gem_free_object = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.dumb_create = drm_gem_cma_dumb_create,
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.dumb_map_offset = drm_gem_cma_dumb_map_offset,
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.dumb_destroy = drm_gem_dumb_destroy,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
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.gem_prime_vmap = drm_gem_cma_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = drm_gem_cma_prime_mmap,
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.fops = &zx_drm_fops,
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.name = "zx-vou",
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.desc = "ZTE VOU Controller DRM",
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.date = "20160811",
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.major = 1,
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.minor = 0,
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};
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static int zx_drm_bind(struct device *dev)
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{
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struct drm_device *drm;
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struct zx_drm_private *priv;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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drm = drm_dev_alloc(&zx_drm_driver, dev);
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if (IS_ERR(drm))
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return PTR_ERR(drm);
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drm->dev_private = priv;
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dev_set_drvdata(dev, drm);
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drm_mode_config_init(drm);
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drm->mode_config.min_width = 16;
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drm->mode_config.min_height = 16;
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drm->mode_config.max_width = 4096;
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drm->mode_config.max_height = 4096;
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drm->mode_config.funcs = &zx_drm_mode_config_funcs;
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ret = component_bind_all(dev, drm);
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if (ret) {
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DRM_DEV_ERROR(dev, "failed to bind all components: %d\n", ret);
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goto out_unregister;
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}
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ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
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if (ret < 0) {
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DRM_DEV_ERROR(dev, "failed to init vblank: %d\n", ret);
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goto out_unbind;
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}
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/*
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* We will manage irq handler on our own. In this case, irq_enabled
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* need to be true for using vblank core support.
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*/
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drm->irq_enabled = true;
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drm_mode_config_reset(drm);
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drm_kms_helper_poll_init(drm);
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priv->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
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drm->mode_config.num_connector);
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if (IS_ERR(priv->fbdev)) {
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ret = PTR_ERR(priv->fbdev);
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DRM_DEV_ERROR(dev, "failed to init cma fbdev: %d\n", ret);
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priv->fbdev = NULL;
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goto out_poll_fini;
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}
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ret = drm_dev_register(drm, 0);
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if (ret)
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goto out_fbdev_fini;
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return 0;
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out_fbdev_fini:
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if (priv->fbdev) {
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drm_fbdev_cma_fini(priv->fbdev);
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priv->fbdev = NULL;
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}
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out_poll_fini:
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drm_kms_helper_poll_fini(drm);
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drm_mode_config_cleanup(drm);
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drm_vblank_cleanup(drm);
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out_unbind:
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component_unbind_all(dev, drm);
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out_unregister:
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dev_set_drvdata(dev, NULL);
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drm->dev_private = NULL;
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drm_dev_unref(drm);
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return ret;
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}
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static void zx_drm_unbind(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct zx_drm_private *priv = drm->dev_private;
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drm_dev_unregister(drm);
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if (priv->fbdev) {
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drm_fbdev_cma_fini(priv->fbdev);
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priv->fbdev = NULL;
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}
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drm_kms_helper_poll_fini(drm);
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drm_mode_config_cleanup(drm);
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drm_vblank_cleanup(drm);
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component_unbind_all(dev, drm);
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dev_set_drvdata(dev, NULL);
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drm->dev_private = NULL;
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drm_dev_unref(drm);
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}
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static const struct component_master_ops zx_drm_master_ops = {
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.bind = zx_drm_bind,
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.unbind = zx_drm_unbind,
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};
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static int compare_of(struct device *dev, void *data)
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{
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return dev->of_node == data;
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}
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static int zx_drm_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *parent = dev->of_node;
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struct device_node *child;
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struct component_match *match = NULL;
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int ret;
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ret = of_platform_populate(parent, NULL, NULL, dev);
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if (ret)
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return ret;
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for_each_available_child_of_node(parent, child) {
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component_match_add(dev, &match, compare_of, child);
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of_node_put(child);
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}
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return component_master_add_with_match(dev, &zx_drm_master_ops, match);
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}
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static int zx_drm_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &zx_drm_master_ops);
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return 0;
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}
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static const struct of_device_id zx_drm_of_match[] = {
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{ .compatible = "zte,zx296718-vou", },
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{ /* end */ },
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};
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MODULE_DEVICE_TABLE(of, zx_drm_of_match);
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static struct platform_driver zx_drm_platform_driver = {
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.probe = zx_drm_probe,
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.remove = zx_drm_remove,
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.driver = {
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.name = "zx-drm",
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.of_match_table = zx_drm_of_match,
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},
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};
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static struct platform_driver *drivers[] = {
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&zx_crtc_driver,
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&zx_hdmi_driver,
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&zx_drm_platform_driver,
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};
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static int zx_drm_init(void)
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{
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return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
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}
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module_init(zx_drm_init);
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static void zx_drm_exit(void)
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{
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platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
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}
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module_exit(zx_drm_exit);
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MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
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MODULE_DESCRIPTION("ZTE ZX VOU DRM driver");
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MODULE_LICENSE("GPL v2");
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