forked from Minki/linux
86418f90a4
Convert drivers to use the new of_graph_get_remote_node() helper instead of parsing the endpoint node and then getting the remote device node. Now drivers can just specify the device node and which port/endpoint and get back the connected remote device node. The details of the graph binding are nicely abstracted into the core OF graph code. This changes some error messages to debug messages (in the graph core). Graph connections are often "no connects" depending on the particular board, so we want to avoid spurious messages. Plus the kernel is not a DT validator. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Tested-by: Liviu Dudau <liviu.dudau@arm.com> Tested-by: Eric Anholt <eric@anholt.net> Tested-by: Jyri Sarha <jsarha@ti.com> Tested by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Sean Paul <seanpaul@chromium.org>
289 lines
7.0 KiB
C
289 lines
7.0 KiB
C
/*
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* Hisilicon Kirin SoCs drm master driver
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*
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* Copyright (c) 2016 Linaro Limited.
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* Copyright (c) 2014-2016 Hisilicon Limited.
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*
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* Author:
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* Xinliang Liu <z.liuxinliang@hisilicon.com>
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* Xinliang Liu <xinliang.liu@linaro.org>
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* Xinwei Kong <kong.kongxinwei@hisilicon.com>
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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/of_platform.h>
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#include <linux/component.h>
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#include <linux/of_graph.h>
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#include <drm/drmP.h>
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#include <drm/drm_gem_cma_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_of.h>
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#include "kirin_drm_drv.h"
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static struct kirin_dc_ops *dc_ops;
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static int kirin_drm_kms_cleanup(struct drm_device *dev)
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{
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struct kirin_drm_private *priv = dev->dev_private;
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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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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#endif
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drm_kms_helper_poll_fini(dev);
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drm_vblank_cleanup(dev);
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dc_ops->cleanup(to_platform_device(dev->dev));
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drm_mode_config_cleanup(dev);
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devm_kfree(dev->dev, priv);
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dev->dev_private = NULL;
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return 0;
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}
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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static void kirin_fbdev_output_poll_changed(struct drm_device *dev)
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{
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struct kirin_drm_private *priv = dev->dev_private;
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if (priv->fbdev) {
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drm_fbdev_cma_hotplug_event(priv->fbdev);
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} else {
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priv->fbdev = drm_fbdev_cma_init(dev, 32,
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dev->mode_config.num_connector);
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if (IS_ERR(priv->fbdev))
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priv->fbdev = NULL;
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}
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}
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#endif
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static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = {
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.fb_create = drm_fb_cma_create,
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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.output_poll_changed = kirin_fbdev_output_poll_changed,
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#endif
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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 kirin_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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dev->mode_config.max_width = 2048;
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dev->mode_config.max_height = 2048;
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dev->mode_config.funcs = &kirin_drm_mode_config_funcs;
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}
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static int kirin_drm_kms_init(struct drm_device *dev)
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{
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struct kirin_drm_private *priv;
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int ret;
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priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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dev->dev_private = priv;
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dev_set_drvdata(dev->dev, dev);
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/* dev->mode_config initialization */
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drm_mode_config_init(dev);
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kirin_drm_mode_config_init(dev);
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/* display controller init */
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ret = dc_ops->init(to_platform_device(dev->dev));
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if (ret)
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goto err_mode_config_cleanup;
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/* bind and init sub drivers */
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ret = component_bind_all(dev->dev, dev);
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if (ret) {
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DRM_ERROR("failed to bind all component.\n");
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goto err_dc_cleanup;
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}
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/* vblank init */
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ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
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if (ret) {
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DRM_ERROR("failed to initialize vblank.\n");
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goto err_unbind_all;
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}
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/* with irq_enabled = true, we can use the vblank feature. */
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dev->irq_enabled = true;
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/* reset all the states of crtc/plane/encoder/connector */
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drm_mode_config_reset(dev);
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/* init kms poll for handling hpd */
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drm_kms_helper_poll_init(dev);
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/* force detection after connectors init */
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(void)drm_helper_hpd_irq_event(dev);
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return 0;
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err_unbind_all:
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component_unbind_all(dev->dev, dev);
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err_dc_cleanup:
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dc_ops->cleanup(to_platform_device(dev->dev));
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err_mode_config_cleanup:
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drm_mode_config_cleanup(dev);
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devm_kfree(dev->dev, priv);
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dev->dev_private = NULL;
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return ret;
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}
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DEFINE_DRM_GEM_CMA_FOPS(kirin_drm_fops);
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static int kirin_gem_cma_dumb_create(struct drm_file *file,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args)
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{
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return drm_gem_cma_dumb_create_internal(file, dev, args);
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}
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static struct drm_driver kirin_drm_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
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DRIVER_ATOMIC,
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.fops = &kirin_drm_fops,
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.gem_free_object_unlocked = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.dumb_create = kirin_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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.name = "kirin",
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.desc = "Hisilicon Kirin SoCs' DRM Driver",
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.date = "20150718",
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.major = 1,
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.minor = 0,
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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 kirin_drm_bind(struct device *dev)
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{
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struct drm_driver *driver = &kirin_drm_driver;
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struct drm_device *drm_dev;
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int ret;
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drm_dev = drm_dev_alloc(driver, dev);
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if (IS_ERR(drm_dev))
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return PTR_ERR(drm_dev);
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ret = kirin_drm_kms_init(drm_dev);
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if (ret)
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goto err_drm_dev_unref;
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ret = drm_dev_register(drm_dev, 0);
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if (ret)
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goto err_kms_cleanup;
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return 0;
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err_kms_cleanup:
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kirin_drm_kms_cleanup(drm_dev);
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err_drm_dev_unref:
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drm_dev_unref(drm_dev);
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return ret;
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}
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static void kirin_drm_unbind(struct device *dev)
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{
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struct drm_device *drm_dev = dev_get_drvdata(dev);
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drm_dev_unregister(drm_dev);
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kirin_drm_kms_cleanup(drm_dev);
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drm_dev_unref(drm_dev);
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}
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static const struct component_master_ops kirin_drm_ops = {
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.bind = kirin_drm_bind,
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.unbind = kirin_drm_unbind,
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};
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static int kirin_drm_platform_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 *np = dev->of_node;
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struct component_match *match = NULL;
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struct device_node *remote;
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dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev);
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if (!dc_ops) {
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DRM_ERROR("failed to get dt id data\n");
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return -EINVAL;
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}
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remote = of_graph_get_remote_node(np, 0, 0);
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if (IS_ERR(remote))
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return PTR_ERR(remote);
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drm_of_component_match_add(dev, &match, compare_of, remote);
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of_node_put(remote);
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return component_master_add_with_match(dev, &kirin_drm_ops, match);
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return 0;
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}
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static int kirin_drm_platform_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &kirin_drm_ops);
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dc_ops = NULL;
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return 0;
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}
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static const struct of_device_id kirin_drm_dt_ids[] = {
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{ .compatible = "hisilicon,hi6220-ade",
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.data = &ade_dc_ops,
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},
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{ /* end node */ },
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};
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MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
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static struct platform_driver kirin_drm_platform_driver = {
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.probe = kirin_drm_platform_probe,
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.remove = kirin_drm_platform_remove,
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.driver = {
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.name = "kirin-drm",
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.of_match_table = kirin_drm_dt_ids,
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},
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};
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module_platform_driver(kirin_drm_platform_driver);
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MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
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MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
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MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
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MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
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MODULE_LICENSE("GPL v2");
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