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0f2886057b
There are many reasons other than ENOMEM that drm_dev_init() can fail. Return ERR_PTR rather than NULL to be able to distinguish these in the caller. Signed-off-by: Tom Gundersen <teg@jklm.no> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/20160921145919.13754-2-teg@jklm.no
502 lines
12 KiB
C
502 lines
12 KiB
C
/*
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* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
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* Author:Mark Yao <mark.yao@rock-chips.com>
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*
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* based on exynos_drm_drv.c
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <asm/dma-iommu.h>
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#include <drm/drmP.h>
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#include <drm/drm_crtc_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 <linux/dma-mapping.h>
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#include <linux/pm_runtime.h>
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#include <linux/module.h>
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#include <linux/of_graph.h>
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#include <linux/component.h>
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#include <linux/console.h>
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#include "rockchip_drm_drv.h"
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#include "rockchip_drm_fb.h"
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#include "rockchip_drm_fbdev.h"
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#include "rockchip_drm_gem.h"
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#define DRIVER_NAME "rockchip"
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#define DRIVER_DESC "RockChip Soc DRM"
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#define DRIVER_DATE "20140818"
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#define DRIVER_MAJOR 1
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#define DRIVER_MINOR 0
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static bool is_support_iommu = true;
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static struct drm_driver rockchip_drm_driver;
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/*
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* Attach a (component) device to the shared drm dma mapping from master drm
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* device. This is used by the VOPs to map GEM buffers to a common DMA
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* mapping.
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*/
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int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
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struct device *dev)
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{
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struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
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int ret;
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if (!is_support_iommu)
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return 0;
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ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
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return arm_iommu_attach_device(dev, mapping);
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}
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void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
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struct device *dev)
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{
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if (!is_support_iommu)
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return;
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arm_iommu_detach_device(dev);
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}
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int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
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const struct rockchip_crtc_funcs *crtc_funcs)
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{
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int pipe = drm_crtc_index(crtc);
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struct rockchip_drm_private *priv = crtc->dev->dev_private;
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if (pipe >= ROCKCHIP_MAX_CRTC)
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return -EINVAL;
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priv->crtc_funcs[pipe] = crtc_funcs;
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return 0;
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}
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void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
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{
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int pipe = drm_crtc_index(crtc);
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struct rockchip_drm_private *priv = crtc->dev->dev_private;
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if (pipe >= ROCKCHIP_MAX_CRTC)
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return;
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priv->crtc_funcs[pipe] = NULL;
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}
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static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
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int pipe)
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{
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struct drm_crtc *crtc;
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int i = 0;
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list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
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if (i++ == pipe)
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return crtc;
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return NULL;
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}
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static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
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unsigned int pipe)
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{
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struct rockchip_drm_private *priv = dev->dev_private;
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struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
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if (crtc && priv->crtc_funcs[pipe] &&
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priv->crtc_funcs[pipe]->enable_vblank)
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return priv->crtc_funcs[pipe]->enable_vblank(crtc);
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return 0;
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}
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static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
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unsigned int pipe)
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{
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struct rockchip_drm_private *priv = dev->dev_private;
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struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
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if (crtc && priv->crtc_funcs[pipe] &&
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priv->crtc_funcs[pipe]->enable_vblank)
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priv->crtc_funcs[pipe]->disable_vblank(crtc);
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}
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static int rockchip_drm_bind(struct device *dev)
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{
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struct drm_device *drm_dev;
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struct rockchip_drm_private *private;
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struct dma_iommu_mapping *mapping = NULL;
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int ret;
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drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
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if (IS_ERR(drm_dev))
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return PTR_ERR(drm_dev);
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dev_set_drvdata(dev, drm_dev);
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private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
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if (!private) {
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ret = -ENOMEM;
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goto err_free;
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}
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drm_dev->dev_private = private;
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INIT_LIST_HEAD(&private->psr_list);
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spin_lock_init(&private->psr_list_lock);
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drm_mode_config_init(drm_dev);
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rockchip_drm_mode_config_init(drm_dev);
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dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
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GFP_KERNEL);
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if (!dev->dma_parms) {
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ret = -ENOMEM;
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goto err_config_cleanup;
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}
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if (is_support_iommu) {
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/* TODO(djkurtz): fetch the mapping start/size from somewhere */
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mapping = arm_iommu_create_mapping(&platform_bus_type,
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0x00000000,
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SZ_2G);
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if (IS_ERR(mapping)) {
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ret = PTR_ERR(mapping);
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goto err_config_cleanup;
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}
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ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
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if (ret)
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goto err_release_mapping;
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dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
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ret = arm_iommu_attach_device(dev, mapping);
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if (ret)
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goto err_release_mapping;
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}
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/* Try to bind all sub drivers. */
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ret = component_bind_all(dev, drm_dev);
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if (ret)
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goto err_detach_device;
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/* init kms poll for handling hpd */
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drm_kms_helper_poll_init(drm_dev);
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/*
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* enable drm irq mode.
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* - with irq_enabled = true, we can use the vblank feature.
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*/
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drm_dev->irq_enabled = true;
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ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
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if (ret)
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goto err_kms_helper_poll_fini;
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drm_mode_config_reset(drm_dev);
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ret = rockchip_drm_fbdev_init(drm_dev);
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if (ret)
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goto err_vblank_cleanup;
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ret = drm_dev_register(drm_dev, 0);
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if (ret)
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goto err_fbdev_fini;
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if (is_support_iommu)
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arm_iommu_release_mapping(mapping);
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return 0;
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err_fbdev_fini:
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rockchip_drm_fbdev_fini(drm_dev);
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err_vblank_cleanup:
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drm_vblank_cleanup(drm_dev);
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err_kms_helper_poll_fini:
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drm_kms_helper_poll_fini(drm_dev);
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component_unbind_all(dev, drm_dev);
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err_detach_device:
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if (is_support_iommu)
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arm_iommu_detach_device(dev);
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err_release_mapping:
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if (is_support_iommu)
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arm_iommu_release_mapping(mapping);
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err_config_cleanup:
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drm_mode_config_cleanup(drm_dev);
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drm_dev->dev_private = NULL;
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err_free:
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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 rockchip_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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rockchip_drm_fbdev_fini(drm_dev);
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drm_vblank_cleanup(drm_dev);
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drm_kms_helper_poll_fini(drm_dev);
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component_unbind_all(dev, drm_dev);
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if (is_support_iommu)
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arm_iommu_detach_device(dev);
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drm_mode_config_cleanup(drm_dev);
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drm_dev->dev_private = NULL;
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drm_dev_unregister(drm_dev);
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drm_dev_unref(drm_dev);
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dev_set_drvdata(dev, NULL);
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}
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static void rockchip_drm_lastclose(struct drm_device *dev)
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{
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struct rockchip_drm_private *priv = dev->dev_private;
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drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
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}
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static const struct file_operations rockchip_drm_driver_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.mmap = rockchip_gem_mmap,
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.poll = drm_poll,
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.read = drm_read,
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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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.release = drm_release,
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};
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static struct drm_driver rockchip_drm_driver = {
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.driver_features = DRIVER_MODESET | DRIVER_GEM |
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DRIVER_PRIME | DRIVER_ATOMIC,
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.lastclose = rockchip_drm_lastclose,
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.get_vblank_counter = drm_vblank_no_hw_counter,
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.enable_vblank = rockchip_drm_crtc_enable_vblank,
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.disable_vblank = rockchip_drm_crtc_disable_vblank,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.gem_free_object_unlocked = rockchip_gem_free_object,
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.dumb_create = rockchip_gem_dumb_create,
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.dumb_map_offset = rockchip_gem_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_import = drm_gem_prime_import,
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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
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.gem_prime_vmap = rockchip_gem_prime_vmap,
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.gem_prime_vunmap = rockchip_gem_prime_vunmap,
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.gem_prime_mmap = rockchip_gem_mmap_buf,
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.fops = &rockchip_drm_driver_fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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};
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#ifdef CONFIG_PM_SLEEP
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void rockchip_drm_fb_suspend(struct drm_device *drm)
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{
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struct rockchip_drm_private *priv = drm->dev_private;
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console_lock();
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drm_fb_helper_set_suspend(&priv->fbdev_helper, 1);
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console_unlock();
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}
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void rockchip_drm_fb_resume(struct drm_device *drm)
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{
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struct rockchip_drm_private *priv = drm->dev_private;
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console_lock();
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drm_fb_helper_set_suspend(&priv->fbdev_helper, 0);
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console_unlock();
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}
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static int rockchip_drm_sys_suspend(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct rockchip_drm_private *priv = drm->dev_private;
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drm_kms_helper_poll_disable(drm);
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rockchip_drm_fb_suspend(drm);
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priv->state = drm_atomic_helper_suspend(drm);
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if (IS_ERR(priv->state)) {
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rockchip_drm_fb_resume(drm);
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drm_kms_helper_poll_enable(drm);
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return PTR_ERR(priv->state);
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}
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return 0;
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}
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static int rockchip_drm_sys_resume(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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struct rockchip_drm_private *priv = drm->dev_private;
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drm_atomic_helper_resume(drm, priv->state);
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rockchip_drm_fb_resume(drm);
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drm_kms_helper_poll_enable(drm);
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return 0;
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}
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#endif
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static const struct dev_pm_ops rockchip_drm_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
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rockchip_drm_sys_resume)
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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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struct device_node *np = data;
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return dev->of_node == np;
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}
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static void rockchip_add_endpoints(struct device *dev,
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struct component_match **match,
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struct device_node *port)
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{
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struct device_node *ep, *remote;
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for_each_child_of_node(port, ep) {
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remote = of_graph_get_remote_port_parent(ep);
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if (!remote || !of_device_is_available(remote)) {
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of_node_put(remote);
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continue;
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} else if (!of_device_is_available(remote->parent)) {
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dev_warn(dev, "parent device of %s is not available\n",
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remote->full_name);
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of_node_put(remote);
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continue;
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}
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component_match_add(dev, match, compare_of, remote);
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of_node_put(remote);
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}
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}
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static const struct component_master_ops rockchip_drm_ops = {
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.bind = rockchip_drm_bind,
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.unbind = rockchip_drm_unbind,
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};
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static int rockchip_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 component_match *match = NULL;
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struct device_node *np = dev->of_node;
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struct device_node *port;
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int i;
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if (!np)
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return -ENODEV;
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/*
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* Bind the crtc ports first, so that
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* drm_of_find_possible_crtcs called from encoder .bind callbacks
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* works as expected.
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*/
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for (i = 0;; i++) {
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struct device_node *iommu;
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port = of_parse_phandle(np, "ports", i);
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if (!port)
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break;
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if (!of_device_is_available(port->parent)) {
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of_node_put(port);
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continue;
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}
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iommu = of_parse_phandle(port->parent, "iommus", 0);
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if (!iommu || !of_device_is_available(iommu->parent)) {
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dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
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port->parent->full_name);
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/*
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* if there is a crtc not support iommu, force set all
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* crtc use non-iommu buffer.
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*/
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is_support_iommu = false;
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}
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of_node_put(iommu);
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component_match_add(dev, &match, compare_of, port->parent);
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of_node_put(port);
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}
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if (i == 0) {
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dev_err(dev, "missing 'ports' property\n");
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return -ENODEV;
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}
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if (!match) {
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dev_err(dev, "No available vop found for display-subsystem.\n");
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return -ENODEV;
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}
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/*
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* For each bound crtc, bind the encoders attached to its
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* remote endpoint.
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*/
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for (i = 0;; i++) {
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port = of_parse_phandle(np, "ports", i);
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if (!port)
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break;
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if (!of_device_is_available(port->parent)) {
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of_node_put(port);
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continue;
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}
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rockchip_add_endpoints(dev, &match, port);
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of_node_put(port);
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}
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return component_master_add_with_match(dev, &rockchip_drm_ops, match);
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}
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static int rockchip_drm_platform_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &rockchip_drm_ops);
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return 0;
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}
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static const struct of_device_id rockchip_drm_dt_ids[] = {
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{ .compatible = "rockchip,display-subsystem", },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
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static struct platform_driver rockchip_drm_platform_driver = {
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.probe = rockchip_drm_platform_probe,
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.remove = rockchip_drm_platform_remove,
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.driver = {
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.name = "rockchip-drm",
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.of_match_table = rockchip_drm_dt_ids,
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.pm = &rockchip_drm_pm_ops,
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},
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};
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module_platform_driver(rockchip_drm_platform_driver);
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MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
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MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
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MODULE_LICENSE("GPL v2");
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