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![Benjamin Gaignard](/assets/img/avatar_default.png)
Make the link between all the hardware drivers and DRM/KMS interface. Create the driver itself and make it register all the sub-components. Use GEM CMA helpers for buffer allocation. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Reviewed-by: Rob Clark <robdclark@gmail.com>
241 lines
6.1 KiB
C
241 lines
6.1 KiB
C
/*
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* Copyright (C) STMicroelectronics SA 2014
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* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
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* License terms: GNU General Public License (GPL), version 2
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*/
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#include <drm/drmP.h>
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#include <linux/component.h>
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#include <linux/debugfs.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <drm/drm_crtc_helper.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 "sti_drm_drv.h"
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#include "sti_drm_crtc.h"
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#define DRIVER_NAME "sti"
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#define DRIVER_DESC "STMicroelectronics SoC DRM"
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#define DRIVER_DATE "20140601"
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#define DRIVER_MAJOR 1
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#define DRIVER_MINOR 0
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#define STI_MAX_FB_HEIGHT 4096
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#define STI_MAX_FB_WIDTH 4096
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static struct drm_mode_config_funcs sti_drm_mode_config_funcs = {
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.fb_create = drm_fb_cma_create,
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};
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static void sti_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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/*
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* set max width and height as default value.
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* this value would be used to check framebuffer size limitation
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* at drm_mode_addfb().
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*/
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dev->mode_config.max_width = STI_MAX_FB_HEIGHT;
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dev->mode_config.max_height = STI_MAX_FB_WIDTH;
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dev->mode_config.funcs = &sti_drm_mode_config_funcs;
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}
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static int sti_drm_load(struct drm_device *dev, unsigned long flags)
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{
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struct sti_drm_private *private;
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int ret;
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private = kzalloc(sizeof(struct sti_drm_private), GFP_KERNEL);
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if (!private) {
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DRM_ERROR("Failed to allocate private\n");
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return -ENOMEM;
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}
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dev->dev_private = (void *)private;
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private->drm_dev = dev;
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drm_mode_config_init(dev);
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drm_kms_helper_poll_init(dev);
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sti_drm_mode_config_init(dev);
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ret = component_bind_all(dev->dev, dev);
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if (ret)
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return ret;
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drm_helper_disable_unused_functions(dev);
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#ifdef CONFIG_DRM_STI_FBDEV
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drm_fbdev_cma_init(dev, 32,
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dev->mode_config.num_crtc,
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dev->mode_config.num_connector);
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#endif
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return 0;
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}
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static const struct file_operations sti_drm_driver_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.mmap = drm_gem_cma_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 dma_buf *sti_drm_gem_prime_export(struct drm_device *dev,
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struct drm_gem_object *obj,
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int flags)
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{
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/* we want to be able to write in mmapped buffer */
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flags |= O_RDWR;
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return drm_gem_prime_export(dev, obj, flags);
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}
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static struct drm_driver sti_drm_driver = {
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.driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET |
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DRIVER_GEM | DRIVER_PRIME,
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.load = sti_drm_load,
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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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.fops = &sti_drm_driver_fops,
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.get_vblank_counter = drm_vblank_count,
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.enable_vblank = sti_drm_crtc_enable_vblank,
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.disable_vblank = sti_drm_crtc_disable_vblank,
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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 = sti_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 = 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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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 sti_drm_bind(struct device *dev)
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{
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return drm_platform_init(&sti_drm_driver, to_platform_device(dev));
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}
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static void sti_drm_unbind(struct device *dev)
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{
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drm_put_dev(dev_get_drvdata(dev));
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}
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static const struct component_master_ops sti_drm_ops = {
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.bind = sti_drm_bind,
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.unbind = sti_drm_unbind,
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};
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static int sti_drm_master_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 *node = dev->parent->of_node;
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struct device_node *child_np;
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struct component_match *match = NULL;
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dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
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child_np = of_get_next_available_child(node, NULL);
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while (child_np) {
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component_match_add(dev, &match, compare_of, child_np);
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of_node_put(child_np);
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child_np = of_get_next_available_child(node, child_np);
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}
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return component_master_add_with_match(dev, &sti_drm_ops, match);
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}
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static int sti_drm_master_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &sti_drm_ops);
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return 0;
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}
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static struct platform_driver sti_drm_master_driver = {
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.probe = sti_drm_master_probe,
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.remove = sti_drm_master_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = DRIVER_NAME "__master",
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},
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};
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static int sti_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 *node = dev->of_node;
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struct platform_device *master;
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of_platform_populate(node, NULL, NULL, dev);
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platform_driver_register(&sti_drm_master_driver);
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master = platform_device_register_resndata(dev,
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DRIVER_NAME "__master", -1,
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NULL, 0, NULL, 0);
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if (!master)
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return -EINVAL;
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platform_set_drvdata(pdev, master);
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return 0;
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}
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static int sti_drm_platform_remove(struct platform_device *pdev)
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{
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struct platform_device *master = platform_get_drvdata(pdev);
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of_platform_depopulate(&pdev->dev);
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platform_device_unregister(master);
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platform_driver_unregister(&sti_drm_master_driver);
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return 0;
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}
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static const struct of_device_id sti_drm_dt_ids[] = {
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{ .compatible = "st,sti-display-subsystem", },
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{ /* end node */ },
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};
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MODULE_DEVICE_TABLE(of, sti_drm_dt_ids);
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static struct platform_driver sti_drm_platform_driver = {
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.probe = sti_drm_platform_probe,
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.remove = sti_drm_platform_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = DRIVER_NAME,
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.of_match_table = sti_drm_dt_ids,
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},
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};
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module_platform_driver(sti_drm_platform_driver);
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MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
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MODULE_LICENSE("GPL");
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