321 lines
8.0 KiB
C
321 lines
8.0 KiB
C
/*
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* rcar_du_drv.c -- R-Car Display Unit DRM driver
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*
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* Copyright (C) 2013 Renesas Corporation
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*
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* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/slab.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_cma_helper.h>
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#include <drm/drm_gem_cma_helper.h>
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#include "rcar_du_crtc.h"
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#include "rcar_du_drv.h"
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#include "rcar_du_kms.h"
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#include "rcar_du_regs.h"
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/* -----------------------------------------------------------------------------
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* DRM operations
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*/
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static int rcar_du_unload(struct drm_device *dev)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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if (rcdu->fbdev)
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drm_fbdev_cma_fini(rcdu->fbdev);
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drm_kms_helper_poll_fini(dev);
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drm_mode_config_cleanup(dev);
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drm_vblank_cleanup(dev);
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dev->irq_enabled = 0;
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dev->dev_private = NULL;
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return 0;
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}
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static int rcar_du_load(struct drm_device *dev, unsigned long flags)
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{
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struct platform_device *pdev = dev->platformdev;
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struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
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struct rcar_du_device *rcdu;
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struct resource *mem;
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int ret;
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if (pdata == NULL) {
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dev_err(dev->dev, "no platform data\n");
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return -ENODEV;
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}
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rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
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if (rcdu == NULL) {
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dev_err(dev->dev, "failed to allocate private data\n");
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return -ENOMEM;
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}
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rcdu->dev = &pdev->dev;
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rcdu->pdata = pdata;
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rcdu->info = (struct rcar_du_device_info *)pdev->id_entry->driver_data;
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rcdu->ddev = dev;
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dev->dev_private = rcdu;
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/* I/O resources */
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
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if (IS_ERR(rcdu->mmio))
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return PTR_ERR(rcdu->mmio);
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/* DRM/KMS objects */
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ret = rcar_du_modeset_init(rcdu);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
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goto done;
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}
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/* vblank handling */
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ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
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if (ret < 0) {
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dev_err(&pdev->dev, "failed to initialize vblank\n");
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goto done;
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}
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dev->irq_enabled = 1;
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platform_set_drvdata(pdev, rcdu);
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done:
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if (ret)
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rcar_du_unload(dev);
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return ret;
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}
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static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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unsigned int i;
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for (i = 0; i < rcdu->num_crtcs; ++i)
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rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
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}
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static void rcar_du_lastclose(struct drm_device *dev)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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drm_fbdev_cma_restore_mode(rcdu->fbdev);
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}
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static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
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return 0;
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}
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static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
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{
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struct rcar_du_device *rcdu = dev->dev_private;
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rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
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}
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static const struct file_operations rcar_du_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 = no_llseek,
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.mmap = drm_gem_cma_mmap,
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};
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static struct drm_driver rcar_du_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
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.load = rcar_du_load,
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.unload = rcar_du_unload,
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.preclose = rcar_du_preclose,
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.lastclose = rcar_du_lastclose,
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.get_vblank_counter = drm_vblank_count,
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.enable_vblank = rcar_du_enable_vblank,
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.disable_vblank = rcar_du_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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.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 = 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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.dumb_create = rcar_du_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 = &rcar_du_fops,
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.name = "rcar-du",
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.desc = "Renesas R-Car Display Unit",
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.date = "20130110",
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.major = 1,
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.minor = 0,
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};
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/* -----------------------------------------------------------------------------
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* Power management
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*/
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#if CONFIG_PM_SLEEP
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static int rcar_du_pm_suspend(struct device *dev)
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{
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struct rcar_du_device *rcdu = dev_get_drvdata(dev);
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drm_kms_helper_poll_disable(rcdu->ddev);
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/* TODO Suspend the CRTC */
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return 0;
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}
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static int rcar_du_pm_resume(struct device *dev)
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{
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struct rcar_du_device *rcdu = dev_get_drvdata(dev);
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/* TODO Resume the CRTC */
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drm_kms_helper_poll_enable(rcdu->ddev);
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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 rcar_du_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
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};
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/* -----------------------------------------------------------------------------
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* Platform driver
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*/
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static int rcar_du_probe(struct platform_device *pdev)
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{
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return drm_platform_init(&rcar_du_driver, pdev);
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}
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static int rcar_du_remove(struct platform_device *pdev)
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{
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struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
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drm_put_dev(rcdu->ddev);
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return 0;
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}
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static const struct rcar_du_device_info rcar_du_r8a7779_info = {
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.features = 0,
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.num_crtcs = 2,
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.routes = {
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/* R8A7779 has two RGB outputs and one (currently unsupported)
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* TCON output.
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*/
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[RCAR_DU_OUTPUT_DPAD0] = {
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.possible_crtcs = BIT(0),
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.encoder_type = DRM_MODE_ENCODER_NONE,
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},
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[RCAR_DU_OUTPUT_DPAD1] = {
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.possible_crtcs = BIT(1) | BIT(0),
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.encoder_type = DRM_MODE_ENCODER_NONE,
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},
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},
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.num_lvds = 0,
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};
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static const struct rcar_du_device_info rcar_du_r8a7790_info = {
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.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
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.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
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.num_crtcs = 3,
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.routes = {
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/* R8A7790 has one RGB output, two LVDS outputs and one
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* (currently unsupported) TCON output.
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*/
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[RCAR_DU_OUTPUT_DPAD0] = {
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.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
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.encoder_type = DRM_MODE_ENCODER_NONE,
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},
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[RCAR_DU_OUTPUT_LVDS0] = {
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.possible_crtcs = BIT(0),
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.encoder_type = DRM_MODE_ENCODER_LVDS,
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},
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[RCAR_DU_OUTPUT_LVDS1] = {
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.possible_crtcs = BIT(2) | BIT(1),
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.encoder_type = DRM_MODE_ENCODER_LVDS,
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},
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},
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.num_lvds = 2,
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};
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static const struct rcar_du_device_info rcar_du_r8a7791_info = {
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.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK | RCAR_DU_FEATURE_DEFR8,
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.num_crtcs = 2,
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.routes = {
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/* R8A7791 has one RGB output, one LVDS output and one
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* (currently unsupported) TCON output.
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*/
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[RCAR_DU_OUTPUT_DPAD0] = {
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.possible_crtcs = BIT(1),
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.encoder_type = DRM_MODE_ENCODER_NONE,
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},
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[RCAR_DU_OUTPUT_LVDS0] = {
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.possible_crtcs = BIT(0),
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.encoder_type = DRM_MODE_ENCODER_LVDS,
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},
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},
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.num_lvds = 1,
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};
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static const struct platform_device_id rcar_du_id_table[] = {
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{ "rcar-du-r8a7779", (kernel_ulong_t)&rcar_du_r8a7779_info },
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{ "rcar-du-r8a7790", (kernel_ulong_t)&rcar_du_r8a7790_info },
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{ "rcar-du-r8a7791", (kernel_ulong_t)&rcar_du_r8a7791_info },
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{ }
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};
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MODULE_DEVICE_TABLE(platform, rcar_du_id_table);
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static struct platform_driver rcar_du_platform_driver = {
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.probe = rcar_du_probe,
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.remove = rcar_du_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "rcar-du",
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.pm = &rcar_du_pm_ops,
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},
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.id_table = rcar_du_id_table,
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};
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module_platform_driver(rcar_du_platform_driver);
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MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
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MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
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MODULE_LICENSE("GPL");
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