405 lines
9.7 KiB
C
405 lines
9.7 KiB
C
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/*
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* Copyright 2015 Freescale Semiconductor, Inc.
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*
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* Freescale DCU drm device driver
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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/clk-provider.h>
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#include <linux/io.h>
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#include <linux/mfd/syscon.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.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_gem_cma_helper.h>
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#include "fsl_dcu_drm_crtc.h"
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#include "fsl_dcu_drm_drv.h"
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static const struct regmap_config fsl_dcu_regmap_config = {
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.reg_bits = 32,
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.reg_stride = 4,
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.val_bits = 32,
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.cache_type = REGCACHE_RBTREE,
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};
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static int fsl_dcu_drm_irq_init(struct drm_device *dev)
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{
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struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
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unsigned int value;
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int ret;
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ret = drm_irq_install(dev, fsl_dev->irq);
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if (ret < 0)
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dev_err(dev->dev, "failed to install IRQ handler\n");
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ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
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if (ret)
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dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
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ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
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if (ret)
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dev_err(dev->dev, "read DCU_INT_MASK failed\n");
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value &= DCU_INT_MASK_VBLANK;
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ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
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if (ret)
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dev_err(dev->dev, "set DCU_INT_MASK failed\n");
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ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
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DCU_UPDATE_MODE_READREG);
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if (ret)
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dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
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return ret;
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}
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static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
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{
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struct device *dev = drm->dev;
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struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
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int ret;
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ret = fsl_dcu_drm_modeset_init(fsl_dev);
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if (ret < 0) {
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dev_err(dev, "failed to initialize mode setting\n");
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return ret;
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}
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ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
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if (ret < 0) {
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dev_err(dev, "failed to initialize vblank\n");
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goto done;
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}
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drm->vblank_disable_allowed = true;
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ret = fsl_dcu_drm_irq_init(drm);
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if (ret < 0)
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goto done;
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drm->irq_enabled = true;
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fsl_dcu_fbdev_init(drm);
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return 0;
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done:
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if (ret) {
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drm_mode_config_cleanup(drm);
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drm_vblank_cleanup(drm);
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drm_irq_uninstall(drm);
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drm->dev_private = NULL;
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}
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return ret;
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}
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static int fsl_dcu_unload(struct drm_device *dev)
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{
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drm_mode_config_cleanup(dev);
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drm_vblank_cleanup(dev);
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drm_irq_uninstall(dev);
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dev->dev_private = NULL;
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return 0;
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}
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static void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file)
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{
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}
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static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
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{
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struct drm_device *dev = arg;
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struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
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unsigned int int_status;
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int ret;
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ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
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if (ret)
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dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
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if (int_status & DCU_INT_STATUS_VBLANK)
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drm_handle_vblank(dev, 0);
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ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
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if (ret)
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dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
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ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
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DCU_UPDATE_MODE_READREG);
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if (ret)
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dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
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return IRQ_HANDLED;
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}
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static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, int crtc)
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{
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struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
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unsigned int value;
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int ret;
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ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
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if (ret)
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dev_err(dev->dev, "read DCU_INT_MASK failed\n");
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value &= ~DCU_INT_MASK_VBLANK;
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ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
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if (ret)
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dev_err(dev->dev, "set DCU_INT_MASK failed\n");
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return 0;
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}
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static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, int crtc)
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{
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struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
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unsigned int value;
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int ret;
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ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
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if (ret)
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dev_err(dev->dev, "read DCU_INT_MASK failed\n");
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value |= DCU_INT_MASK_VBLANK;
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ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
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if (ret)
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dev_err(dev->dev, "set DCU_INT_MASK failed\n");
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}
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static const struct file_operations fsl_dcu_drm_fops = {
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.owner = THIS_MODULE,
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.open = drm_open,
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.release = drm_release,
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.unlocked_ioctl = drm_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = drm_compat_ioctl,
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#endif
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.poll = drm_poll,
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.read = drm_read,
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.llseek = no_llseek,
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.mmap = drm_gem_cma_mmap,
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};
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static struct drm_driver fsl_dcu_drm_driver = {
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.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
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| DRIVER_PRIME | DRIVER_ATOMIC,
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.load = fsl_dcu_load,
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.unload = fsl_dcu_unload,
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.preclose = fsl_dcu_drm_preclose,
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.irq_handler = fsl_dcu_drm_irq,
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.get_vblank_counter = drm_vblank_count,
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.enable_vblank = fsl_dcu_drm_enable_vblank,
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.disable_vblank = fsl_dcu_drm_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 = 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 = &fsl_dcu_drm_fops,
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.name = "fsl-dcu-drm",
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.desc = "Freescale DCU DRM",
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.date = "20150213",
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.major = 1,
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.minor = 0,
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};
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#ifdef CONFIG_PM_SLEEP
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static int fsl_dcu_drm_pm_suspend(struct device *dev)
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{
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struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
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if (!fsl_dev)
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return 0;
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drm_kms_helper_poll_disable(fsl_dev->drm);
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regcache_cache_only(fsl_dev->regmap, true);
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regcache_mark_dirty(fsl_dev->regmap);
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clk_disable(fsl_dev->clk);
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clk_unprepare(fsl_dev->clk);
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return 0;
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}
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static int fsl_dcu_drm_pm_resume(struct device *dev)
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{
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struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
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int ret;
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if (!fsl_dev)
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return 0;
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ret = clk_enable(fsl_dev->clk);
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if (ret < 0) {
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dev_err(dev, "failed to enable dcu clk\n");
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clk_unprepare(fsl_dev->clk);
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return ret;
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}
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ret = clk_prepare(fsl_dev->clk);
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if (ret < 0) {
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dev_err(dev, "failed to prepare dcu clk\n");
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return ret;
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}
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drm_kms_helper_poll_enable(fsl_dev->drm);
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regcache_cache_only(fsl_dev->regmap, false);
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regcache_sync(fsl_dev->regmap);
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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 fsl_dcu_drm_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
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};
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static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
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.name = "ls1021a",
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.total_layer = 16,
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.max_layer = 4,
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};
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static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
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.name = "vf610",
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.total_layer = 64,
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.max_layer = 6,
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};
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static const struct of_device_id fsl_dcu_of_match[] = {
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{
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.compatible = "fsl,ls1021a-dcu",
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.data = &fsl_dcu_ls1021a_data,
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}, {
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.compatible = "fsl,vf610-dcu",
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.data = &fsl_dcu_vf610_data,
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}, {
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},
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};
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MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
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static int fsl_dcu_drm_probe(struct platform_device *pdev)
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{
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struct fsl_dcu_drm_device *fsl_dev;
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struct drm_device *drm;
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struct device *dev = &pdev->dev;
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struct resource *res;
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void __iomem *base;
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struct drm_driver *driver = &fsl_dcu_drm_driver;
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const struct of_device_id *id;
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int ret;
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fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
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if (!fsl_dev)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(dev, "could not get memory IO resource\n");
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return -ENODEV;
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}
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base = devm_ioremap_resource(dev, res);
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if (IS_ERR(base)) {
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ret = PTR_ERR(base);
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return ret;
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}
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fsl_dev->irq = platform_get_irq(pdev, 0);
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if (fsl_dev->irq < 0) {
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dev_err(dev, "failed to get irq\n");
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return -ENXIO;
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}
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fsl_dev->clk = devm_clk_get(dev, "dcu");
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if (IS_ERR(fsl_dev->clk)) {
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ret = PTR_ERR(fsl_dev->clk);
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dev_err(dev, "failed to get dcu clock\n");
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return ret;
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}
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ret = clk_prepare(fsl_dev->clk);
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if (ret < 0) {
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dev_err(dev, "failed to prepare dcu clk\n");
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return ret;
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}
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ret = clk_enable(fsl_dev->clk);
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if (ret < 0) {
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dev_err(dev, "failed to enable dcu clk\n");
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clk_unprepare(fsl_dev->clk);
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return ret;
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}
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fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
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&fsl_dcu_regmap_config);
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if (IS_ERR(fsl_dev->regmap)) {
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dev_err(dev, "regmap init failed\n");
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return PTR_ERR(fsl_dev->regmap);
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}
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id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
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if (!id)
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return -ENODEV;
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fsl_dev->soc = id->data;
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drm = drm_dev_alloc(driver, dev);
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if (!drm)
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return -ENOMEM;
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fsl_dev->dev = dev;
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fsl_dev->drm = drm;
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fsl_dev->np = dev->of_node;
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drm->dev_private = fsl_dev;
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dev_set_drvdata(dev, fsl_dev);
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drm_dev_set_unique(drm, dev_name(dev));
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ret = drm_dev_register(drm, 0);
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if (ret < 0)
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goto unref;
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DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
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driver->major, driver->minor, driver->patchlevel,
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driver->date, drm->primary->index);
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return 0;
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unref:
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drm_dev_unref(drm);
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return ret;
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}
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static int fsl_dcu_drm_remove(struct platform_device *pdev)
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{
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struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
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drm_put_dev(fsl_dev->drm);
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return 0;
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}
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static struct platform_driver fsl_dcu_drm_platform_driver = {
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.probe = fsl_dcu_drm_probe,
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.remove = fsl_dcu_drm_remove,
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.driver = {
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.name = "fsl-dcu",
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.pm = &fsl_dcu_drm_pm_ops,
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.of_match_table = fsl_dcu_of_match,
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},
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};
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module_platform_driver(fsl_dcu_drm_platform_driver);
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MODULE_DESCRIPTION("Freescale DCU DRM Driver");
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MODULE_LICENSE("GPL");
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