fsl_dcu_drm_drv.c
/*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* Freescale DCU drm device driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include "fsl_dcu_drm_crtc.h"
#include "fsl_dcu_drm_drv.h"
static const struct regmap_config fsl_dcu_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.cache_type = REGCACHE_RBTREE,
};
static int fsl_dcu_drm_irq_init(struct drm_device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value;
int ret;
ret = drm_irq_install(dev, fsl_dev->irq);
if (ret < 0)
dev_err(dev->dev, "failed to install IRQ handler\n");
ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
if (ret)
dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
if (ret)
dev_err(dev->dev, "read DCU_INT_MASK failed\n");
value &= DCU_INT_MASK_VBLANK;
ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
if (ret)
dev_err(dev->dev, "set DCU_INT_MASK failed\n");
ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
DCU_UPDATE_MODE_READREG);
if (ret)
dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
return ret;
}
static int fsl_dcu_load(struct drm_device *drm, unsigned long flags)
{
struct device *dev = drm->dev;
struct fsl_dcu_drm_device *fsl_dev = drm->dev_private;
int ret;
ret = fsl_dcu_drm_modeset_init(fsl_dev);
if (ret < 0) {
dev_err(dev, "failed to initialize mode setting\n");
return ret;
}
ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
if (ret < 0) {
dev_err(dev, "failed to initialize vblank\n");
goto done;
}
drm->vblank_disable_allowed = true;
ret = fsl_dcu_drm_irq_init(drm);
if (ret < 0)
goto done;
drm->irq_enabled = true;
fsl_dcu_fbdev_init(drm);
return 0;
done:
if (ret) {
drm_mode_config_cleanup(drm);
drm_vblank_cleanup(drm);
drm_irq_uninstall(drm);
drm->dev_private = NULL;
}
return ret;
}
static int fsl_dcu_unload(struct drm_device *dev)
{
drm_mode_config_cleanup(dev);
drm_vblank_cleanup(dev);
drm_irq_uninstall(dev);
dev->dev_private = NULL;
return 0;
}
static void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file)
{
}
static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
{
struct drm_device *dev = arg;
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int int_status;
int ret;
ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
if (ret)
dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
if (int_status & DCU_INT_STATUS_VBLANK)
drm_handle_vblank(dev, 0);
ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff);
if (ret)
dev_err(dev->dev, "set DCU_INT_STATUS failed\n");
ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
DCU_UPDATE_MODE_READREG);
if (ret)
dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n");
return IRQ_HANDLED;
}
static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, int crtc)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value;
int ret;
ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
if (ret)
dev_err(dev->dev, "read DCU_INT_MASK failed\n");
value &= ~DCU_INT_MASK_VBLANK;
ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
if (ret)
dev_err(dev->dev, "set DCU_INT_MASK failed\n");
return 0;
}
static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, int crtc)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value;
int ret;
ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
if (ret)
dev_err(dev->dev, "read DCU_INT_MASK failed\n");
value |= DCU_INT_MASK_VBLANK;
ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
if (ret)
dev_err(dev->dev, "set DCU_INT_MASK failed\n");
}
static const struct file_operations fsl_dcu_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct drm_driver fsl_dcu_drm_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
| DRIVER_PRIME | DRIVER_ATOMIC,
.load = fsl_dcu_load,
.unload = fsl_dcu_unload,
.preclose = fsl_dcu_drm_preclose,
.irq_handler = fsl_dcu_drm_irq,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = fsl_dcu_drm_enable_vblank,
.disable_vblank = fsl_dcu_drm_disable_vblank,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.dumb_create = drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.fops = &fsl_dcu_drm_fops,
.name = "fsl-dcu-drm",
.desc = "Freescale DCU DRM",
.date = "20150213",
.major = 1,
.minor = 0,
};
#ifdef CONFIG_PM_SLEEP
static int fsl_dcu_drm_pm_suspend(struct device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
if (!fsl_dev)
return 0;
drm_kms_helper_poll_disable(fsl_dev->drm);
regcache_cache_only(fsl_dev->regmap, true);
regcache_mark_dirty(fsl_dev->regmap);
clk_disable(fsl_dev->clk);
clk_unprepare(fsl_dev->clk);
return 0;
}
static int fsl_dcu_drm_pm_resume(struct device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
int ret;
if (!fsl_dev)
return 0;
ret = clk_enable(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to enable dcu clk\n");
clk_unprepare(fsl_dev->clk);
return ret;
}
ret = clk_prepare(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to prepare dcu clk\n");
return ret;
}
drm_kms_helper_poll_enable(fsl_dev->drm);
regcache_cache_only(fsl_dev->regmap, false);
regcache_sync(fsl_dev->regmap);
return 0;
}
#endif
static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
};
static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
.name = "ls1021a",
.total_layer = 16,
.max_layer = 4,
};
static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
.name = "vf610",
.total_layer = 64,
.max_layer = 6,
};
static const struct of_device_id fsl_dcu_of_match[] = {
{
.compatible = "fsl,ls1021a-dcu",
.data = &fsl_dcu_ls1021a_data,
}, {
.compatible = "fsl,vf610-dcu",
.data = &fsl_dcu_vf610_data,
}, {
},
};
MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
static int fsl_dcu_drm_probe(struct platform_device *pdev)
{
struct fsl_dcu_drm_device *fsl_dev;
struct drm_device *drm;
struct device *dev = &pdev->dev;
struct resource *res;
void __iomem *base;
struct drm_driver *driver = &fsl_dcu_drm_driver;
const struct of_device_id *id;
int ret;
fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
if (!fsl_dev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "could not get memory IO resource\n");
return -ENODEV;
}
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base)) {
ret = PTR_ERR(base);
return ret;
}
fsl_dev->irq = platform_get_irq(pdev, 0);
if (fsl_dev->irq < 0) {
dev_err(dev, "failed to get irq\n");
return -ENXIO;
}
fsl_dev->clk = devm_clk_get(dev, "dcu");
if (IS_ERR(fsl_dev->clk)) {
ret = PTR_ERR(fsl_dev->clk);
dev_err(dev, "failed to get dcu clock\n");
return ret;
}
ret = clk_prepare(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to prepare dcu clk\n");
return ret;
}
ret = clk_enable(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to enable dcu clk\n");
clk_unprepare(fsl_dev->clk);
return ret;
}
fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
&fsl_dcu_regmap_config);
if (IS_ERR(fsl_dev->regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(fsl_dev->regmap);
}
id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
if (!id)
return -ENODEV;
fsl_dev->soc = id->data;
drm = drm_dev_alloc(driver, dev);
if (!drm)
return -ENOMEM;
fsl_dev->dev = dev;
fsl_dev->drm = drm;
fsl_dev->np = dev->of_node;
drm->dev_private = fsl_dev;
dev_set_drvdata(dev, fsl_dev);
drm_dev_set_unique(drm, dev_name(dev));
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto unref;
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
driver->major, driver->minor, driver->patchlevel,
driver->date, drm->primary->index);
return 0;
unref:
drm_dev_unref(drm);
return ret;
}
static int fsl_dcu_drm_remove(struct platform_device *pdev)
{
struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
drm_put_dev(fsl_dev->drm);
return 0;
}
static struct platform_driver fsl_dcu_drm_platform_driver = {
.probe = fsl_dcu_drm_probe,
.remove = fsl_dcu_drm_remove,
.driver = {
.name = "fsl-dcu",
.pm = &fsl_dcu_drm_pm_ops,
.of_match_table = fsl_dcu_of_match,
},
};
module_platform_driver(fsl_dcu_drm_platform_driver);
MODULE_DESCRIPTION("Freescale DCU DRM Driver");
MODULE_LICENSE("GPL");