blob: dc0fe09b2ba10d8b39f51e29a9340818f8c253ff [file] [log] [blame]
/*
* rcar_du_drv.c -- R-Car Display Unit DRM driver
*
* Copyright (C) 2013 Renesas Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* 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/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_regs.h"
/* -----------------------------------------------------------------------------
* Core device operations
*/
/*
* rcar_du_get - Acquire a reference to the DU
*
* Acquiring a reference enables the device clock and setup core registers. A
* reference must be held before accessing any hardware registers.
*
* This function must be called with the DRM mode_config lock held.
*
* Return 0 in case of success or a negative error code otherwise.
*/
int rcar_du_get(struct rcar_du_device *rcdu)
{
int ret;
if (rcdu->use_count)
goto done;
/* Enable clocks before accessing the hardware. */
ret = clk_prepare_enable(rcdu->clock);
if (ret < 0)
return ret;
/* Enable extended features */
rcar_du_write(rcdu, DEFR, DEFR_CODE | DEFR_DEFE);
rcar_du_write(rcdu, DEFR2, DEFR2_CODE | DEFR2_DEFE2G);
rcar_du_write(rcdu, DEFR3, DEFR3_CODE | DEFR3_DEFE3);
rcar_du_write(rcdu, DEFR4, DEFR4_CODE);
rcar_du_write(rcdu, DEFR5, DEFR5_CODE | DEFR5_DEFE5);
/* Use DS1PR and DS2PR to configure planes priorities and connects the
* superposition 0 to DU0 pins. DU1 pins will be configured dynamically.
*/
rcar_du_write(rcdu, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS);
done:
rcdu->use_count++;
return 0;
}
/*
* rcar_du_put - Release a reference to the DU
*
* Releasing the last reference disables the device clock.
*
* This function must be called with the DRM mode_config lock held.
*/
void rcar_du_put(struct rcar_du_device *rcdu)
{
if (--rcdu->use_count)
return;
clk_disable_unprepare(rcdu->clock);
}
/* -----------------------------------------------------------------------------
* DRM operations
*/
static int rcar_du_unload(struct drm_device *dev)
{
drm_kms_helper_poll_fini(dev);
drm_mode_config_cleanup(dev);
drm_vblank_cleanup(dev);
drm_irq_uninstall(dev);
dev->dev_private = NULL;
return 0;
}
static int rcar_du_load(struct drm_device *dev, unsigned long flags)
{
struct platform_device *pdev = dev->platformdev;
struct rcar_du_platform_data *pdata = pdev->dev.platform_data;
struct rcar_du_device *rcdu;
struct resource *ioarea;
struct resource *mem;
int ret;
if (pdata == NULL) {
dev_err(dev->dev, "no platform data\n");
return -ENODEV;
}
rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
if (rcdu == NULL) {
dev_err(dev->dev, "failed to allocate private data\n");
return -ENOMEM;
}
rcdu->dev = &pdev->dev;
rcdu->pdata = pdata;
rcdu->ddev = dev;
dev->dev_private = rcdu;
/* I/O resources and clocks */
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (mem == NULL) {
dev_err(&pdev->dev, "failed to get memory resource\n");
return -EINVAL;
}
ioarea = devm_request_mem_region(&pdev->dev, mem->start,
resource_size(mem), pdev->name);
if (ioarea == NULL) {
dev_err(&pdev->dev, "failed to request memory region\n");
return -EBUSY;
}
rcdu->mmio = devm_ioremap_nocache(&pdev->dev, ioarea->start,
resource_size(ioarea));
if (rcdu->mmio == NULL) {
dev_err(&pdev->dev, "failed to remap memory resource\n");
return -ENOMEM;
}
rcdu->clock = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(rcdu->clock)) {
dev_err(&pdev->dev, "failed to get clock\n");
return -ENOENT;
}
/* DRM/KMS objects */
ret = rcar_du_modeset_init(rcdu);
if (ret < 0) {
dev_err(&pdev->dev, "failed to initialize DRM/KMS\n");
goto done;
}
/* IRQ and vblank handling */
ret = drm_vblank_init(dev, (1 << rcdu->num_crtcs) - 1);
if (ret < 0) {
dev_err(&pdev->dev, "failed to initialize vblank\n");
goto done;
}
ret = drm_irq_install(dev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to install IRQ handler\n");
goto done;
}
platform_set_drvdata(pdev, rcdu);
done:
if (ret)
rcar_du_unload(dev);
return ret;
}
static void rcar_du_preclose(struct drm_device *dev, struct drm_file *file)
{
struct rcar_du_device *rcdu = dev->dev_private;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(rcdu->crtcs); ++i)
rcar_du_crtc_cancel_page_flip(&rcdu->crtcs[i], file);
}
static irqreturn_t rcar_du_irq(int irq, void *arg)
{
struct drm_device *dev = arg;
struct rcar_du_device *rcdu = dev->dev_private;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(rcdu->crtcs); ++i)
rcar_du_crtc_irq(&rcdu->crtcs[i]);
return IRQ_HANDLED;
}
static int rcar_du_enable_vblank(struct drm_device *dev, int crtc)
{
struct rcar_du_device *rcdu = dev->dev_private;
rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], true);
return 0;
}
static void rcar_du_disable_vblank(struct drm_device *dev, int crtc)
{
struct rcar_du_device *rcdu = dev->dev_private;
rcar_du_crtc_enable_vblank(&rcdu->crtcs[crtc], false);
}
static const struct file_operations rcar_du_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,
.fasync = drm_fasync,
.llseek = no_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct drm_driver rcar_du_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
| DRIVER_PRIME,
.load = rcar_du_load,
.unload = rcar_du_unload,
.preclose = rcar_du_preclose,
.irq_handler = rcar_du_irq,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = rcar_du_enable_vblank,
.disable_vblank = rcar_du_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 = rcar_du_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_cma_dumb_destroy,
.fops = &rcar_du_fops,
.name = "rcar-du",
.desc = "Renesas R-Car Display Unit",
.date = "20130110",
.major = 1,
.minor = 0,
};
/* -----------------------------------------------------------------------------
* Power management
*/
#if CONFIG_PM_SLEEP
static int rcar_du_pm_suspend(struct device *dev)
{
struct rcar_du_device *rcdu = dev_get_drvdata(dev);
drm_kms_helper_poll_disable(rcdu->ddev);
/* TODO Suspend the CRTC */
return 0;
}
static int rcar_du_pm_resume(struct device *dev)
{
struct rcar_du_device *rcdu = dev_get_drvdata(dev);
/* TODO Resume the CRTC */
drm_kms_helper_poll_enable(rcdu->ddev);
return 0;
}
#endif
static const struct dev_pm_ops rcar_du_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
};
/* -----------------------------------------------------------------------------
* Platform driver
*/
static int rcar_du_probe(struct platform_device *pdev)
{
return drm_platform_init(&rcar_du_driver, pdev);
}
static int rcar_du_remove(struct platform_device *pdev)
{
drm_platform_exit(&rcar_du_driver, pdev);
return 0;
}
static struct platform_driver rcar_du_platform_driver = {
.probe = rcar_du_probe,
.remove = rcar_du_remove,
.driver = {
.owner = THIS_MODULE,
.name = "rcar-du",
.pm = &rcar_du_pm_ops,
},
};
module_platform_driver(rcar_du_platform_driver);
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
MODULE_LICENSE("GPL");