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linux-sg2042/drivers/gpu/drm/shmobile/shmob_drm_drv.c

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/*
* shmob_drm_drv.c -- SH Mobile DRM driver
*
* Copyright (C) 2012 Renesas Corporation
*
* 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 "shmob_drm_crtc.h"
#include "shmob_drm_drv.h"
#include "shmob_drm_kms.h"
#include "shmob_drm_plane.h"
#include "shmob_drm_regs.h"
/* -----------------------------------------------------------------------------
* Hardware initialization
*/
static int shmob_drm_init_interface(struct shmob_drm_device *sdev)
{
static const u32 ldmt1r[] = {
[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
[SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
[SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
[SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
[SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
[SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
[SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
[SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
[SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
[SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
[SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
[SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
};
if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
dev_err(sdev->dev, "invalid interface type %u\n",
sdev->pdata->iface.interface);
return -EINVAL;
}
sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
return 0;
}
static int shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
enum shmob_drm_clk_source clksrc)
{
struct clk *clk;
char *clkname;
switch (clksrc) {
case SHMOB_DRM_CLK_BUS:
clkname = "bus_clk";
sdev->lddckr = LDDCKR_ICKSEL_BUS;
break;
case SHMOB_DRM_CLK_PERIPHERAL:
clkname = "peripheral_clk";
sdev->lddckr = LDDCKR_ICKSEL_MIPI;
break;
case SHMOB_DRM_CLK_EXTERNAL:
clkname = NULL;
sdev->lddckr = LDDCKR_ICKSEL_HDMI;
break;
default:
return -EINVAL;
}
clk = devm_clk_get(sdev->dev, clkname);
if (IS_ERR(clk)) {
dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
return PTR_ERR(clk);
}
sdev->clock = clk;
return 0;
}
/* -----------------------------------------------------------------------------
* DRM operations
*/
static int shmob_drm_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 shmob_drm_load(struct drm_device *dev, unsigned long flags)
{
struct shmob_drm_platform_data *pdata = dev->dev->platform_data;
struct platform_device *pdev = dev->platformdev;
struct shmob_drm_device *sdev;
struct resource *res;
unsigned int i;
int ret;
if (pdata == NULL) {
dev_err(dev->dev, "no platform data\n");
return -EINVAL;
}
sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
if (sdev == NULL) {
dev_err(dev->dev, "failed to allocate private data\n");
return -ENOMEM;
}
sdev->dev = &pdev->dev;
sdev->pdata = pdata;
spin_lock_init(&sdev->irq_lock);
sdev->ddev = dev;
dev->dev_private = sdev;
/* I/O resources and clocks */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "failed to get memory resource\n");
return -EINVAL;
}
sdev->mmio = devm_ioremap_nocache(&pdev->dev, res->start,
resource_size(res));
if (sdev->mmio == NULL) {
dev_err(&pdev->dev, "failed to remap memory resource\n");
return -ENOMEM;
}
ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
if (ret < 0)
return ret;
ret = shmob_drm_init_interface(sdev);
if (ret < 0)
return ret;
ret = shmob_drm_modeset_init(sdev);
if (ret < 0) {
dev_err(&pdev->dev, "failed to initialize mode setting\n");
return ret;
}
for (i = 0; i < 4; ++i) {
ret = shmob_drm_plane_create(sdev, i);
if (ret < 0) {
dev_err(&pdev->dev, "failed to create plane %u\n", i);
goto done;
}
}
ret = drm_vblank_init(dev, 1);
if (ret < 0) {
dev_err(&pdev->dev, "failed to initialize vblank\n");
goto done;
}
ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
if (ret < 0) {
dev_err(&pdev->dev, "failed to install IRQ handler\n");
goto done;
}
platform_set_drvdata(pdev, sdev);
done:
if (ret)
shmob_drm_unload(dev);
return ret;
}
static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file)
{
struct shmob_drm_device *sdev = dev->dev_private;
shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file);
}
static irqreturn_t shmob_drm_irq(int irq, void *arg)
{
struct drm_device *dev = arg;
struct shmob_drm_device *sdev = dev->dev_private;
unsigned long flags;
u32 status;
/* Acknowledge interrupts. Putting interrupt enable and interrupt flag
* bits in the same register is really brain-dead design and requires
* taking a spinlock.
*/
spin_lock_irqsave(&sdev->irq_lock, flags);
status = lcdc_read(sdev, LDINTR);
lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
spin_unlock_irqrestore(&sdev->irq_lock, flags);
if (status & LDINTR_VES) {
drm_handle_vblank(dev, 0);
shmob_drm_crtc_finish_page_flip(&sdev->crtc);
}
return IRQ_HANDLED;
}
static int shmob_drm_enable_vblank(struct drm_device *dev, int crtc)
{
struct shmob_drm_device *sdev = dev->dev_private;
shmob_drm_crtc_enable_vblank(sdev, true);
return 0;
}
static void shmob_drm_disable_vblank(struct drm_device *dev, int crtc)
{
struct shmob_drm_device *sdev = dev->dev_private;
shmob_drm_crtc_enable_vblank(sdev, false);
}
static const struct file_operations shmob_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 shmob_drm_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
| DRIVER_PRIME,
.load = shmob_drm_load,
.unload = shmob_drm_unload,
.preclose = shmob_drm_preclose,
.irq_handler = shmob_drm_irq,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = shmob_drm_enable_vblank,
.disable_vblank = shmob_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 = &shmob_drm_fops,
.name = "shmob-drm",
.desc = "Renesas SH Mobile DRM",
.date = "20120424",
.major = 1,
.minor = 0,
};
/* -----------------------------------------------------------------------------
* Power management
*/
#if CONFIG_PM_SLEEP
static int shmob_drm_pm_suspend(struct device *dev)
{
struct shmob_drm_device *sdev = dev_get_drvdata(dev);
drm_kms_helper_poll_disable(sdev->ddev);
shmob_drm_crtc_suspend(&sdev->crtc);
return 0;
}
static int shmob_drm_pm_resume(struct device *dev)
{
struct shmob_drm_device *sdev = dev_get_drvdata(dev);
drm_modeset_lock_all(sdev->ddev);
shmob_drm_crtc_resume(&sdev->crtc);
drm_modeset_unlock_all(sdev->ddev);
drm_kms_helper_poll_enable(sdev->ddev);
return 0;
}
#endif
static const struct dev_pm_ops shmob_drm_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
};
/* -----------------------------------------------------------------------------
* Platform driver
*/
static int shmob_drm_probe(struct platform_device *pdev)
{
return drm_platform_init(&shmob_drm_driver, pdev);
}
static int shmob_drm_remove(struct platform_device *pdev)
{
struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
drm_put_dev(sdev->ddev);
return 0;
}
static struct platform_driver shmob_drm_platform_driver = {
.probe = shmob_drm_probe,
.remove = shmob_drm_remove,
.driver = {
.owner = THIS_MODULE,
.name = "shmob-drm",
.pm = &shmob_drm_pm_ops,
},
};
module_platform_driver(shmob_drm_platform_driver);
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
MODULE_LICENSE("GPL");
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