362 lines
9.1 KiB
C
362 lines
9.1 KiB
C
![]() |
/*
|
||
|
* 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 __devinit 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 __devinit 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 = 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)
|
||
|
{
|
||
|
struct shmob_drm_device *sdev = dev->dev_private;
|
||
|
|
||
|
drm_kms_helper_poll_fini(dev);
|
||
|
drm_mode_config_cleanup(dev);
|
||
|
drm_vblank_cleanup(dev);
|
||
|
drm_irq_uninstall(dev);
|
||
|
|
||
|
if (sdev->clock)
|
||
|
clk_put(sdev->clock);
|
||
|
|
||
|
if (sdev->mmio)
|
||
|
iounmap(sdev->mmio);
|
||
|
|
||
|
dev->dev_private = NULL;
|
||
|
kfree(sdev);
|
||
|
|
||
|
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 = kzalloc(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");
|
||
|
ret = -EINVAL;
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
sdev->mmio = ioremap_nocache(res->start, resource_size(res));
|
||
|
if (sdev->mmio == NULL) {
|
||
|
dev_err(&pdev->dev, "failed to remap memory resource\n");
|
||
|
ret = -ENOMEM;
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
|
||
|
if (ret < 0)
|
||
|
goto done;
|
||
|
|
||
|
ret = shmob_drm_init_interface(sdev);
|
||
|
if (ret < 0)
|
||
|
goto done;
|
||
|
|
||
|
ret = shmob_drm_modeset_init(sdev);
|
||
|
if (ret < 0) {
|
||
|
dev_err(&pdev->dev, "failed to initialize mode setting\n");
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
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);
|
||
|
if (ret < 0) {
|
||
|
dev_err(&pdev->dev, "failed to install IRQ handler\n");
|
||
|
goto done;
|
||
|
}
|
||
|
|
||
|
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,
|
||
|
.fasync = drm_fasync,
|
||
|
.llseek = no_llseek,
|
||
|
.mmap = drm_gem_cma_mmap,
|
||
|
};
|
||
|
|
||
|
static struct drm_driver shmob_drm_driver = {
|
||
|
.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
|
||
|
.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,
|
||
|
.dumb_create = drm_gem_cma_dumb_create,
|
||
|
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
|
||
|
.dumb_destroy = drm_gem_cma_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 platform_device *pdev = to_platform_device(dev);
|
||
|
struct drm_device *ddev = platform_get_drvdata(pdev);
|
||
|
struct shmob_drm_device *sdev = ddev->dev_private;
|
||
|
|
||
|
drm_kms_helper_poll_disable(ddev);
|
||
|
shmob_drm_crtc_suspend(&sdev->crtc);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int shmob_drm_pm_resume(struct device *dev)
|
||
|
{
|
||
|
struct platform_device *pdev = to_platform_device(dev);
|
||
|
struct drm_device *ddev = platform_get_drvdata(pdev);
|
||
|
struct shmob_drm_device *sdev = ddev->dev_private;
|
||
|
|
||
|
mutex_lock(&sdev->ddev->mode_config.mutex);
|
||
|
shmob_drm_crtc_resume(&sdev->crtc);
|
||
|
mutex_unlock(&sdev->ddev->mode_config.mutex);
|
||
|
|
||
|
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 __devinit shmob_drm_probe(struct platform_device *pdev)
|
||
|
{
|
||
|
return drm_platform_init(&shmob_drm_driver, pdev);
|
||
|
}
|
||
|
|
||
|
static int __devexit shmob_drm_remove(struct platform_device *pdev)
|
||
|
{
|
||
|
drm_platform_exit(&shmob_drm_driver, pdev);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static struct platform_driver shmob_drm_platform_driver = {
|
||
|
.probe = shmob_drm_probe,
|
||
|
.remove = __devexit_p(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");
|