303 lines
7.4 KiB
C
303 lines
7.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* shmob_drm_drv.c -- SH Mobile DRM driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 Renesas Electronics Corporation
|
||
|
|
*
|
||
|
|
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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/drm_drv.h>
|
||
|
|
#include <drm/drm_fbdev_generic.h>
|
||
|
|
#include <drm/drm_gem_dma_helper.h>
|
||
|
|
#include <drm/drm_module.h>
|
||
|
|
#include <drm/drm_probe_helper.h>
|
||
|
|
#include <drm/drm_vblank.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 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
DEFINE_DRM_GEM_DMA_FOPS(shmob_drm_fops);
|
||
|
|
|
||
|
|
static const struct drm_driver shmob_drm_driver = {
|
||
|
|
.driver_features = DRIVER_GEM | DRIVER_MODESET,
|
||
|
|
DRM_GEM_DMA_DRIVER_OPS,
|
||
|
|
.fops = &shmob_drm_fops,
|
||
|
|
.name = "shmob-drm",
|
||
|
|
.desc = "Renesas SH Mobile DRM",
|
||
|
|
.date = "20120424",
|
||
|
|
.major = 1,
|
||
|
|
.minor = 0,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* -----------------------------------------------------------------------------
|
||
|
|
* Power management
|
||
|
|
*/
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
static DEFINE_SIMPLE_DEV_PM_OPS(shmob_drm_pm_ops,
|
||
|
|
shmob_drm_pm_suspend, shmob_drm_pm_resume);
|
||
|
|
|
||
|
|
/* -----------------------------------------------------------------------------
|
||
|
|
* Platform driver
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int shmob_drm_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
|
||
|
|
struct drm_device *ddev = sdev->ddev;
|
||
|
|
|
||
|
|
drm_dev_unregister(ddev);
|
||
|
|
drm_kms_helper_poll_fini(ddev);
|
||
|
|
free_irq(sdev->irq, ddev);
|
||
|
|
drm_dev_put(ddev);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int shmob_drm_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
|
||
|
|
struct shmob_drm_device *sdev;
|
||
|
|
struct drm_device *ddev;
|
||
|
|
unsigned int i;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (pdata == NULL) {
|
||
|
|
dev_err(&pdev->dev, "no platform data\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Allocate and initialize the driver private data, I/O resources and
|
||
|
|
* clocks.
|
||
|
|
*/
|
||
|
|
sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
|
||
|
|
if (sdev == NULL)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
sdev->dev = &pdev->dev;
|
||
|
|
sdev->pdata = pdata;
|
||
|
|
spin_lock_init(&sdev->irq_lock);
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, sdev);
|
||
|
|
|
||
|
|
sdev->mmio = devm_platform_ioremap_resource(pdev, 0);
|
||
|
|
if (IS_ERR(sdev->mmio))
|
||
|
|
return PTR_ERR(sdev->mmio);
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
/* Allocate and initialize the DRM device. */
|
||
|
|
ddev = drm_dev_alloc(&shmob_drm_driver, &pdev->dev);
|
||
|
|
if (IS_ERR(ddev))
|
||
|
|
return PTR_ERR(ddev);
|
||
|
|
|
||
|
|
sdev->ddev = ddev;
|
||
|
|
ddev->dev_private = sdev;
|
||
|
|
|
||
|
|
ret = shmob_drm_modeset_init(sdev);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(&pdev->dev, "failed to initialize mode setting\n");
|
||
|
|
goto err_free_drm_dev;
|
||
|
|
}
|
||
|
|
|
||
|
|
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 err_modeset_cleanup;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = drm_vblank_init(ddev, 1);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(&pdev->dev, "failed to initialize vblank\n");
|
||
|
|
goto err_modeset_cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = platform_get_irq(pdev, 0);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err_modeset_cleanup;
|
||
|
|
sdev->irq = ret;
|
||
|
|
|
||
|
|
ret = request_irq(sdev->irq, shmob_drm_irq, 0, ddev->driver->name,
|
||
|
|
ddev);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(&pdev->dev, "failed to install IRQ handler\n");
|
||
|
|
goto err_modeset_cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Register the DRM device with the core and the connectors with
|
||
|
|
* sysfs.
|
||
|
|
*/
|
||
|
|
ret = drm_dev_register(ddev, 0);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err_irq_uninstall;
|
||
|
|
|
||
|
|
drm_fbdev_generic_setup(ddev, 16);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_irq_uninstall:
|
||
|
|
free_irq(sdev->irq, ddev);
|
||
|
|
err_modeset_cleanup:
|
||
|
|
drm_kms_helper_poll_fini(ddev);
|
||
|
|
err_free_drm_dev:
|
||
|
|
drm_dev_put(ddev);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver shmob_drm_platform_driver = {
|
||
|
|
.probe = shmob_drm_probe,
|
||
|
|
.remove = shmob_drm_remove,
|
||
|
|
.driver = {
|
||
|
|
.name = "shmob-drm",
|
||
|
|
.pm = pm_sleep_ptr(&shmob_drm_pm_ops),
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
drm_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");
|