#include <linux/clk.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <drm/clients/drm_client_setup.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_dma.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_modeset_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"
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 = "fck";
sdev->lddckr = LDDCKR_ICKSEL_BUS;
break;
case SHMOB_DRM_CLK_PERIPHERAL:
clkname = "media";
sdev->lddckr = LDDCKR_ICKSEL_MIPI;
break;
case SHMOB_DRM_CLK_EXTERNAL:
clkname = "lclk";
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;
}
static irqreturn_t shmob_drm_irq(int irq, void *arg)
{
struct drm_device *dev = arg;
struct shmob_drm_device *sdev = to_shmob_device(dev);
unsigned long flags;
u32 status;
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_crtc_handle_vblank(&sdev->crtc.base);
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 | DRIVER_ATOMIC,
DRM_GEM_DMA_DRIVER_OPS,
DRM_FBDEV_DMA_DRIVER_OPS,
.fops = &shmob_drm_fops,
.name = "shmob-drm",
.desc = "Renesas SH Mobile DRM",
.major = 1,
.minor = 0,
};
static int shmob_drm_pm_suspend(struct device *dev)
{
struct shmob_drm_device *sdev = dev_get_drvdata(dev);
return drm_mode_config_helper_suspend(&sdev->ddev);
}
static int shmob_drm_pm_resume(struct device *dev)
{
struct shmob_drm_device *sdev = dev_get_drvdata(dev);
return drm_mode_config_helper_resume(&sdev->ddev);
}
static int shmob_drm_pm_runtime_suspend(struct device *dev)
{
struct shmob_drm_device *sdev = dev_get_drvdata(dev);
if (sdev->clock)
clk_disable_unprepare(sdev->clock);
return 0;
}
static int shmob_drm_pm_runtime_resume(struct device *dev)
{
struct shmob_drm_device *sdev = dev_get_drvdata(dev);
int ret;
if (sdev->clock) {
ret = clk_prepare_enable(sdev->clock);
if (ret < 0)
return ret;
}
return 0;
}
static const struct dev_pm_ops shmob_drm_pm_ops = {
SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
RUNTIME_PM_OPS(shmob_drm_pm_runtime_suspend,
shmob_drm_pm_runtime_resume, NULL)
};
static void 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_atomic_helper_shutdown(ddev);
drm_kms_helper_poll_fini(ddev);
}
static void shmob_drm_shutdown(struct platform_device *pdev)
{
struct shmob_drm_device *sdev = platform_get_drvdata(pdev);
drm_atomic_helper_shutdown(&sdev->ddev);
}
static int shmob_drm_probe(struct platform_device *pdev)
{
struct shmob_drm_platform_data *pdata = pdev->dev.platform_data;
const struct shmob_drm_config *config;
struct shmob_drm_device *sdev;
struct drm_device *ddev;
int ret;
config = of_device_get_match_data(&pdev->dev);
if (!config && !pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
sdev = devm_drm_dev_alloc(&pdev->dev, &shmob_drm_driver,
struct shmob_drm_device, ddev);
if (IS_ERR(sdev))
return PTR_ERR(sdev);
ddev = &sdev->ddev;
sdev->dev = &pdev->dev;
if (config) {
sdev->config = *config;
} else {
sdev->pdata = pdata;
sdev->config.clk_source = pdata->clk_source;
sdev->config.clk_div = pdata->iface.clk_div;
}
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, sdev->config.clk_source);
if (ret < 0)
return ret;
ret = devm_pm_runtime_enable(&pdev->dev);
if (ret)
return ret;
ret = drm_vblank_init(ddev, 1);
if (ret < 0) {
dev_err(&pdev->dev, "failed to initialize vblank\n");
return ret;
}
ret = shmob_drm_modeset_init(sdev);
if (ret < 0)
return dev_err_probe(&pdev->dev, ret,
"failed to initialize mode setting\n");
ret = platform_get_irq(pdev, 0);
if (ret < 0)
goto err_modeset_cleanup;
sdev->irq = ret;
ret = devm_request_irq(&pdev->dev, 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;
}
ret = drm_dev_register(ddev, 0);
if (ret < 0)
goto err_modeset_cleanup;
drm_client_setup_with_fourcc(ddev, DRM_FORMAT_RGB565);
return 0;
err_modeset_cleanup:
drm_kms_helper_poll_fini(ddev);
return ret;
}
static const struct shmob_drm_config shmob_arm_config = {
.clk_source = SHMOB_DRM_CLK_BUS,
.clk_div = 5,
};
static const struct of_device_id shmob_drm_of_table[] __maybe_unused = {
{ .compatible = "renesas,r8a7740-lcdc", .data = &shmob_arm_config, },
{ .compatible = "renesas,sh73a0-lcdc", .data = &shmob_arm_config, },
{ }
};
static struct platform_driver shmob_drm_platform_driver = {
.probe = shmob_drm_probe,
.remove = shmob_drm_remove,
.shutdown = shmob_drm_shutdown,
.driver = {
.name = "shmob-drm",
.of_match_table = of_match_ptr(shmob_drm_of_table),
.pm = &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");
