blob: acf3a36c9ebc453737b1a849aa6715f41b241d68 [file] [log] [blame]
/*
* Copyright (C) 2012 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_gem.h"
#include "armada_hw.h"
#include <drm/armada_drm.h>
#include "armada_ioctlP.h"
#ifdef CONFIG_DRM_ARMADA_TDA1998X
#include <drm/i2c/tda998x.h>
#include "armada_slave.h"
static struct tda998x_encoder_params params = {
/* With 0x24, there is no translation between vp_out and int_vp
FB LCD out Pins VIP Int Vp
R:23:16 R:7:0 VPC7:0 7:0 7:0[R]
G:15:8 G:15:8 VPB7:0 23:16 23:16[G]
B:7:0 B:23:16 VPA7:0 15:8 15:8[B]
*/
.swap_a = 2,
.swap_b = 3,
.swap_c = 4,
.swap_d = 5,
.swap_e = 0,
.swap_f = 1,
.audio_cfg = BIT(2),
.audio_frame[1] = 1,
.audio_format = AFMT_SPDIF,
.audio_sample_rate = 44100,
};
static const struct armada_drm_slave_config tda19988_config = {
.i2c_adapter_id = 0,
.crtcs = 1 << 0, /* Only LCD0 at the moment */
.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
.interlace_allowed = true,
.info = {
.type = "tda998x",
.addr = 0x70,
.platform_data = &params,
},
};
#endif
static void armada_drm_unref_work(struct work_struct *work)
{
struct armada_private *priv =
container_of(work, struct armada_private, fb_unref_work);
struct drm_framebuffer *fb;
while (kfifo_get(&priv->fb_unref, &fb))
drm_framebuffer_unreference(fb);
}
/* Must be called with dev->event_lock held */
void __armada_drm_queue_unref_work(struct drm_device *dev,
struct drm_framebuffer *fb)
{
struct armada_private *priv = dev->dev_private;
/*
* Yes, we really must jump through these hoops just to store a
* _pointer_ to something into the kfifo. This is utterly insane
* and idiotic, because it kfifo requires the _data_ pointed to by
* the pointer const, not the pointer itself. Not only that, but
* you have to pass a pointer _to_ the pointer you want stored.
*/
const struct drm_framebuffer *silly_api_alert = fb;
WARN_ON(!kfifo_put(&priv->fb_unref, &silly_api_alert));
schedule_work(&priv->fb_unref_work);
}
void armada_drm_queue_unref_work(struct drm_device *dev,
struct drm_framebuffer *fb)
{
unsigned long flags;
spin_lock_irqsave(&dev->event_lock, flags);
__armada_drm_queue_unref_work(dev, fb);
spin_unlock_irqrestore(&dev->event_lock, flags);
}
static int armada_drm_load(struct drm_device *dev, unsigned long flags)
{
const struct platform_device_id *id;
struct armada_private *priv;
struct resource *res[ARRAY_SIZE(priv->dcrtc)];
struct resource *mem = NULL;
int ret, n, i;
memset(res, 0, sizeof(res));
for (n = i = 0; ; n++) {
struct resource *r = platform_get_resource(dev->platformdev,
IORESOURCE_MEM, n);
if (!r)
break;
/* Resources above 64K are graphics memory */
if (resource_size(r) > SZ_64K)
mem = r;
else if (i < ARRAY_SIZE(priv->dcrtc))
res[i++] = r;
else
return -EINVAL;
}
if (!res[0] || !mem)
return -ENXIO;
if (!devm_request_mem_region(dev->dev, mem->start,
resource_size(mem), "armada-drm"))
return -EBUSY;
priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv) {
DRM_ERROR("failed to allocate private\n");
return -ENOMEM;
}
platform_set_drvdata(dev->platformdev, dev);
dev->dev_private = priv;
/* Get the implementation specific driver data. */
id = platform_get_device_id(dev->platformdev);
if (!id)
return -ENXIO;
priv->variant = (struct armada_variant *)id->driver_data;
ret = priv->variant->init(priv, dev->dev);
if (ret)
return ret;
INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
INIT_KFIFO(priv->fb_unref);
/* Mode setting support */
drm_mode_config_init(dev);
dev->mode_config.min_width = 320;
dev->mode_config.min_height = 200;
/*
* With vscale enabled, the maximum width is 1920 due to the
* 1920 by 3 lines RAM
*/
dev->mode_config.max_width = 1920;
dev->mode_config.max_height = 2048;
dev->mode_config.preferred_depth = 24;
dev->mode_config.funcs = &armada_drm_mode_config_funcs;
drm_mm_init(&priv->linear, mem->start, resource_size(mem));
/* Create all LCD controllers */
for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
if (!res[n])
break;
ret = armada_drm_crtc_create(dev, n, res[n]);
if (ret)
goto err_kms;
}
#ifdef CONFIG_DRM_ARMADA_TDA1998X
ret = armada_drm_connector_slave_create(dev, &tda19988_config);
if (ret)
goto err_kms;
#endif
ret = drm_vblank_init(dev, n);
if (ret)
goto err_kms;
ret = drm_irq_install(dev);
if (ret)
goto err_kms;
dev->vblank_disable_allowed = 1;
ret = armada_fbdev_init(dev);
if (ret)
goto err_irq;
drm_kms_helper_poll_init(dev);
return 0;
err_irq:
drm_irq_uninstall(dev);
err_kms:
drm_mode_config_cleanup(dev);
drm_mm_takedown(&priv->linear);
flush_work(&priv->fb_unref_work);
return ret;
}
static int armada_drm_unload(struct drm_device *dev)
{
struct armada_private *priv = dev->dev_private;
drm_kms_helper_poll_fini(dev);
armada_fbdev_fini(dev);
drm_irq_uninstall(dev);
drm_mode_config_cleanup(dev);
drm_mm_takedown(&priv->linear);
flush_work(&priv->fb_unref_work);
dev->dev_private = NULL;
return 0;
}
void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
struct armada_vbl_event *evt)
{
unsigned long flags;
spin_lock_irqsave(&dcrtc->irq_lock, flags);
if (list_empty(&evt->node)) {
list_add_tail(&evt->node, &dcrtc->vbl_list);
drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
}
spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
}
void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
struct armada_vbl_event *evt)
{
if (!list_empty(&evt->node)) {
list_del_init(&evt->node);
drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
}
}
void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
struct armada_vbl_event *evt)
{
unsigned long flags;
spin_lock_irqsave(&dcrtc->irq_lock, flags);
armada_drm_vbl_event_remove(dcrtc, evt);
spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
}
/* These are called under the vbl_lock. */
static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
{
struct armada_private *priv = dev->dev_private;
armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
return 0;
}
static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
{
struct armada_private *priv = dev->dev_private;
armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
}
static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
{
struct drm_device *dev = arg;
struct armada_private *priv = dev->dev_private;
struct armada_crtc *dcrtc = priv->dcrtc[0];
uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
irqreturn_t handled = IRQ_NONE;
/*
* This is rediculous - rather than writing bits to clear, we
* have to set the actual status register value. This is racy.
*/
writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
/* Mask out those interrupts we haven't enabled */
v = stat & dcrtc->irq_ena;
if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
armada_drm_crtc_irq(dcrtc, stat);
handled = IRQ_HANDLED;
}
return handled;
}
static int armada_drm_irq_postinstall(struct drm_device *dev)
{
struct armada_private *priv = dev->dev_private;
struct armada_crtc *dcrtc = priv->dcrtc[0];
spin_lock_irq(&dev->vbl_lock);
writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
spin_unlock_irq(&dev->vbl_lock);
return 0;
}
static void armada_drm_irq_uninstall(struct drm_device *dev)
{
struct armada_private *priv = dev->dev_private;
struct armada_crtc *dcrtc = priv->dcrtc[0];
writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
}
static struct drm_ioctl_desc armada_ioctls[] = {
DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
DRM_UNLOCKED),
};
static void armada_drm_lastclose(struct drm_device *dev)
{
armada_fbdev_lastclose(dev);
}
static const struct file_operations armada_drm_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.read = drm_read,
.poll = drm_poll,
.unlocked_ioctl = drm_ioctl,
.mmap = drm_gem_mmap,
.open = drm_open,
.release = drm_release,
};
static struct drm_driver armada_drm_driver = {
.load = armada_drm_load,
.open = NULL,
.preclose = NULL,
.postclose = NULL,
.lastclose = armada_drm_lastclose,
.unload = armada_drm_unload,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = armada_drm_enable_vblank,
.disable_vblank = armada_drm_disable_vblank,
.irq_handler = armada_drm_irq_handler,
.irq_postinstall = armada_drm_irq_postinstall,
.irq_uninstall = armada_drm_irq_uninstall,
#ifdef CONFIG_DEBUG_FS
.debugfs_init = armada_drm_debugfs_init,
.debugfs_cleanup = armada_drm_debugfs_cleanup,
#endif
.gem_free_object = armada_gem_free_object,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = armada_gem_prime_export,
.gem_prime_import = armada_gem_prime_import,
.dumb_create = armada_gem_dumb_create,
.dumb_map_offset = armada_gem_dumb_map_offset,
.dumb_destroy = armada_gem_dumb_destroy,
.gem_vm_ops = &armada_gem_vm_ops,
.major = 1,
.minor = 0,
.name = "armada-drm",
.desc = "Armada SoC DRM",
.date = "20120730",
.driver_features = DRIVER_GEM | DRIVER_MODESET |
DRIVER_HAVE_IRQ | DRIVER_PRIME,
.ioctls = armada_ioctls,
.fops = &armada_drm_fops,
};
static int armada_drm_probe(struct platform_device *pdev)
{
return drm_platform_init(&armada_drm_driver, pdev);
}
static int armada_drm_remove(struct platform_device *pdev)
{
drm_put_dev(platform_get_drvdata(pdev));
return 0;
}
static const struct platform_device_id armada_drm_platform_ids[] = {
{
.name = "armada-drm",
.driver_data = (unsigned long)&armada510_ops,
}, {
.name = "armada-510-drm",
.driver_data = (unsigned long)&armada510_ops,
},
{ },
};
MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
static struct platform_driver armada_drm_platform_driver = {
.probe = armada_drm_probe,
.remove = armada_drm_remove,
.driver = {
.name = "armada-drm",
.owner = THIS_MODULE,
},
.id_table = armada_drm_platform_ids,
};
static int __init armada_drm_init(void)
{
armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls);
return platform_driver_register(&armada_drm_platform_driver);
}
module_init(armada_drm_init);
static void __exit armada_drm_exit(void)
{
platform_driver_unregister(&armada_drm_platform_driver);
}
module_exit(armada_drm_exit);
MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
MODULE_DESCRIPTION("Armada DRM Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:armada-drm");