256 lines
6.4 KiB
C
256 lines
6.4 KiB
C
/*
|
|
* ARC PGU DRM driver.
|
|
*
|
|
* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_fb_cma_helper.h>
|
|
#include <drm/drm_gem_cma_helper.h>
|
|
#include <drm/drm_gem_framebuffer_helper.h>
|
|
#include <drm/drm_atomic_helper.h>
|
|
#include <linux/of_reserved_mem.h>
|
|
|
|
#include "arcpgu.h"
|
|
#include "arcpgu_regs.h"
|
|
|
|
static void arcpgu_fb_output_poll_changed(struct drm_device *dev)
|
|
{
|
|
struct arcpgu_drm_private *arcpgu = dev->dev_private;
|
|
|
|
drm_fbdev_cma_hotplug_event(arcpgu->fbdev);
|
|
}
|
|
|
|
static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
|
|
.fb_create = drm_gem_fb_create,
|
|
.output_poll_changed = arcpgu_fb_output_poll_changed,
|
|
.atomic_check = drm_atomic_helper_check,
|
|
.atomic_commit = drm_atomic_helper_commit,
|
|
};
|
|
|
|
static void arcpgu_setup_mode_config(struct drm_device *drm)
|
|
{
|
|
drm_mode_config_init(drm);
|
|
drm->mode_config.min_width = 0;
|
|
drm->mode_config.min_height = 0;
|
|
drm->mode_config.max_width = 1920;
|
|
drm->mode_config.max_height = 1080;
|
|
drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
|
|
}
|
|
|
|
DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);
|
|
|
|
static void arcpgu_lastclose(struct drm_device *drm)
|
|
{
|
|
struct arcpgu_drm_private *arcpgu = drm->dev_private;
|
|
|
|
drm_fbdev_cma_restore_mode(arcpgu->fbdev);
|
|
}
|
|
|
|
static int arcpgu_load(struct drm_device *drm)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(drm->dev);
|
|
struct arcpgu_drm_private *arcpgu;
|
|
struct device_node *encoder_node;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
|
|
if (arcpgu == NULL)
|
|
return -ENOMEM;
|
|
|
|
drm->dev_private = arcpgu;
|
|
|
|
arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
|
|
if (IS_ERR(arcpgu->clk))
|
|
return PTR_ERR(arcpgu->clk);
|
|
|
|
arcpgu_setup_mode_config(drm);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(arcpgu->regs))
|
|
return PTR_ERR(arcpgu->regs);
|
|
|
|
dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
|
|
arc_pgu_read(arcpgu, ARCPGU_REG_ID));
|
|
|
|
/* Get the optional framebuffer memory resource */
|
|
ret = of_reserved_mem_device_init(drm->dev);
|
|
if (ret && ret != -ENODEV)
|
|
return ret;
|
|
|
|
if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
|
|
return -ENODEV;
|
|
|
|
if (arc_pgu_setup_crtc(drm) < 0)
|
|
return -ENODEV;
|
|
|
|
/* find the encoder node and initialize it */
|
|
encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
|
|
if (encoder_node) {
|
|
ret = arcpgu_drm_hdmi_init(drm, encoder_node);
|
|
of_node_put(encoder_node);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
ret = arcpgu_drm_sim_init(drm, NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
drm_mode_config_reset(drm);
|
|
drm_kms_helper_poll_init(drm);
|
|
|
|
arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
|
|
drm->mode_config.num_connector);
|
|
if (IS_ERR(arcpgu->fbdev)) {
|
|
ret = PTR_ERR(arcpgu->fbdev);
|
|
arcpgu->fbdev = NULL;
|
|
return -ENODEV;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, drm);
|
|
return 0;
|
|
}
|
|
|
|
static int arcpgu_unload(struct drm_device *drm)
|
|
{
|
|
struct arcpgu_drm_private *arcpgu = drm->dev_private;
|
|
|
|
if (arcpgu->fbdev) {
|
|
drm_fbdev_cma_fini(arcpgu->fbdev);
|
|
arcpgu->fbdev = NULL;
|
|
}
|
|
drm_kms_helper_poll_fini(drm);
|
|
drm_mode_config_cleanup(drm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static int arcpgu_show_pxlclock(struct seq_file *m, void *arg)
|
|
{
|
|
struct drm_info_node *node = (struct drm_info_node *)m->private;
|
|
struct drm_device *drm = node->minor->dev;
|
|
struct arcpgu_drm_private *arcpgu = drm->dev_private;
|
|
unsigned long clkrate = clk_get_rate(arcpgu->clk);
|
|
unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
|
|
|
|
seq_printf(m, "hw : %lu\n", clkrate);
|
|
seq_printf(m, "mode: %lu\n", mode_clock);
|
|
return 0;
|
|
}
|
|
|
|
static struct drm_info_list arcpgu_debugfs_list[] = {
|
|
{ "clocks", arcpgu_show_pxlclock, 0 },
|
|
};
|
|
|
|
static int arcpgu_debugfs_init(struct drm_minor *minor)
|
|
{
|
|
return drm_debugfs_create_files(arcpgu_debugfs_list,
|
|
ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor);
|
|
}
|
|
#endif
|
|
|
|
static struct drm_driver arcpgu_drm_driver = {
|
|
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
|
|
DRIVER_ATOMIC,
|
|
.lastclose = arcpgu_lastclose,
|
|
.name = "arcpgu",
|
|
.desc = "ARC PGU Controller",
|
|
.date = "20160219",
|
|
.major = 1,
|
|
.minor = 0,
|
|
.patchlevel = 0,
|
|
.fops = &arcpgu_drm_ops,
|
|
.dumb_create = drm_gem_cma_dumb_create,
|
|
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
|
|
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
|
|
.gem_free_object_unlocked = drm_gem_cma_free_object,
|
|
.gem_print_info = drm_gem_cma_print_info,
|
|
.gem_vm_ops = &drm_gem_cma_vm_ops,
|
|
.gem_prime_export = drm_gem_prime_export,
|
|
.gem_prime_import = drm_gem_prime_import,
|
|
.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,
|
|
#ifdef CONFIG_DEBUG_FS
|
|
.debugfs_init = arcpgu_debugfs_init,
|
|
#endif
|
|
};
|
|
|
|
static int arcpgu_probe(struct platform_device *pdev)
|
|
{
|
|
struct drm_device *drm;
|
|
int ret;
|
|
|
|
drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
|
|
if (IS_ERR(drm))
|
|
return PTR_ERR(drm);
|
|
|
|
ret = arcpgu_load(drm);
|
|
if (ret)
|
|
goto err_unref;
|
|
|
|
ret = drm_dev_register(drm, 0);
|
|
if (ret)
|
|
goto err_unload;
|
|
|
|
return 0;
|
|
|
|
err_unload:
|
|
arcpgu_unload(drm);
|
|
|
|
err_unref:
|
|
drm_dev_unref(drm);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int arcpgu_remove(struct platform_device *pdev)
|
|
{
|
|
struct drm_device *drm = platform_get_drvdata(pdev);
|
|
|
|
drm_dev_unregister(drm);
|
|
arcpgu_unload(drm);
|
|
drm_dev_unref(drm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id arcpgu_of_table[] = {
|
|
{.compatible = "snps,arcpgu"},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, arcpgu_of_table);
|
|
|
|
static struct platform_driver arcpgu_platform_driver = {
|
|
.probe = arcpgu_probe,
|
|
.remove = arcpgu_remove,
|
|
.driver = {
|
|
.name = "arcpgu",
|
|
.of_match_table = arcpgu_of_table,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(arcpgu_platform_driver);
|
|
|
|
MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
|
|
MODULE_DESCRIPTION("ARC PGU DRM driver");
|
|
MODULE_LICENSE("GPL");
|