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linux-next/drivers/gpu/drm/arc/arcpgu_drv.c
Jose Abreu a8f8fb2057 drm: arcpgu: Fix mmap() callback
Now that ARC properly supports DMA mmap() we can use the standard
CMA helper to map dumb buffers. This makes ARC PGU works with
standard DRM consumer applications like, for example, mpv/mplayer
via DRM. While at it, use the DEFINE_DRM_GEM_CMA_FOPS() helper.

This fixes the use of dumb buffers.

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Fixes: 0c4250e7b1 ("drm: Add support of ARC PGU display controller")
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2017-08-03 00:11:01 +03:00

257 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_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 struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
.fb_create = drm_fb_cma_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, arcpgu);
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 },
{ "fb", drm_fb_cma_debugfs_show, 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,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.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_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");