blob: 82171d223f2d4f469ebfeac54aeba04cab4b015a [file] [log] [blame]
/*
* (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
* Author: Liviu Dudau <Liviu.Dudau@arm.com>
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* ARM Mali DP500/DP550/DP650 KMS/DRM driver
*/
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/of_reserved_mem.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_of.h>
#include "malidp_drv.h"
#include "malidp_regs.h"
#include "malidp_hw.h"
#define MALIDP_CONF_VALID_TIMEOUT 250
/*
* set the "config valid" bit and wait until the hardware acts on it
*/
static int malidp_set_and_wait_config_valid(struct drm_device *drm)
{
struct malidp_drm *malidp = drm->dev_private;
struct malidp_hw_device *hwdev = malidp->dev;
int ret;
hwdev->set_config_valid(hwdev);
/* don't wait for config_valid flag if we are in config mode */
if (hwdev->in_config_mode(hwdev))
return 0;
ret = wait_event_interruptible_timeout(malidp->wq,
atomic_read(&malidp->config_valid) == 1,
msecs_to_jiffies(MALIDP_CONF_VALID_TIMEOUT));
return (ret > 0) ? 0 : -ETIMEDOUT;
}
static void malidp_output_poll_changed(struct drm_device *drm)
{
struct malidp_drm *malidp = drm->dev_private;
drm_fbdev_cma_hotplug_event(malidp->fbdev);
}
static void malidp_atomic_commit_hw_done(struct drm_atomic_state *state)
{
struct drm_pending_vblank_event *event;
struct drm_device *drm = state->dev;
struct malidp_drm *malidp = drm->dev_private;
int ret = malidp_set_and_wait_config_valid(drm);
if (ret)
DRM_DEBUG_DRIVER("timed out waiting for updated configuration\n");
event = malidp->crtc.state->event;
if (event) {
malidp->crtc.state->event = NULL;
spin_lock_irq(&drm->event_lock);
if (drm_crtc_vblank_get(&malidp->crtc) == 0)
drm_crtc_arm_vblank_event(&malidp->crtc, event);
else
drm_crtc_send_vblank_event(&malidp->crtc, event);
spin_unlock_irq(&drm->event_lock);
}
drm_atomic_helper_commit_hw_done(state);
}
static void malidp_atomic_commit_tail(struct drm_atomic_state *state)
{
struct drm_device *drm = state->dev;
drm_atomic_helper_commit_modeset_disables(drm, state);
drm_atomic_helper_commit_modeset_enables(drm, state);
drm_atomic_helper_commit_planes(drm, state, true);
malidp_atomic_commit_hw_done(state);
drm_atomic_helper_wait_for_vblanks(drm, state);
drm_atomic_helper_cleanup_planes(drm, state);
}
static struct drm_mode_config_helper_funcs malidp_mode_config_helpers = {
.atomic_commit_tail = malidp_atomic_commit_tail,
};
static const struct drm_mode_config_funcs malidp_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
.output_poll_changed = malidp_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static int malidp_enable_vblank(struct drm_device *drm, unsigned int crtc)
{
struct malidp_drm *malidp = drm->dev_private;
struct malidp_hw_device *hwdev = malidp->dev;
malidp_hw_enable_irq(hwdev, MALIDP_DE_BLOCK,
hwdev->map.de_irq_map.vsync_irq);
return 0;
}
static void malidp_disable_vblank(struct drm_device *drm, unsigned int pipe)
{
struct malidp_drm *malidp = drm->dev_private;
struct malidp_hw_device *hwdev = malidp->dev;
malidp_hw_disable_irq(hwdev, MALIDP_DE_BLOCK,
hwdev->map.de_irq_map.vsync_irq);
}
static int malidp_init(struct drm_device *drm)
{
int ret;
struct malidp_drm *malidp = drm->dev_private;
struct malidp_hw_device *hwdev = malidp->dev;
drm_mode_config_init(drm);
drm->mode_config.min_width = hwdev->min_line_size;
drm->mode_config.min_height = hwdev->min_line_size;
drm->mode_config.max_width = hwdev->max_line_size;
drm->mode_config.max_height = hwdev->max_line_size;
drm->mode_config.funcs = &malidp_mode_config_funcs;
drm->mode_config.helper_private = &malidp_mode_config_helpers;
ret = malidp_crtc_init(drm);
if (ret) {
drm_mode_config_cleanup(drm);
return ret;
}
return 0;
}
static int malidp_irq_init(struct platform_device *pdev)
{
int irq_de, irq_se, ret = 0;
struct drm_device *drm = dev_get_drvdata(&pdev->dev);
/* fetch the interrupts from DT */
irq_de = platform_get_irq_byname(pdev, "DE");
if (irq_de < 0) {
DRM_ERROR("no 'DE' IRQ specified!\n");
return irq_de;
}
irq_se = platform_get_irq_byname(pdev, "SE");
if (irq_se < 0) {
DRM_ERROR("no 'SE' IRQ specified!\n");
return irq_se;
}
ret = malidp_de_irq_init(drm, irq_de);
if (ret)
return ret;
ret = malidp_se_irq_init(drm, irq_se);
if (ret) {
malidp_de_irq_fini(drm);
return ret;
}
return 0;
}
static void malidp_lastclose(struct drm_device *drm)
{
struct malidp_drm *malidp = drm->dev_private;
drm_fbdev_cma_restore_mode(malidp->fbdev);
}
static const struct file_operations fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.poll = drm_poll,
.read = drm_read,
.llseek = noop_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct drm_driver malidp_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
DRIVER_PRIME,
.lastclose = malidp_lastclose,
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = malidp_enable_vblank,
.disable_vblank = malidp_disable_vblank,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_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_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,
.fops = &fops,
.name = "mali-dp",
.desc = "ARM Mali Display Processor driver",
.date = "20160106",
.major = 1,
.minor = 0,
};
static const struct of_device_id malidp_drm_of_match[] = {
{
.compatible = "arm,mali-dp500",
.data = &malidp_device[MALIDP_500]
},
{
.compatible = "arm,mali-dp550",
.data = &malidp_device[MALIDP_550]
},
{
.compatible = "arm,mali-dp650",
.data = &malidp_device[MALIDP_650]
},
{},
};
MODULE_DEVICE_TABLE(of, malidp_drm_of_match);
#define MAX_OUTPUT_CHANNELS 3
static int malidp_bind(struct device *dev)
{
struct resource *res;
struct drm_device *drm;
struct device_node *ep;
struct malidp_drm *malidp;
struct malidp_hw_device *hwdev;
struct platform_device *pdev = to_platform_device(dev);
/* number of lines for the R, G and B output */
u8 output_width[MAX_OUTPUT_CHANNELS];
int ret = 0, i;
u32 version, out_depth = 0;
malidp = devm_kzalloc(dev, sizeof(*malidp), GFP_KERNEL);
if (!malidp)
return -ENOMEM;
hwdev = devm_kzalloc(dev, sizeof(*hwdev), GFP_KERNEL);
if (!hwdev)
return -ENOMEM;
/*
* copy the associated data from malidp_drm_of_match to avoid
* having to keep a reference to the OF node after binding
*/
memcpy(hwdev, of_device_get_match_data(dev), sizeof(*hwdev));
malidp->dev = hwdev;
INIT_LIST_HEAD(&malidp->event_list);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hwdev->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(hwdev->regs))
return PTR_ERR(hwdev->regs);
hwdev->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(hwdev->pclk))
return PTR_ERR(hwdev->pclk);
hwdev->aclk = devm_clk_get(dev, "aclk");
if (IS_ERR(hwdev->aclk))
return PTR_ERR(hwdev->aclk);
hwdev->mclk = devm_clk_get(dev, "mclk");
if (IS_ERR(hwdev->mclk))
return PTR_ERR(hwdev->mclk);
hwdev->pxlclk = devm_clk_get(dev, "pxlclk");
if (IS_ERR(hwdev->pxlclk))
return PTR_ERR(hwdev->pxlclk);
/* Get the optional framebuffer memory resource */
ret = of_reserved_mem_device_init(dev);
if (ret && ret != -ENODEV)
return ret;
drm = drm_dev_alloc(&malidp_driver, dev);
if (!drm) {
ret = -ENOMEM;
goto alloc_fail;
}
/* Enable APB clock in order to get access to the registers */
clk_prepare_enable(hwdev->pclk);
/*
* Enable AXI clock and main clock so that prefetch can start once
* the registers are set
*/
clk_prepare_enable(hwdev->aclk);
clk_prepare_enable(hwdev->mclk);
ret = hwdev->query_hw(hwdev);
if (ret) {
DRM_ERROR("Invalid HW configuration\n");
goto query_hw_fail;
}
version = malidp_hw_read(hwdev, hwdev->map.dc_base + MALIDP_DE_CORE_ID);
DRM_INFO("found ARM Mali-DP%3x version r%dp%d\n", version >> 16,
(version >> 12) & 0xf, (version >> 8) & 0xf);
/* set the number of lines used for output of RGB data */
ret = of_property_read_u8_array(dev->of_node,
"arm,malidp-output-port-lines",
output_width, MAX_OUTPUT_CHANNELS);
if (ret)
goto query_hw_fail;
for (i = 0; i < MAX_OUTPUT_CHANNELS; i++)
out_depth = (out_depth << 8) | (output_width[i] & 0xf);
malidp_hw_write(hwdev, out_depth, hwdev->map.out_depth_base);
drm->dev_private = malidp;
dev_set_drvdata(dev, drm);
atomic_set(&malidp->config_valid, 0);
init_waitqueue_head(&malidp->wq);
ret = malidp_init(drm);
if (ret < 0)
goto init_fail;
ret = drm_dev_register(drm, 0);
if (ret)
goto register_fail;
/* Set the CRTC's port so that the encoder component can find it */
ep = of_graph_get_next_endpoint(dev->of_node, NULL);
if (!ep) {
ret = -EINVAL;
goto port_fail;
}
malidp->crtc.port = of_get_next_parent(ep);
ret = component_bind_all(dev, drm);
if (ret) {
DRM_ERROR("Failed to bind all components\n");
goto bind_fail;
}
ret = malidp_irq_init(pdev);
if (ret < 0)
goto irq_init_fail;
ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
if (ret < 0) {
DRM_ERROR("failed to initialise vblank\n");
goto vblank_fail;
}
drm_mode_config_reset(drm);
malidp->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
drm->mode_config.num_connector);
if (IS_ERR(malidp->fbdev)) {
ret = PTR_ERR(malidp->fbdev);
malidp->fbdev = NULL;
goto fbdev_fail;
}
drm_kms_helper_poll_init(drm);
return 0;
fbdev_fail:
drm_vblank_cleanup(drm);
vblank_fail:
malidp_se_irq_fini(drm);
malidp_de_irq_fini(drm);
irq_init_fail:
component_unbind_all(dev, drm);
bind_fail:
of_node_put(malidp->crtc.port);
malidp->crtc.port = NULL;
port_fail:
drm_dev_unregister(drm);
register_fail:
malidp_de_planes_destroy(drm);
drm_mode_config_cleanup(drm);
init_fail:
drm->dev_private = NULL;
dev_set_drvdata(dev, NULL);
query_hw_fail:
clk_disable_unprepare(hwdev->mclk);
clk_disable_unprepare(hwdev->aclk);
clk_disable_unprepare(hwdev->pclk);
drm_dev_unref(drm);
alloc_fail:
of_reserved_mem_device_release(dev);
return ret;
}
static void malidp_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct malidp_drm *malidp = drm->dev_private;
struct malidp_hw_device *hwdev = malidp->dev;
if (malidp->fbdev) {
drm_fbdev_cma_fini(malidp->fbdev);
malidp->fbdev = NULL;
}
drm_kms_helper_poll_fini(drm);
malidp_se_irq_fini(drm);
malidp_de_irq_fini(drm);
drm_vblank_cleanup(drm);
component_unbind_all(dev, drm);
of_node_put(malidp->crtc.port);
malidp->crtc.port = NULL;
drm_dev_unregister(drm);
malidp_de_planes_destroy(drm);
drm_mode_config_cleanup(drm);
drm->dev_private = NULL;
dev_set_drvdata(dev, NULL);
clk_disable_unprepare(hwdev->mclk);
clk_disable_unprepare(hwdev->aclk);
clk_disable_unprepare(hwdev->pclk);
drm_dev_unref(drm);
of_reserved_mem_device_release(dev);
}
static const struct component_master_ops malidp_master_ops = {
.bind = malidp_bind,
.unbind = malidp_unbind,
};
static int malidp_compare_dev(struct device *dev, void *data)
{
struct device_node *np = data;
return dev->of_node == np;
}
static int malidp_platform_probe(struct platform_device *pdev)
{
struct device_node *port, *ep;
struct component_match *match = NULL;
if (!pdev->dev.of_node)
return -ENODEV;
/* there is only one output port inside each device, find it */
ep = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
if (!ep)
return -ENODEV;
if (!of_device_is_available(ep)) {
of_node_put(ep);
return -ENODEV;
}
/* add the remote encoder port as component */
port = of_graph_get_remote_port_parent(ep);
of_node_put(ep);
if (!port || !of_device_is_available(port)) {
of_node_put(port);
return -EAGAIN;
}
component_match_add(&pdev->dev, &match, malidp_compare_dev, port);
return component_master_add_with_match(&pdev->dev, &malidp_master_ops,
match);
}
static int malidp_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &malidp_master_ops);
return 0;
}
static struct platform_driver malidp_platform_driver = {
.probe = malidp_platform_probe,
.remove = malidp_platform_remove,
.driver = {
.name = "mali-dp",
.of_match_table = malidp_drm_of_match,
},
};
module_platform_driver(malidp_platform_driver);
MODULE_AUTHOR("Liviu Dudau <Liviu.Dudau@arm.com>");
MODULE_DESCRIPTION("ARM Mali DP DRM driver");
MODULE_LICENSE("GPL v2");