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linux-sg2042/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c

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/*
* Copyright (C) 2014 Traphandler
* Copyright (C) 2014 Free Electrons
* Copyright (C) 2014 Atmel
*
* Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
* Author: Boris BREZILLON <boris.brezillon@free-electrons.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.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include "atmel_hlcdc_dc.h"
#define ATMEL_HLCDC_LAYER_IRQS_OFFSET 8
static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9n12_layers[] = {
{
.name = "base",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x40,
.id = 0,
.type = ATMEL_HLCDC_BASE_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.xstride = { 2 },
.default_color = 3,
.general_config = 4,
},
.clut_offset = 0x400,
},
};
static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9n12 = {
.min_width = 0,
.min_height = 0,
.max_width = 1280,
.max_height = 860,
.max_spw = 0x3f,
.max_vpw = 0x3f,
.max_hpw = 0xff,
.conflicting_output_formats = true,
.nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9n12_layers),
.layers = atmel_hlcdc_at91sam9n12_layers,
};
static const struct atmel_hlcdc_layer_desc atmel_hlcdc_at91sam9x5_layers[] = {
{
.name = "base",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x40,
.id = 0,
.type = ATMEL_HLCDC_BASE_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.xstride = { 2 },
.default_color = 3,
.general_config = 4,
.disc_pos = 5,
.disc_size = 6,
},
.clut_offset = 0x400,
},
{
.name = "overlay1",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x100,
.id = 1,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.pstride = { 5 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
},
.clut_offset = 0x800,
},
{
.name = "high-end-overlay",
.formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
.regs_offset = 0x280,
.id = 2,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x4c,
.layout = {
.pos = 2,
.size = 3,
.memsize = 4,
.xstride = { 5, 7 },
.pstride = { 6, 8 },
.default_color = 9,
.chroma_key = 10,
.chroma_key_mask = 11,
.general_config = 12,
.scaler_config = 13,
.csc = 14,
},
.clut_offset = 0x1000,
},
{
.name = "cursor",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x340,
.id = 3,
.type = ATMEL_HLCDC_CURSOR_LAYER,
.max_width = 128,
.max_height = 128,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
},
.clut_offset = 0x1400,
},
};
static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_at91sam9x5 = {
.min_width = 0,
.min_height = 0,
.max_width = 800,
.max_height = 600,
.max_spw = 0x3f,
.max_vpw = 0x3f,
.max_hpw = 0xff,
.conflicting_output_formats = true,
.nlayers = ARRAY_SIZE(atmel_hlcdc_at91sam9x5_layers),
.layers = atmel_hlcdc_at91sam9x5_layers,
};
static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d3_layers[] = {
{
.name = "base",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x40,
.id = 0,
.type = ATMEL_HLCDC_BASE_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.xstride = { 2 },
.default_color = 3,
.general_config = 4,
.disc_pos = 5,
.disc_size = 6,
},
.clut_offset = 0x600,
},
{
.name = "overlay1",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x140,
.id = 1,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.pstride = { 5 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
},
.clut_offset = 0xa00,
},
{
.name = "overlay2",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x240,
.id = 2,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.pstride = { 5 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
},
.clut_offset = 0xe00,
},
{
.name = "high-end-overlay",
.formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
.regs_offset = 0x340,
.id = 3,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x4c,
.layout = {
.pos = 2,
.size = 3,
.memsize = 4,
.xstride = { 5, 7 },
.pstride = { 6, 8 },
.default_color = 9,
.chroma_key = 10,
.chroma_key_mask = 11,
.general_config = 12,
.scaler_config = 13,
.phicoeffs = {
.x = 17,
.y = 33,
},
.csc = 14,
},
.clut_offset = 0x1200,
},
{
.name = "cursor",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x440,
.id = 4,
.type = ATMEL_HLCDC_CURSOR_LAYER,
.max_width = 128,
.max_height = 128,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.pstride = { 5 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
.scaler_config = 13,
},
.clut_offset = 0x1600,
},
};
static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d3 = {
.min_width = 0,
.min_height = 0,
.max_width = 2048,
.max_height = 2048,
.max_spw = 0x3f,
.max_vpw = 0x3f,
.max_hpw = 0x1ff,
.conflicting_output_formats = true,
.nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d3_layers),
.layers = atmel_hlcdc_sama5d3_layers,
};
static const struct atmel_hlcdc_layer_desc atmel_hlcdc_sama5d4_layers[] = {
{
.name = "base",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x40,
.id = 0,
.type = ATMEL_HLCDC_BASE_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.xstride = { 2 },
.default_color = 3,
.general_config = 4,
.disc_pos = 5,
.disc_size = 6,
},
.clut_offset = 0x600,
},
{
.name = "overlay1",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x140,
.id = 1,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.pstride = { 5 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
},
.clut_offset = 0xa00,
},
{
.name = "overlay2",
.formats = &atmel_hlcdc_plane_rgb_formats,
.regs_offset = 0x240,
.id = 2,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x2c,
.layout = {
.pos = 2,
.size = 3,
.xstride = { 4 },
.pstride = { 5 },
.default_color = 6,
.chroma_key = 7,
.chroma_key_mask = 8,
.general_config = 9,
},
.clut_offset = 0xe00,
},
{
.name = "high-end-overlay",
.formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
.regs_offset = 0x340,
.id = 3,
.type = ATMEL_HLCDC_OVERLAY_LAYER,
.cfgs_offset = 0x4c,
.layout = {
.pos = 2,
.size = 3,
.memsize = 4,
.xstride = { 5, 7 },
.pstride = { 6, 8 },
.default_color = 9,
.chroma_key = 10,
.chroma_key_mask = 11,
.general_config = 12,
.scaler_config = 13,
.phicoeffs = {
.x = 17,
.y = 33,
},
.csc = 14,
},
.clut_offset = 0x1200,
},
};
static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sama5d4 = {
.min_width = 0,
.min_height = 0,
.max_width = 2048,
.max_height = 2048,
.max_spw = 0xff,
.max_vpw = 0xff,
.max_hpw = 0x3ff,
.nlayers = ARRAY_SIZE(atmel_hlcdc_sama5d4_layers),
.layers = atmel_hlcdc_sama5d4_layers,
};
static const struct of_device_id atmel_hlcdc_of_match[] = {
{
.compatible = "atmel,at91sam9n12-hlcdc",
.data = &atmel_hlcdc_dc_at91sam9n12,
},
{
.compatible = "atmel,at91sam9x5-hlcdc",
.data = &atmel_hlcdc_dc_at91sam9x5,
},
{
.compatible = "atmel,sama5d2-hlcdc",
.data = &atmel_hlcdc_dc_sama5d4,
},
{
.compatible = "atmel,sama5d3-hlcdc",
.data = &atmel_hlcdc_dc_sama5d3,
},
{
.compatible = "atmel,sama5d4-hlcdc",
.data = &atmel_hlcdc_dc_sama5d4,
},
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, atmel_hlcdc_of_match);
enum drm_mode_status
atmel_hlcdc_dc_mode_valid(struct atmel_hlcdc_dc *dc,
const struct drm_display_mode *mode)
{
int vfront_porch = mode->vsync_start - mode->vdisplay;
int vback_porch = mode->vtotal - mode->vsync_end;
int vsync_len = mode->vsync_end - mode->vsync_start;
int hfront_porch = mode->hsync_start - mode->hdisplay;
int hback_porch = mode->htotal - mode->hsync_end;
int hsync_len = mode->hsync_end - mode->hsync_start;
if (hsync_len > dc->desc->max_spw + 1 || hsync_len < 1)
return MODE_HSYNC;
if (vsync_len > dc->desc->max_spw + 1 || vsync_len < 1)
return MODE_VSYNC;
if (hfront_porch > dc->desc->max_hpw + 1 || hfront_porch < 1 ||
hback_porch > dc->desc->max_hpw + 1 || hback_porch < 1 ||
mode->hdisplay < 1)
return MODE_H_ILLEGAL;
if (vfront_porch > dc->desc->max_vpw + 1 || vfront_porch < 1 ||
vback_porch > dc->desc->max_vpw || vback_porch < 0 ||
mode->vdisplay < 1)
return MODE_V_ILLEGAL;
return MODE_OK;
}
static void atmel_hlcdc_layer_irq(struct atmel_hlcdc_layer *layer)
{
if (!layer)
return;
if (layer->desc->type == ATMEL_HLCDC_BASE_LAYER ||
layer->desc->type == ATMEL_HLCDC_OVERLAY_LAYER ||
layer->desc->type == ATMEL_HLCDC_CURSOR_LAYER)
atmel_hlcdc_plane_irq(atmel_hlcdc_layer_to_plane(layer));
}
static irqreturn_t atmel_hlcdc_dc_irq_handler(int irq, void *data)
{
struct drm_device *dev = data;
struct atmel_hlcdc_dc *dc = dev->dev_private;
unsigned long status;
unsigned int imr, isr;
int i;
regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_IMR, &imr);
regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
status = imr & isr;
if (!status)
return IRQ_NONE;
if (status & ATMEL_HLCDC_SOF)
atmel_hlcdc_crtc_irq(dc->crtc);
for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
if (ATMEL_HLCDC_LAYER_STATUS(i) & status)
atmel_hlcdc_layer_irq(dc->layers[i]);
}
return IRQ_HANDLED;
}
static struct drm_framebuffer *atmel_hlcdc_fb_create(struct drm_device *dev,
struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd)
{
return drm_gem_fb_create(dev, file_priv, mode_cmd);
}
struct atmel_hlcdc_dc_commit {
struct work_struct work;
struct drm_device *dev;
struct drm_atomic_state *state;
};
static void
atmel_hlcdc_dc_atomic_complete(struct atmel_hlcdc_dc_commit *commit)
{
struct drm_device *dev = commit->dev;
struct atmel_hlcdc_dc *dc = dev->dev_private;
struct drm_atomic_state *old_state = commit->state;
/* Apply the atomic update. */
drm_atomic_helper_commit_modeset_disables(dev, old_state);
drm_atomic_helper_commit_planes(dev, old_state, 0);
drm_atomic_helper_commit_modeset_enables(dev, old_state);
drm_atomic_helper_wait_for_vblanks(dev, old_state);
drm_atomic_helper_cleanup_planes(dev, old_state);
drm_atomic_state_put(old_state);
/* Complete the commit, wake up any waiter. */
spin_lock(&dc->commit.wait.lock);
dc->commit.pending = false;
wake_up_all_locked(&dc->commit.wait);
spin_unlock(&dc->commit.wait.lock);
kfree(commit);
}
static void atmel_hlcdc_dc_atomic_work(struct work_struct *work)
{
struct atmel_hlcdc_dc_commit *commit =
container_of(work, struct atmel_hlcdc_dc_commit, work);
atmel_hlcdc_dc_atomic_complete(commit);
}
static int atmel_hlcdc_dc_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool async)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
struct atmel_hlcdc_dc_commit *commit;
int ret;
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
/* Allocate the commit object. */
commit = kzalloc(sizeof(*commit), GFP_KERNEL);
if (!commit) {
ret = -ENOMEM;
goto error;
}
INIT_WORK(&commit->work, atmel_hlcdc_dc_atomic_work);
commit->dev = dev;
commit->state = state;
spin_lock(&dc->commit.wait.lock);
ret = wait_event_interruptible_locked(dc->commit.wait,
!dc->commit.pending);
if (ret == 0)
dc->commit.pending = true;
spin_unlock(&dc->commit.wait.lock);
if (ret)
goto err_free;
/* We have our own synchronization through the commit lock. */
BUG_ON(drm_atomic_helper_swap_state(state, false) < 0);
/* Swap state succeeded, this is the point of no return. */
drm_atomic_state_get(state);
if (async)
queue_work(dc->wq, &commit->work);
else
atmel_hlcdc_dc_atomic_complete(commit);
return 0;
err_free:
kfree(commit);
error:
drm_atomic_helper_cleanup_planes(dev, state);
return ret;
}
static const struct drm_mode_config_funcs mode_config_funcs = {
.fb_create = atmel_hlcdc_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = atmel_hlcdc_dc_atomic_commit,
};
static int atmel_hlcdc_dc_modeset_init(struct drm_device *dev)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
int ret;
drm_mode_config_init(dev);
ret = atmel_hlcdc_create_outputs(dev);
if (ret) {
dev_err(dev->dev, "failed to create HLCDC outputs: %d\n", ret);
return ret;
}
ret = atmel_hlcdc_create_planes(dev);
if (ret) {
dev_err(dev->dev, "failed to create planes: %d\n", ret);
return ret;
}
ret = atmel_hlcdc_crtc_create(dev);
if (ret) {
dev_err(dev->dev, "failed to create crtc\n");
return ret;
}
dev->mode_config.min_width = dc->desc->min_width;
dev->mode_config.min_height = dc->desc->min_height;
dev->mode_config.max_width = dc->desc->max_width;
dev->mode_config.max_height = dc->desc->max_height;
dev->mode_config.funcs = &mode_config_funcs;
return 0;
}
static int atmel_hlcdc_dc_load(struct drm_device *dev)
{
struct platform_device *pdev = to_platform_device(dev->dev);
const struct of_device_id *match;
struct atmel_hlcdc_dc *dc;
int ret;
match = of_match_node(atmel_hlcdc_of_match, dev->dev->parent->of_node);
if (!match) {
dev_err(&pdev->dev, "invalid compatible string\n");
return -ENODEV;
}
if (!match->data) {
dev_err(&pdev->dev, "invalid hlcdc description\n");
return -EINVAL;
}
dc = devm_kzalloc(dev->dev, sizeof(*dc), GFP_KERNEL);
if (!dc)
return -ENOMEM;
dc->wq = alloc_ordered_workqueue("atmel-hlcdc-dc", 0);
if (!dc->wq)
return -ENOMEM;
init_waitqueue_head(&dc->commit.wait);
dc->desc = match->data;
dc->hlcdc = dev_get_drvdata(dev->dev->parent);
dev->dev_private = dc;
ret = clk_prepare_enable(dc->hlcdc->periph_clk);
if (ret) {
dev_err(dev->dev, "failed to enable periph_clk\n");
goto err_destroy_wq;
}
pm_runtime_enable(dev->dev);
ret = drm_vblank_init(dev, 1);
if (ret < 0) {
dev_err(dev->dev, "failed to initialize vblank\n");
goto err_periph_clk_disable;
}
ret = atmel_hlcdc_dc_modeset_init(dev);
if (ret < 0) {
dev_err(dev->dev, "failed to initialize mode setting\n");
goto err_periph_clk_disable;
}
drm_mode_config_reset(dev);
pm_runtime_get_sync(dev->dev);
ret = drm_irq_install(dev, dc->hlcdc->irq);
pm_runtime_put_sync(dev->dev);
if (ret < 0) {
dev_err(dev->dev, "failed to install IRQ handler\n");
goto err_periph_clk_disable;
}
platform_set_drvdata(pdev, dev);
drm_kms_helper_poll_init(dev);
return 0;
err_periph_clk_disable:
pm_runtime_disable(dev->dev);
clk_disable_unprepare(dc->hlcdc->periph_clk);
err_destroy_wq:
destroy_workqueue(dc->wq);
return ret;
}
static void atmel_hlcdc_dc_unload(struct drm_device *dev)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
flush_workqueue(dc->wq);
drm_kms_helper_poll_fini(dev);
drm_atomic_helper_shutdown(dev);
drm_mode_config_cleanup(dev);
pm_runtime_get_sync(dev->dev);
drm_irq_uninstall(dev);
pm_runtime_put_sync(dev->dev);
dev->dev_private = NULL;
pm_runtime_disable(dev->dev);
clk_disable_unprepare(dc->hlcdc->periph_clk);
destroy_workqueue(dc->wq);
}
static int atmel_hlcdc_dc_irq_postinstall(struct drm_device *dev)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
unsigned int cfg = 0;
int i;
/* Enable interrupts on activated layers */
for (i = 0; i < ATMEL_HLCDC_MAX_LAYERS; i++) {
if (dc->layers[i])
cfg |= ATMEL_HLCDC_LAYER_STATUS(i);
}
regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, cfg);
return 0;
}
static void atmel_hlcdc_dc_irq_uninstall(struct drm_device *dev)
{
struct atmel_hlcdc_dc *dc = dev->dev_private;
unsigned int isr;
regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IDR, 0xffffffff);
regmap_read(dc->hlcdc->regmap, ATMEL_HLCDC_ISR, &isr);
}
DEFINE_DRM_GEM_CMA_FOPS(fops);
static struct drm_driver atmel_hlcdc_dc_driver = {
.driver_features = DRIVER_GEM |
DRIVER_MODESET | DRIVER_PRIME |
DRIVER_ATOMIC,
.irq_handler = atmel_hlcdc_dc_irq_handler,
.irq_preinstall = atmel_hlcdc_dc_irq_uninstall,
.irq_postinstall = atmel_hlcdc_dc_irq_postinstall,
.irq_uninstall = atmel_hlcdc_dc_irq_uninstall,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_export = drm_gem_prime_export,
.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,
.dumb_create = drm_gem_cma_dumb_create,
.fops = &fops,
.name = "atmel-hlcdc",
.desc = "Atmel HLCD Controller DRM",
.date = "20141504",
.major = 1,
.minor = 0,
};
static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
{
struct drm_device *ddev;
int ret;
ddev = drm_dev_alloc(&atmel_hlcdc_dc_driver, &pdev->dev);
if (IS_ERR(ddev))
return PTR_ERR(ddev);
ret = atmel_hlcdc_dc_load(ddev);
if (ret)
goto err_put;
ret = drm_dev_register(ddev, 0);
if (ret)
goto err_unload;
drm_fbdev_generic_setup(ddev, 24);
return 0;
err_unload:
atmel_hlcdc_dc_unload(ddev);
err_put:
drm_dev_put(ddev);
return ret;
}
static int atmel_hlcdc_dc_drm_remove(struct platform_device *pdev)
{
struct drm_device *ddev = platform_get_drvdata(pdev);
drm_dev_unregister(ddev);
atmel_hlcdc_dc_unload(ddev);
drm_dev_put(ddev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
struct regmap *regmap = dc->hlcdc->regmap;
struct drm_atomic_state *state;
state = drm_atomic_helper_suspend(drm_dev);
if (IS_ERR(state))
return PTR_ERR(state);
dc->suspend.state = state;
regmap_read(regmap, ATMEL_HLCDC_IMR, &dc->suspend.imr);
regmap_write(regmap, ATMEL_HLCDC_IDR, dc->suspend.imr);
clk_disable_unprepare(dc->hlcdc->periph_clk);
return 0;
}
static int atmel_hlcdc_dc_drm_resume(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
clk_prepare_enable(dc->hlcdc->periph_clk);
regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, dc->suspend.imr);
return drm_atomic_helper_resume(drm_dev, dc->suspend.state);
}
#endif
static SIMPLE_DEV_PM_OPS(atmel_hlcdc_dc_drm_pm_ops,
atmel_hlcdc_dc_drm_suspend, atmel_hlcdc_dc_drm_resume);
static const struct of_device_id atmel_hlcdc_dc_of_match[] = {
{ .compatible = "atmel,hlcdc-display-controller" },
{ },
};
static struct platform_driver atmel_hlcdc_dc_platform_driver = {
.probe = atmel_hlcdc_dc_drm_probe,
.remove = atmel_hlcdc_dc_drm_remove,
.driver = {
.name = "atmel-hlcdc-display-controller",
.pm = &atmel_hlcdc_dc_drm_pm_ops,
.of_match_table = atmel_hlcdc_dc_of_match,
},
};
module_platform_driver(atmel_hlcdc_dc_platform_driver);
MODULE_AUTHOR("Jean-Jacques Hiblot <jjhiblot@traphandler.com>");
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
MODULE_DESCRIPTION("Atmel HLCDC Display Controller DRM Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:atmel-hlcdc-dc");
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