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linux_dsm_epyc7002/drivers/gpu/drm/rcar-du/rcar_du_drv.c
Kieran Bingham 7912dee777 drm: rcar-du: Implement system suspend/resume support 
To support system suspend operations we must ensure the hardware is
stopped, and resumed explicitly from the suspend and resume handlers.

Implement suspend and resume functions using the DRM atomic helper
functions.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
2017-12-04 13:04:11 +02:00

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/*
* rcar_du_drv.c -- R-Car Display Unit DRM driver
*
* Copyright (C) 2013-2015 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_regs.h"
/* -----------------------------------------------------------------------------
* Device Information
*/
static const struct rcar_du_device_info rzg1_du_r8a7743_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
.num_crtcs = 2,
.routes = {
/*
* R8A7743 has one RGB output and one LVDS output
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(1) | BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.port = 1,
},
},
.num_lvds = 1,
};
static const struct rcar_du_device_info rzg1_du_r8a7745_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
.num_crtcs = 2,
.routes = {
/*
* R8A7745 has two RGB outputs
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_DPAD1] = {
.possible_crtcs = BIT(1),
.port = 1,
},
},
.num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7779_info = {
.gen = 2,
.features = 0,
.num_crtcs = 2,
.routes = {
/*
* R8A7779 has two RGB outputs and one (currently unsupported)
* TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_DPAD1] = {
.possible_crtcs = BIT(1) | BIT(0),
.port = 1,
},
},
.num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7790_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
.quirks = RCAR_DU_QUIRK_ALIGN_128B | RCAR_DU_QUIRK_LVDS_LANES,
.num_crtcs = 3,
.routes = {
/*
* R8A7790 has one RGB output, two LVDS outputs and one
* (currently unsupported) TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(2) | BIT(1) | BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.port = 1,
},
[RCAR_DU_OUTPUT_LVDS1] = {
.possible_crtcs = BIT(2) | BIT(1),
.port = 2,
},
},
.num_lvds = 2,
};
/* M2-W (r8a7791) and M2-N (r8a7793) are identical */
static const struct rcar_du_device_info rcar_du_r8a7791_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
.num_crtcs = 2,
.routes = {
/*
* R8A779[13] has one RGB output, one LVDS output and one
* (currently unsupported) TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(1) | BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.port = 1,
},
},
.num_lvds = 1,
};
static const struct rcar_du_device_info rcar_du_r8a7792_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
.num_crtcs = 2,
.routes = {
/* R8A7792 has two RGB outputs. */
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_DPAD1] = {
.possible_crtcs = BIT(1),
.port = 1,
},
},
.num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7794_info = {
.gen = 2,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS,
.num_crtcs = 2,
.routes = {
/*
* R8A7794 has two RGB outputs and one (currently unsupported)
* TCON output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(0),
.port = 0,
},
[RCAR_DU_OUTPUT_DPAD1] = {
.possible_crtcs = BIT(1),
.port = 1,
},
},
.num_lvds = 0,
};
static const struct rcar_du_device_info rcar_du_r8a7795_info = {
.gen = 3,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS
| RCAR_DU_FEATURE_VSP1_SOURCE,
.num_crtcs = 4,
.routes = {
/*
* R8A7795 has one RGB output, two HDMI outputs and one
* LVDS output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(3),
.port = 0,
},
[RCAR_DU_OUTPUT_HDMI0] = {
.possible_crtcs = BIT(1),
.port = 1,
},
[RCAR_DU_OUTPUT_HDMI1] = {
.possible_crtcs = BIT(2),
.port = 2,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.port = 3,
},
},
.num_lvds = 1,
.dpll_ch = BIT(1) | BIT(2),
};
static const struct rcar_du_device_info rcar_du_r8a7796_info = {
.gen = 3,
.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
| RCAR_DU_FEATURE_EXT_CTRL_REGS
| RCAR_DU_FEATURE_VSP1_SOURCE,
.num_crtcs = 3,
.routes = {
/*
* R8A7796 has one RGB output, one LVDS output and one HDMI
* output.
*/
[RCAR_DU_OUTPUT_DPAD0] = {
.possible_crtcs = BIT(2),
.port = 0,
},
[RCAR_DU_OUTPUT_HDMI0] = {
.possible_crtcs = BIT(1),
.port = 1,
},
[RCAR_DU_OUTPUT_LVDS0] = {
.possible_crtcs = BIT(0),
.port = 2,
},
},
.num_lvds = 1,
.dpll_ch = BIT(1),
};
static const struct of_device_id rcar_du_of_table[] = {
{ .compatible = "renesas,du-r8a7743", .data = &rzg1_du_r8a7743_info },
{ .compatible = "renesas,du-r8a7745", .data = &rzg1_du_r8a7745_info },
{ .compatible = "renesas,du-r8a7779", .data = &rcar_du_r8a7779_info },
{ .compatible = "renesas,du-r8a7790", .data = &rcar_du_r8a7790_info },
{ .compatible = "renesas,du-r8a7791", .data = &rcar_du_r8a7791_info },
{ .compatible = "renesas,du-r8a7792", .data = &rcar_du_r8a7792_info },
{ .compatible = "renesas,du-r8a7793", .data = &rcar_du_r8a7791_info },
{ .compatible = "renesas,du-r8a7794", .data = &rcar_du_r8a7794_info },
{ .compatible = "renesas,du-r8a7795", .data = &rcar_du_r8a7795_info },
{ .compatible = "renesas,du-r8a7796", .data = &rcar_du_r8a7796_info },
{ }
};
MODULE_DEVICE_TABLE(of, rcar_du_of_table);
/* -----------------------------------------------------------------------------
* DRM operations
*/
static void rcar_du_lastclose(struct drm_device *dev)
{
struct rcar_du_device *rcdu = dev->dev_private;
drm_fbdev_cma_restore_mode(rcdu->fbdev);
}
DEFINE_DRM_GEM_CMA_FOPS(rcar_du_fops);
static struct drm_driver rcar_du_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME
| DRIVER_ATOMIC,
.lastclose = rcar_du_lastclose,
.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 = rcar_du_dumb_create,
.fops = &rcar_du_fops,
.name = "rcar-du",
.desc = "Renesas R-Car Display Unit",
.date = "20130110",
.major = 1,
.minor = 0,
};
/* -----------------------------------------------------------------------------
* Power management
*/
#ifdef CONFIG_PM_SLEEP
static int rcar_du_pm_suspend(struct device *dev)
{
struct rcar_du_device *rcdu = dev_get_drvdata(dev);
struct drm_atomic_state *state;
drm_kms_helper_poll_disable(rcdu->ddev);
drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, true);
state = drm_atomic_helper_suspend(rcdu->ddev);
if (IS_ERR(state)) {
drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
drm_kms_helper_poll_enable(rcdu->ddev);
return PTR_ERR(state);
}
rcdu->suspend_state = state;
return 0;
}
static int rcar_du_pm_resume(struct device *dev)
{
struct rcar_du_device *rcdu = dev_get_drvdata(dev);
drm_atomic_helper_resume(rcdu->ddev, rcdu->suspend_state);
drm_fbdev_cma_set_suspend_unlocked(rcdu->fbdev, false);
drm_kms_helper_poll_enable(rcdu->ddev);
return 0;
}
#endif
static const struct dev_pm_ops rcar_du_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(rcar_du_pm_suspend, rcar_du_pm_resume)
};
/* -----------------------------------------------------------------------------
* Platform driver
*/
static int rcar_du_remove(struct platform_device *pdev)
{
struct rcar_du_device *rcdu = platform_get_drvdata(pdev);
struct drm_device *ddev = rcdu->ddev;
drm_dev_unregister(ddev);
if (rcdu->fbdev)
drm_fbdev_cma_fini(rcdu->fbdev);
drm_kms_helper_poll_fini(ddev);
drm_mode_config_cleanup(ddev);
drm_dev_unref(ddev);
return 0;
}
static int rcar_du_probe(struct platform_device *pdev)
{
struct rcar_du_device *rcdu;
struct drm_device *ddev;
struct resource *mem;
int ret;
/* Allocate and initialize the R-Car device structure. */
rcdu = devm_kzalloc(&pdev->dev, sizeof(*rcdu), GFP_KERNEL);
if (rcdu == NULL)
return -ENOMEM;
rcdu->dev = &pdev->dev;
rcdu->info = of_device_get_match_data(rcdu->dev);
platform_set_drvdata(pdev, rcdu);
/* I/O resources */
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rcdu->mmio = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(rcdu->mmio))
return PTR_ERR(rcdu->mmio);
/* DRM/KMS objects */
ddev = drm_dev_alloc(&rcar_du_driver, &pdev->dev);
if (IS_ERR(ddev))
return PTR_ERR(ddev);
rcdu->ddev = ddev;
ddev->dev_private = rcdu;
ret = rcar_du_modeset_init(rcdu);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev,
"failed to initialize DRM/KMS (%d)\n", ret);
goto error;
}
ddev->irq_enabled = 1;
/*
* Register the DRM device with the core and the connectors with
* sysfs.
*/
ret = drm_dev_register(ddev, 0);
if (ret)
goto error;
DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));
return 0;
error:
rcar_du_remove(pdev);
return ret;
}
static struct platform_driver rcar_du_platform_driver = {
.probe = rcar_du_probe,
.remove = rcar_du_remove,
.driver = {
.name = "rcar-du",
.pm = &rcar_du_pm_ops,
.of_match_table = rcar_du_of_table,
},
};
module_platform_driver(rcar_du_platform_driver);
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
MODULE_LICENSE("GPL");
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