linux/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
Daniel Vetter 70a59dd829 drm/<drivers>: Constify struct drm_driver
Only the following drivers aren't converted:
- amdgpu, because of the driver_feature mangling due to virt support.
  Subsequent patch will address this.
- nouveau, because DRIVER_ATOMIC uapi is still not the default on the
  platforms where it's supported (i.e. again driver_feature mangling)
- vc4, again because of driver_feature mangling
- qxl, because the ioctl table is somewhere else and moving that is
  maybe a bit too much, hence the num_ioctls assignment prevents a
  const driver structure.
- arcpgu, because that is stuck behind a pending tiny-fication series
  from me.
- legacy drivers, because legacy requires non-const drm_driver.

Note that for armada I also went ahead and made the ioctl array const.

Only cc'ing the driver people who've not been converted (everyone else
is way too much).

v2: Fix one misplaced const static, should be static const (0day)

v3:
- Improve commit message (Sam)

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: kernel test robot <lkp@intel.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: virtualization@lists.linux-foundation.org
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: nouveau@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201104100425.1922351-5-daniel.vetter@ffwll.ch
2020-11-06 10:31:26 +01:00

296 lines
7.2 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* ZynqMP DisplayPort Subsystem Driver
*
* Copyright (C) 2017 - 2020 Xilinx, Inc.
*
* Authors:
* - Hyun Woo Kwon <hyun.kwon@xilinx.com>
* - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*/
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_mode_config.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "zynqmp_disp.h"
#include "zynqmp_dp.h"
#include "zynqmp_dpsub.h"
/* -----------------------------------------------------------------------------
* Dumb Buffer & Framebuffer Allocation
*/
static int zynqmp_dpsub_dumb_create(struct drm_file *file_priv,
struct drm_device *drm,
struct drm_mode_create_dumb *args)
{
struct zynqmp_dpsub *dpsub = to_zynqmp_dpsub(drm);
unsigned int pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
/* Enforce the alignment constraints of the DMA engine. */
args->pitch = ALIGN(pitch, dpsub->dma_align);
return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
}
static struct drm_framebuffer *
zynqmp_dpsub_fb_create(struct drm_device *drm, struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
struct zynqmp_dpsub *dpsub = to_zynqmp_dpsub(drm);
struct drm_mode_fb_cmd2 cmd = *mode_cmd;
unsigned int i;
/* Enforce the alignment constraints of the DMA engine. */
for (i = 0; i < ARRAY_SIZE(cmd.pitches); ++i)
cmd.pitches[i] = ALIGN(cmd.pitches[i], dpsub->dma_align);
return drm_gem_fb_create(drm, file_priv, &cmd);
}
static const struct drm_mode_config_funcs zynqmp_dpsub_mode_config_funcs = {
.fb_create = zynqmp_dpsub_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
/* -----------------------------------------------------------------------------
* DRM/KMS Driver
*/
DEFINE_DRM_GEM_CMA_FOPS(zynqmp_dpsub_drm_fops);
static const struct drm_driver zynqmp_dpsub_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM |
DRIVER_ATOMIC,
DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(zynqmp_dpsub_dumb_create),
.fops = &zynqmp_dpsub_drm_fops,
.name = "zynqmp-dpsub",
.desc = "Xilinx DisplayPort Subsystem Driver",
.date = "20130509",
.major = 1,
.minor = 0,
};
static int zynqmp_dpsub_drm_init(struct zynqmp_dpsub *dpsub)
{
struct drm_device *drm = &dpsub->drm;
int ret;
/* Initialize mode config, vblank and the KMS poll helper. */
ret = drmm_mode_config_init(drm);
if (ret < 0)
return ret;
drm->mode_config.funcs = &zynqmp_dpsub_mode_config_funcs;
drm->mode_config.min_width = 0;
drm->mode_config.min_height = 0;
drm->mode_config.max_width = ZYNQMP_DISP_MAX_WIDTH;
drm->mode_config.max_height = ZYNQMP_DISP_MAX_HEIGHT;
ret = drm_vblank_init(drm, 1);
if (ret)
return ret;
drm->irq_enabled = 1;
drm_kms_helper_poll_init(drm);
/*
* Initialize the DISP and DP components. This will creates planes,
* CRTC, encoder and connector. The DISP should be initialized first as
* the DP encoder needs the CRTC.
*/
ret = zynqmp_disp_drm_init(dpsub);
if (ret)
goto err_poll_fini;
ret = zynqmp_dp_drm_init(dpsub);
if (ret)
goto err_poll_fini;
/* Reset all components and register the DRM device. */
drm_mode_config_reset(drm);
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto err_poll_fini;
/* Initialize fbdev generic emulation. */
drm_fbdev_generic_setup(drm, 24);
return 0;
err_poll_fini:
drm_kms_helper_poll_fini(drm);
return ret;
}
/* -----------------------------------------------------------------------------
* Power Management
*/
static int __maybe_unused zynqmp_dpsub_suspend(struct device *dev)
{
struct zynqmp_dpsub *dpsub = dev_get_drvdata(dev);
return drm_mode_config_helper_suspend(&dpsub->drm);
}
static int __maybe_unused zynqmp_dpsub_resume(struct device *dev)
{
struct zynqmp_dpsub *dpsub = dev_get_drvdata(dev);
return drm_mode_config_helper_resume(&dpsub->drm);
}
static const struct dev_pm_ops zynqmp_dpsub_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(zynqmp_dpsub_suspend, zynqmp_dpsub_resume)
};
/* -----------------------------------------------------------------------------
* Probe & Remove
*/
static int zynqmp_dpsub_init_clocks(struct zynqmp_dpsub *dpsub)
{
int ret;
dpsub->apb_clk = devm_clk_get(dpsub->dev, "dp_apb_clk");
if (IS_ERR(dpsub->apb_clk))
return PTR_ERR(dpsub->apb_clk);
ret = clk_prepare_enable(dpsub->apb_clk);
if (ret) {
dev_err(dpsub->dev, "failed to enable the APB clock\n");
return ret;
}
return 0;
}
static int zynqmp_dpsub_probe(struct platform_device *pdev)
{
struct zynqmp_dpsub *dpsub;
int ret;
/* Allocate private data. */
dpsub = devm_drm_dev_alloc(&pdev->dev, &zynqmp_dpsub_drm_driver,
struct zynqmp_dpsub, drm);
if (IS_ERR(dpsub))
return PTR_ERR(dpsub);
dpsub->dev = &pdev->dev;
platform_set_drvdata(pdev, dpsub);
dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));
/* Try the reserved memory. Proceed if there's none. */
of_reserved_mem_device_init(&pdev->dev);
ret = zynqmp_dpsub_init_clocks(dpsub);
if (ret < 0)
goto err_mem;
pm_runtime_enable(&pdev->dev);
/*
* DP should be probed first so that the zynqmp_disp can set the output
* format accordingly.
*/
ret = zynqmp_dp_probe(dpsub, &dpsub->drm);
if (ret)
goto err_pm;
ret = zynqmp_disp_probe(dpsub, &dpsub->drm);
if (ret)
goto err_dp;
ret = zynqmp_dpsub_drm_init(dpsub);
if (ret)
goto err_disp;
dev_info(&pdev->dev, "ZynqMP DisplayPort Subsystem driver probed");
return 0;
err_disp:
zynqmp_disp_remove(dpsub);
err_dp:
zynqmp_dp_remove(dpsub);
err_pm:
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(dpsub->apb_clk);
err_mem:
of_reserved_mem_device_release(&pdev->dev);
return ret;
}
static int zynqmp_dpsub_remove(struct platform_device *pdev)
{
struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev);
struct drm_device *drm = &dpsub->drm;
drm_dev_unregister(drm);
drm_atomic_helper_shutdown(drm);
drm_kms_helper_poll_fini(drm);
zynqmp_disp_remove(dpsub);
zynqmp_dp_remove(dpsub);
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(dpsub->apb_clk);
of_reserved_mem_device_release(&pdev->dev);
return 0;
}
static void zynqmp_dpsub_shutdown(struct platform_device *pdev)
{
struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev);
drm_atomic_helper_shutdown(&dpsub->drm);
}
static const struct of_device_id zynqmp_dpsub_of_match[] = {
{ .compatible = "xlnx,zynqmp-dpsub-1.7", },
{ /* end of table */ },
};
MODULE_DEVICE_TABLE(of, zynqmp_dpsub_of_match);
static struct platform_driver zynqmp_dpsub_driver = {
.probe = zynqmp_dpsub_probe,
.remove = zynqmp_dpsub_remove,
.shutdown = zynqmp_dpsub_shutdown,
.driver = {
.name = "zynqmp-dpsub",
.pm = &zynqmp_dpsub_pm_ops,
.of_match_table = zynqmp_dpsub_of_match,
},
};
module_platform_driver(zynqmp_dpsub_driver);
MODULE_AUTHOR("Xilinx, Inc.");
MODULE_DESCRIPTION("ZynqMP DP Subsystem Driver");
MODULE_LICENSE("GPL v2");