Re: [PATCH 3/9] drm/verisilicon: Add basic drm driver

From: Nicolas Dufresne
Date: Fri Jul 07 2023 - 14:10:00 EST

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In reply to: Keith Zhao: "Re: [PATCH 3/9] drm/verisilicon: Add basic drm driver"
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Hi Thomas,

Le lundi 19 juin 2023 à 14:59 +0200, Thomas Zimmermann a écrit :
> Hi,
>
> I appreciate that you split the driver into small patches. Please find
> some comments below.
>
> Am 02.06.23 um 09:40 schrieb Keith Zhao:
> > Add a basic platform driver of the DRM driver for JH7110 SoC.
> >
> > Signed-off-by: Keith Zhao <keith.zhao@xxxxxxxxxxxxxxxx>
> > ---
> > MAINTAINERS | 2 +
> > drivers/gpu/drm/Kconfig | 2 +
> > drivers/gpu/drm/Makefile | 1 +
> > drivers/gpu/drm/verisilicon/Kconfig | 13 ++
> > drivers/gpu/drm/verisilicon/Makefile | 6 +
> > drivers/gpu/drm/verisilicon/vs_drv.c | 284 +++++++++++++++++++++++++++
> > drivers/gpu/drm/verisilicon/vs_drv.h | 48 +++++
> > include/uapi/drm/drm_fourcc.h | 83 ++++++++
> > include/uapi/drm/vs_drm.h | 50 +++++
> > 9 files changed, 489 insertions(+)
> > create mode 100644 drivers/gpu/drm/verisilicon/Kconfig
> > create mode 100644 drivers/gpu/drm/verisilicon/Makefile
> > create mode 100644 drivers/gpu/drm/verisilicon/vs_drv.c
> > create mode 100644 drivers/gpu/drm/verisilicon/vs_drv.h
> > create mode 100644 include/uapi/drm/vs_drm.h
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 293aa13d484c..da5b6766a7bb 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -7055,6 +7055,8 @@ L: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > S: Maintained
> > T: git git://anongit.freedesktop.org/drm/drm-misc
> > F: Documentation/devicetree/bindings/display/verisilicon/
> > +F: drivers/gpu/drm/verisilicon/
> > +F: include/uapi/drm/vs_drm.h
> >
> > DRM DRIVERS FOR VIVANTE GPU IP
> > M: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> > diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> > index ba3fb04bb691..f7e461fa4656 100644
> > --- a/drivers/gpu/drm/Kconfig
> > +++ b/drivers/gpu/drm/Kconfig
> > @@ -371,6 +371,8 @@ source "drivers/gpu/drm/solomon/Kconfig"
> >
> > source "drivers/gpu/drm/sprd/Kconfig"
> >
> > +source "drivers/gpu/drm/verisilicon/Kconfig"
> > +
> > config DRM_HYPERV
> > tristate "DRM Support for Hyper-V synthetic video device"
> > depends on DRM && PCI && MMU && HYPERV
> > diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> > index a33257d2bc7f..e50622ee4e46 100644
> > --- a/drivers/gpu/drm/Makefile
> > +++ b/drivers/gpu/drm/Makefile
> > @@ -194,3 +194,4 @@ obj-y += gud/
> > obj-$(CONFIG_DRM_HYPERV) += hyperv/
> > obj-y += solomon/
> > obj-$(CONFIG_DRM_SPRD) += sprd/
> > +obj-$(CONFIG_DRM_VERISILICON) += verisilicon/
> > diff --git a/drivers/gpu/drm/verisilicon/Kconfig b/drivers/gpu/drm/verisilicon/Kconfig
> > new file mode 100644
> > index 000000000000..89d12185f73b
> > --- /dev/null
> > +++ b/drivers/gpu/drm/verisilicon/Kconfig
> > @@ -0,0 +1,13 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +config DRM_VERISILICON
> > + tristate "DRM Support for VeriSilicon"
>
> Can you rename the driver and files? 'VeriSilicon' seems
> unpronounceable. Simply 'StarFive' and starfive/ would be fine.

Are you sure you want to request this ? If the display controller is a
Verisilicon design, it will be super odd to use on other SoC that aren't from
StarFive. Think about STM network driver, which is DesignWare.

Nicolas

>
> > + depends on DRM
> > + select DRM_KMS_HELPER
> > + select CMA
> > + select DMA_CMA
> > + help
> > + Choose this option if you have a VeriSilicon soc chipset.
> > + This driver provides VeriSilicon kernel mode
> > + setting and buffer management. It does not
> > + provide 2D or 3D acceleration.
> > diff --git a/drivers/gpu/drm/verisilicon/Makefile b/drivers/gpu/drm/verisilicon/Makefile
> > new file mode 100644
> > index 000000000000..64ce1b26546c
> > --- /dev/null
> > +++ b/drivers/gpu/drm/verisilicon/Makefile
> > @@ -0,0 +1,6 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +
> > +vs_drm-objs := vs_drv.o
> > +
> > +obj-$(CONFIG_DRM_VERISILICON) += vs_drm.o
> > +
> > diff --git a/drivers/gpu/drm/verisilicon/vs_drv.c b/drivers/gpu/drm/verisilicon/vs_drv.c
> > new file mode 100644
> > index 000000000000..24d333598477
> > --- /dev/null
> > +++ b/drivers/gpu/drm/verisilicon/vs_drv.c
> > @@ -0,0 +1,284 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
> > + */
> > +
> > +#include <linux/clk.h>
> > +#include <linux/component.h>
> > +#include <linux/delay.h>
> > +#include <linux/dma-mapping.h>
> > +#include <linux/iommu.h>
> > +#include <linux/of_graph.h>
> > +#include <linux/of_reserved_mem.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/reset.h>
> > +#include <linux/version.h>
> > +
> > +#include <drm/drm_aperture.h>
> > +#include <drm/drm_crtc.h>
> > +#include <drm/drm_crtc_helper.h>
> > +#include <drm/drm_debugfs.h>
> > +#include <drm/drm_drv.h>
> > +#include <drm/drm_fb_helper.h>
> > +#include <drm/drm_fbdev_generic.h>
> > +#include <drm/drm_file.h>
> > +#include <drm/drm_fourcc.h>
> > +#include <drm/drm_ioctl.h>
> > +#include <drm/drm_of.h>
> > +#include <drm/drm_prime.h>
> > +#include <drm/drm_probe_helper.h>
> > +#include <drm/drm_vblank.h>
> > +
> > +#include "vs_drv.h"
> > +
> > +#define DRV_NAME "starfive"
> > +#define DRV_DESC "Starfive DRM driver"
> > +#define DRV_DATE "202305161"
> > +#define DRV_MAJOR 1
> > +#define DRV_MINOR 0
> > +
> > +static struct platform_driver vs_drm_platform_driver;
> > +
> > +static const struct file_operations fops = {
> > + .owner = THIS_MODULE,
> > + .open = drm_open,
> > + .release = drm_release,
> > + .unlocked_ioctl = drm_ioctl,
> > + .compat_ioctl = drm_compat_ioctl,
> > + .poll = drm_poll,
> > + .read = drm_read,
> > +};
> > +
> > +static struct drm_driver vs_drm_driver = {
> > + .driver_features = DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
> > + .lastclose = drm_fb_helper_lastclose,
> > + .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> > + .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> > + .fops = &fops,
> > + .name = DRV_NAME,
> > + .desc = DRV_DESC,
> > + .date = DRV_DATE,
> > + .major = DRV_MAJOR,
> > + .minor = DRV_MINOR,
> > +};
> > +
> > +void vs_drm_update_pitch_alignment(struct drm_device *drm_dev,
> > + unsigned int alignment)
> > +{
> > + struct vs_drm_private *priv = drm_dev->dev_private;
> > +
> > + if (alignment > priv->pitch_alignment)
> > + priv->pitch_alignment = alignment;
> > +}
> > +
> > +static int vs_drm_bind(struct device *dev)
> > +{
> > + struct drm_device *drm_dev;
> > + struct vs_drm_private *priv;
> > + int ret;
> > + static u64 dma_mask = DMA_BIT_MASK(40);
> > +
> > + /* Remove existing drivers that may own the framebuffer memory. */
> > + ret = drm_aperture_remove_framebuffers(false, &vs_drm_driver);
> > + if (ret) {
> > + DRM_DEV_ERROR(dev,
>
> drm_err(), drm_info(), drm_warn(), etc. Here and everwhere else. The
> DRM_DEV_*() print macros are obsolete.
>
> > + "Failed to remove existing framebuffers - %d.\n",
> > + ret);
> > + return ret;
> > + }
> > +
> > + drm_dev = drm_dev_alloc(&vs_drm_driver, dev);
> > + if (IS_ERR(drm_dev))
> > + return PTR_ERR(drm_dev);
> > +
> > + dev_set_drvdata(dev, drm_dev);
> > +
> > + priv = devm_kzalloc(drm_dev->dev, sizeof(struct vs_drm_private),
> > + GFP_KERNEL);
> > + if (!priv) {
> > + ret = -ENOMEM;
> > + goto err_put_dev;
> > + }
> > +
> > + priv->pitch_alignment = 64;
> > + priv->dma_dev = drm_dev->dev;
> > + priv->dma_dev->coherent_dma_mask = dma_mask;
> > + drm_dev->dev_private = priv;
>
> dev_private is obsolete and about to go away at some point.
>
> Please embed drm_device in vs_drm_private and allocate the memory with
> devm_drm_dev_alloc().
>
> > +
> > + drm_mode_config_init(drm_dev);
>
> drmm_mode_config_init() please.
>
> > +
> > + /* Now try and bind all our sub-components */
> > + ret = component_bind_all(dev, drm_dev);
> > + if (ret)
> > + goto err_mode;
> > +
> > + ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
> > + if (ret)
> > + goto err_bind;
> > +
> > + drm_mode_config_reset(drm_dev);
> > +
> > + drm_kms_helper_poll_init(drm_dev);
> > +
> > + ret = drm_dev_register(drm_dev, 0);
> > + if (ret)
> > + goto err_helper;
> > +
> > + drm_fbdev_generic_setup(drm_dev, 32);
> > +
> > + return 0;
> > +
> > +err_helper:
> > + drm_kms_helper_poll_fini(drm_dev);
> > +err_bind:
> > + component_unbind_all(drm_dev->dev, drm_dev);
> > +err_mode:
> > + drm_mode_config_cleanup(drm_dev);
> > + if (priv->domain)
> > + iommu_domain_free(priv->domain);
> > +err_put_dev:
> > + drm_dev->dev_private = NULL;
> > + dev_set_drvdata(dev, NULL);
> > + drm_dev_put(drm_dev);
> > + return ret;
> > +}
> > +
> > +static void vs_drm_unbind(struct device *dev)
> > +{
> > + struct drm_device *drm_dev = dev_get_drvdata(dev);
> > + struct vs_drm_private *priv = drm_dev->dev_private;
> > +
> > + drm_dev_unregister(drm_dev);
> > +
> > + drm_kms_helper_poll_fini(drm_dev);
> > +
> > + component_unbind_all(drm_dev->dev, drm_dev);
> > +
> > + drm_mode_config_cleanup(drm_dev);
> > +
> > + if (priv->domain) {
> > + iommu_domain_free(priv->domain);
> > + priv->domain = NULL;
> > + }
> > +
> > + drm_dev->dev_private = NULL;
> > + dev_set_drvdata(dev, NULL);
> > + drm_dev_put(drm_dev);
>
> You rather want to convert the individual steps of this cleanup to
> managed functions (drmm_ and devm_) to automate the cleanup when as part
> of drm_dev_put().
>
> > +}
> > +
> > +static const struct component_master_ops vs_drm_ops = {
> > + .bind = vs_drm_bind,
> > + .unbind = vs_drm_unbind,
> > +};
> > +
> > +static struct platform_driver *drm_sub_drivers[] = {
> > +};
> > +
> > +#define NUM_DRM_DRIVERS \
> > + (sizeof(drm_sub_drivers) / sizeof(struct platform_driver *))
>
> Does this really work? sizeof(drm_sub_drivers) isn't know at compile
> time. It is always assumed to be 0 AFAICT. Or do you fill this array in
> later patches?
>
>
> > +
> > +static int compare_dev(struct device *dev, void *data)
> > +{
> > + return dev == (struct device *)data;
> > +}
> > +
> > +static struct component_match *vs_drm_match_add(struct device *dev)
> > +{
> > + struct component_match *match = NULL;
> > + int i;
> > +
> > + for (i = 0; i < NUM_DRM_DRIVERS; ++i) {
> > + struct platform_driver *drv = drm_sub_drivers[i];
> > + struct device *p = NULL, *d;
> > +
> > + while ((d = platform_find_device_by_driver(p, &drv->driver))) {
> > + put_device(p);
> > +
> > + component_match_add(dev, &match, compare_dev, d);
> > + p = d;
> > + }
> > + put_device(p);
> > + }
> > +
> > + return match ?: ERR_PTR(-ENODEV);
> > +}
> > +
> > +static int vs_drm_platform_probe(struct platform_device *pdev)
> > +{
> > + struct device *dev = &pdev->dev;
> > + struct component_match *match;
> > +
> > + match = vs_drm_match_add(dev);
> > + if (IS_ERR(match))
> > + return PTR_ERR(match);
> > +
> > + return component_master_add_with_match(dev, &vs_drm_ops, match);
> > +}
> > +
> > +static int vs_drm_platform_remove(struct platform_device *pdev)
> > +{
> > + component_master_del(&pdev->dev, &vs_drm_ops);
> > + return 0;
> > +}
> > +
> > +#ifdef CONFIG_PM_SLEEP
> > +static int vs_drm_suspend(struct device *dev)
> > +{
> > + struct drm_device *drm = dev_get_drvdata(dev);
> > +
> > + return drm_mode_config_helper_suspend(drm);
> > +}
> > +
> > +static int vs_drm_resume(struct device *dev)
> > +{
> > + struct drm_device *drm = dev_get_drvdata(dev);
> > +
> > + return drm_mode_config_helper_resume(drm);
> > +}
> > +#endif
> > +
> > +static SIMPLE_DEV_PM_OPS(vs_drm_pm_ops, vs_drm_suspend, vs_drm_resume);
> > +
> > +static const struct of_device_id vs_drm_dt_ids[] = {
> > + { .compatible = "verisilicon,display-subsystem", },
> > +};
> > +
> > +MODULE_DEVICE_TABLE(of, vs_drm_dt_ids);
> > +
> > +static struct platform_driver vs_drm_platform_driver = {
> > + .probe = vs_drm_platform_probe,
> > + .remove = vs_drm_platform_remove,
> > +
> > + .driver = {
> > + .name = DRV_NAME,
> > + .of_match_table = vs_drm_dt_ids,
> > + .pm = &vs_drm_pm_ops,
> > + },
> > +};
> > +
> > +static int __init vs_drm_init(void)
> > +{
> > + int ret;
> > +
> > + ret = platform_register_drivers(drm_sub_drivers, NUM_DRM_DRIVERS);
> > + if (ret)
> > + return ret;
> > +
> > + ret = platform_driver_register(&vs_drm_platform_driver);
> > + if (ret)
> > + platform_unregister_drivers(drm_sub_drivers, NUM_DRM_DRIVERS);
> > +
> > + return ret;
> > +}
> > +
> > +static void __exit vs_drm_fini(void)
> > +{
> > + platform_driver_unregister(&vs_drm_platform_driver);
> > + platform_unregister_drivers(drm_sub_drivers, NUM_DRM_DRIVERS);
> > +}
> > +
> > +module_init(vs_drm_init);
> > +module_exit(vs_drm_fini);
> > +
> > +MODULE_DESCRIPTION("VeriSilicon DRM Driver");
> > +MODULE_LICENSE("GPL");
> > diff --git a/drivers/gpu/drm/verisilicon/vs_drv.h b/drivers/gpu/drm/verisilicon/vs_drv.h
> > new file mode 100644
> > index 000000000000..0382b44e3bf0
> > --- /dev/null
> > +++ b/drivers/gpu/drm/verisilicon/vs_drv.h
> > @@ -0,0 +1,48 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +/*
> > + * Copyright (C) 2023 VeriSilicon Holdings Co., Ltd.
> > + */
> > +
> > +#ifndef __VS_DRV_H__
> > +#define __VS_DRV_H__
> > +
> > +#include <linux/module.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/version.h>
> > +#include <drm/drm_drv.h>
> > +#include <drm/drm_gem.h>
> > +
> > +/*
> > + *
> > + * @dma_dev: device for DMA API.
> > + * - use the first attached device if support iommu
> > + else use drm device (only contiguous buffer support)
> > + * @domain: iommu domain for DRM.
> > + * - all DC IOMMU share same domain to reduce mapping
> > + * @pitch_alignment: buffer pitch alignment required by sub-devices.
> > + *
> > + */
> > +struct vs_drm_private {
> > + struct device *dma_dev;
> > + struct iommu_domain *domain;
> > + unsigned int pitch_alignment;
> > +};
>
> As mentioned, this struct needs to embed struct drm_device.
>
> > +
> > +void vs_drm_update_pitch_alignment(struct drm_device *drm_dev,
> > + unsigned int alignment);
> > +
> > +static inline struct device *to_dma_dev(struct drm_device *dev)
> > +{
> > + struct vs_drm_private *priv = dev->dev_private;
> > +
> > + return priv->dma_dev;
>
> And this needs to be an upcast via container_of().
>
> > +}
> > +
> > +static inline bool is_iommu_enabled(struct drm_device *dev)
> > +{
> > + struct vs_drm_private *priv = dev->dev_private;
> > +
> > + return priv->domain ? true : false;
> > +}
> > +
> > +#endif /* __VS_DRV_H__ */
> > diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> > index de703c6be969..af4fb50f9207 100644
> > --- a/include/uapi/drm/drm_fourcc.h
> > +++ b/include/uapi/drm/drm_fourcc.h
>
> The UAPI changes shouldn't be needed in this patch?
>
> > @@ -419,6 +419,7 @@ extern "C" {
> > #define DRM_FORMAT_MOD_VENDOR_ARM 0x08
> > #define DRM_FORMAT_MOD_VENDOR_ALLWINNER 0x09
> > #define DRM_FORMAT_MOD_VENDOR_AMLOGIC 0x0a
> > +#define DRM_FORMAT_MOD_VENDOR_VS 0x0b
> >
> > /* add more to the end as needed */
> >
> > @@ -1519,6 +1520,88 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier)
> > #define AMD_FMT_MOD_CLEAR(field) \
> > (~((__u64)AMD_FMT_MOD_##field##_MASK << AMD_FMT_MOD_##field##_SHIFT))
> >
> > +#define DRM_FORMAT_MOD_VS_TYPE_NORMAL 0x00
> > +#define DRM_FORMAT_MOD_VS_TYPE_COMPRESSED 0x01
> > +#define DRM_FORMAT_MOD_VS_TYPE_CUSTOM_10BIT 0x02
> > +#define DRM_FORMAT_MOD_VS_TYPE_MASK ((__u64)0x3 << 54)
> > +
> > +#define fourcc_mod_vs_code(type, val) \
> > + fourcc_mod_code(VS, ((((__u64)type) << 54) | (val)))
> > +
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_MODE_MASK 0x3F
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_8X8_XMAJOR 0x00
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_8X8_YMAJOR 0x01
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_16X4 0x02
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_8X4 0x03
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_4X8 0x04
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_16X4 0x06
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_64X4 0x07
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_32X4 0x08
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_256X1 0x09
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_128X1 0x0A
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_64X4 0x0B
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_256X2 0x0C
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_128X2 0x0D
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_128X4 0x0E
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_64X1 0x0F
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_16X8 0x10
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_8X16 0x11
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_512X1 0x12
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_32X4 0x13
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_64X2 0x14
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_32X2 0x15
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_32X1 0x16
> > +#define DRM_FORMAT_MOD_VS_DEC_RASTER_16X1 0x17
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_128X4 0x18
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_256X4 0x19
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_512X4 0x1A
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_16X16 0x1B
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_32X16 0x1C
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_64X16 0x1D
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_128X8 0x1E
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_8X4_S 0x1F
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_16X4_S 0x20
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_32X4_S 0x21
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_16X4_LSB 0x22
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_32X4_LSB 0x23
> > +#define DRM_FORMAT_MOD_VS_DEC_TILE_32X8 0x24
> > +
> > +#define DRM_FORMAT_MOD_VS_DEC_ALIGN_32 (0x01 << 6)
> > +#define DRM_FORMAT_MOD_VS_DEC_ALIGN_64 (0x01 << 7)
> > +
> > +#define fourcc_mod_vs_dec_code(tile, align) \
> > + fourcc_mod_vs_code(DRM_FORMAT_MOD_VS_TYPE_COMPRESSED, \
> > + ((tile) | (align)))
> > +
> > +#define DRM_FORMAT_MOD_VS_NORM_MODE_MASK 0x1F
> > +#define DRM_FORMAT_MOD_VS_LINEAR 0x00
> > +#define DRM_FORMAT_MOD_VS_TILED4x4 0x01
> > +#define DRM_FORMAT_MOD_VS_SUPER_TILED_XMAJOR 0x02
> > +#define DRM_FORMAT_MOD_VS_SUPER_TILED_YMAJOR 0x03
> > +#define DRM_FORMAT_MOD_VS_TILE_8X8 0x04
> > +#define DRM_FORMAT_MOD_VS_TILE_MODE1 0x05
> > +#define DRM_FORMAT_MOD_VS_TILE_MODE2 0x06
> > +#define DRM_FORMAT_MOD_VS_TILE_8X4 0x07
> > +#define DRM_FORMAT_MOD_VS_TILE_MODE4 0x08
> > +#define DRM_FORMAT_MOD_VS_TILE_MODE5 0x09
> > +#define DRM_FORMAT_MOD_VS_TILE_MODE6 0x0A
> > +#define DRM_FORMAT_MOD_VS_SUPER_TILED_XMAJOR_8X4 0x0B
> > +#define DRM_FORMAT_MOD_VS_SUPER_TILED_YMAJOR_4X8 0x0C
> > +#define DRM_FORMAT_MOD_VS_TILE_Y 0x0D
> > +#define DRM_FORMAT_MOD_VS_TILE_128X1 0x0F
> > +#define DRM_FORMAT_MOD_VS_TILE_256X1 0x10
> > +#define DRM_FORMAT_MOD_VS_TILE_32X1 0x11
> > +#define DRM_FORMAT_MOD_VS_TILE_64X1 0x12
> > +#define DRM_FORMAT_MOD_VS_TILE_MODE4X4 0x15
> > +
> > +#define fourcc_mod_vs_norm_code(tile) \
> > + fourcc_mod_vs_code(DRM_FORMAT_MOD_VS_TYPE_NORMAL, \
> > + (tile))
> > +
> > +#define fourcc_mod_vs_custom_code(tile) \
> > + fourcc_mod_vs_code(DRM_FORMAT_MOD_VS_TYPE_CUSTOM_10BIT, \
> > + (tile))
> > +
> > #if defined(__cplusplus)
> > }
> > #endif
> > diff --git a/include/uapi/drm/vs_drm.h b/include/uapi/drm/vs_drm.h
> > new file mode 100644
> > index 000000000000..96b7fc95d658
> > --- /dev/null
> > +++ b/include/uapi/drm/vs_drm.h
>
> Another UAPI addition that appears to be unused. Please only add things
> that you're using.
>
> Best regards
> Thomas
>
> > @@ -0,0 +1,50 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
> > +/*
> > + * Copyright (C) 2020 VeriSilicon Holdings Co., Ltd.
> > + */
> > +
> > +#ifndef __VS_DRM_H__
> > +#define __VS_DRM_H__
> > +
> > +#include "drm.h"
> > +
> > +enum drm_vs_degamma_mode {
> > + VS_DEGAMMA_DISABLE = 0,
> > + VS_DEGAMMA_BT709 = 1,
> > + VS_DEGAMMA_BT2020 = 2,
> > +};
> > +
> > +enum drm_vs_sync_dc_mode {
> > + VS_SINGLE_DC = 0,
> > + VS_MULTI_DC_PRIMARY = 1,
> > + VS_MULTI_DC_SECONDARY = 2,
> > +};
> > +
> > +enum drm_vs_mmu_prefetch_mode {
> > + VS_MMU_PREFETCH_DISABLE = 0,
> > + VS_MMU_PREFETCH_ENABLE = 1,
> > +};
> > +
> > +struct drm_vs_watermark {
> > + __u32 watermark;
> > + __u8 qos_low;
> > + __u8 qos_high;
> > +};
> > +
> > +struct drm_vs_color_mgmt {
> > + __u32 colorkey;
> > + __u32 colorkey_high;
> > + __u32 clear_value;
> > + bool clear_enable;
> > + bool transparency;
> > +};
> > +
> > +struct drm_vs_roi {
> > + bool enable;
> > + __u16 roi_x;
> > + __u16 roi_y;
> > + __u16 roi_w;
> > + __u16 roi_h;
> > +};
> > +
> > +#endif /* __VS_DRM_H__ */
>
> --
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Frankenstrasse 146, 90461 Nuernberg, Germany
> GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
> HRB 36809 (AG Nuernberg)

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