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Date: Fri, 29 Oct 2021 21:00:08 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: John Keeping <john@...anate.com>, dri-devel@...ts.freedesktop.org
Cc: Sandy Huang <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH] drm/rockchip: use generic fbdev setup
Hi
Am 29.10.21 um 13:50 schrieb John Keeping:
> The Rockchip fbdev code does not add anything compared to
> drm_fbdev_generic_setup(); the one custom function for .fb_mmap does the
> same thing as gem_prime_mmap which is called by the helper.
>
> Signed-off-by: John Keeping <john@...anate.com>
> ---
> drivers/gpu/drm/rockchip/Makefile | 1 -
> drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 10 +-
> drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 2 -
> drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c | 164 ------------------
> drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h | 24 ---
> 5 files changed, 2 insertions(+), 199 deletions(-)
> delete mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
> delete mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h
>
> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile
> index 17a9e7eb2130..1a56f696558c 100644
> --- a/drivers/gpu/drm/rockchip/Makefile
> +++ b/drivers/gpu/drm/rockchip/Makefile
> @@ -5,7 +5,6 @@
>
> rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \
> rockchip_drm_gem.o rockchip_drm_vop.o rockchip_vop_reg.o
> -rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o
>
> rockchipdrm-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o
> rockchipdrm-$(CONFIG_ROCKCHIP_CDN_DP) += cdn-dp-core.o cdn-dp-reg.o
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index 69c699459dce..20d81ae69828 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -26,7 +26,6 @@
>
> #include "rockchip_drm_drv.h"
> #include "rockchip_drm_fb.h"
> -#include "rockchip_drm_fbdev.h"
> #include "rockchip_drm_gem.h"
>
> #define DRIVER_NAME "rockchip"
> @@ -159,10 +158,6 @@ static int rockchip_drm_bind(struct device *dev)
>
> drm_mode_config_reset(drm_dev);
>
> - ret = rockchip_drm_fbdev_init(drm_dev);
> - if (ret)
> - goto err_unbind_all;
> -
> /* init kms poll for handling hpd */
> drm_kms_helper_poll_init(drm_dev);
>
> @@ -170,10 +165,11 @@ static int rockchip_drm_bind(struct device *dev)
> if (ret)
> goto err_kms_helper_poll_fini;
>
> + drm_fbdev_generic_setup(drm_dev, 32);
Please pass 0 for the final argument. The fbdev helpers pick 32 by
default. Maybe leave a comment if you require 32 here.
For RGB colors, you should rather set
drm_device.mode_config.preferred_depth to 24 instead.
With these changes:
Acked-by: Thomas Zimmermann <tzimmermann@...e.de>
Best regards
Thomas
> +
> return 0;
> err_kms_helper_poll_fini:
> drm_kms_helper_poll_fini(drm_dev);
> - rockchip_drm_fbdev_fini(drm_dev);
> err_unbind_all:
> component_unbind_all(dev, drm_dev);
> err_iommu_cleanup:
> @@ -189,7 +185,6 @@ static void rockchip_drm_unbind(struct device *dev)
>
> drm_dev_unregister(drm_dev);
>
> - rockchip_drm_fbdev_fini(drm_dev);
> drm_kms_helper_poll_fini(drm_dev);
>
> drm_atomic_helper_shutdown(drm_dev);
> @@ -203,7 +198,6 @@ DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);
>
> static const struct drm_driver rockchip_drm_driver = {
> .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
> - .lastclose = drm_fb_helper_lastclose,
> .dumb_create = rockchip_gem_dumb_create,
> .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> index aa0909e8edf9..143a48330f84 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
> @@ -43,8 +43,6 @@ struct rockchip_crtc_state {
> * @mm_lock: protect drm_mm on multi-threads.
> */
> struct rockchip_drm_private {
> - struct drm_fb_helper fbdev_helper;
> - struct drm_gem_object *fbdev_bo;
> struct iommu_domain *domain;
> struct mutex mm_lock;
> struct drm_mm mm;
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c b/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
> deleted file mode 100644
> index d8418dd39d0e..000000000000
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c
> +++ /dev/null
> @@ -1,164 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-only
> -/*
> - * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
> - * Author:Mark Yao <mark.yao@...k-chips.com>
> - */
> -
> -#include <drm/drm.h>
> -#include <drm/drm_fb_helper.h>
> -#include <drm/drm_fourcc.h>
> -#include <drm/drm_prime.h>
> -#include <drm/drm_probe_helper.h>
> -
> -#include "rockchip_drm_drv.h"
> -#include "rockchip_drm_gem.h"
> -#include "rockchip_drm_fb.h"
> -#include "rockchip_drm_fbdev.h"
> -
> -#define PREFERRED_BPP 32
> -#define to_drm_private(x) \
> - container_of(x, struct rockchip_drm_private, fbdev_helper)
> -
> -static int rockchip_fbdev_mmap(struct fb_info *info,
> - struct vm_area_struct *vma)
> -{
> - struct drm_fb_helper *helper = info->par;
> - struct rockchip_drm_private *private = to_drm_private(helper);
> -
> - return drm_gem_prime_mmap(private->fbdev_bo, vma);
> -}
> -
> -static const struct fb_ops rockchip_drm_fbdev_ops = {
> - .owner = THIS_MODULE,
> - DRM_FB_HELPER_DEFAULT_OPS,
> - .fb_mmap = rockchip_fbdev_mmap,
> - .fb_fillrect = drm_fb_helper_cfb_fillrect,
> - .fb_copyarea = drm_fb_helper_cfb_copyarea,
> - .fb_imageblit = drm_fb_helper_cfb_imageblit,
> -};
> -
> -static int rockchip_drm_fbdev_create(struct drm_fb_helper *helper,
> - struct drm_fb_helper_surface_size *sizes)
> -{
> - struct rockchip_drm_private *private = to_drm_private(helper);
> - struct drm_mode_fb_cmd2 mode_cmd = { 0 };
> - struct drm_device *dev = helper->dev;
> - struct rockchip_gem_object *rk_obj;
> - struct drm_framebuffer *fb;
> - unsigned int bytes_per_pixel;
> - unsigned long offset;
> - struct fb_info *fbi;
> - size_t size;
> - int ret;
> -
> - bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8);
> -
> - mode_cmd.width = sizes->surface_width;
> - mode_cmd.height = sizes->surface_height;
> - mode_cmd.pitches[0] = sizes->surface_width * bytes_per_pixel;
> - mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
> - sizes->surface_depth);
> -
> - size = mode_cmd.pitches[0] * mode_cmd.height;
> -
> - rk_obj = rockchip_gem_create_object(dev, size, true);
> - if (IS_ERR(rk_obj))
> - return -ENOMEM;
> -
> - private->fbdev_bo = &rk_obj->base;
> -
> - fbi = drm_fb_helper_alloc_fbi(helper);
> - if (IS_ERR(fbi)) {
> - DRM_DEV_ERROR(dev->dev, "Failed to create framebuffer info.\n");
> - ret = PTR_ERR(fbi);
> - goto out;
> - }
> -
> - helper->fb = rockchip_drm_framebuffer_init(dev, &mode_cmd,
> - private->fbdev_bo);
> - if (IS_ERR(helper->fb)) {
> - DRM_DEV_ERROR(dev->dev,
> - "Failed to allocate DRM framebuffer.\n");
> - ret = PTR_ERR(helper->fb);
> - goto out;
> - }
> -
> - fbi->fbops = &rockchip_drm_fbdev_ops;
> -
> - fb = helper->fb;
> - drm_fb_helper_fill_info(fbi, helper, sizes);
> -
> - offset = fbi->var.xoffset * bytes_per_pixel;
> - offset += fbi->var.yoffset * fb->pitches[0];
> -
> - dev->mode_config.fb_base = 0;
> - fbi->screen_base = rk_obj->kvaddr + offset;
> - fbi->screen_size = rk_obj->base.size;
> - fbi->fix.smem_len = rk_obj->base.size;
> -
> - DRM_DEBUG_KMS("FB [%dx%d]-%d kvaddr=%p offset=%ld size=%zu\n",
> - fb->width, fb->height, fb->format->depth,
> - rk_obj->kvaddr,
> - offset, size);
> -
> - return 0;
> -
> -out:
> - rockchip_gem_free_object(&rk_obj->base);
> - return ret;
> -}
> -
> -static const struct drm_fb_helper_funcs rockchip_drm_fb_helper_funcs = {
> - .fb_probe = rockchip_drm_fbdev_create,
> -};
> -
> -int rockchip_drm_fbdev_init(struct drm_device *dev)
> -{
> - struct rockchip_drm_private *private = dev->dev_private;
> - struct drm_fb_helper *helper;
> - int ret;
> -
> - if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
> - return -EINVAL;
> -
> - helper = &private->fbdev_helper;
> -
> - drm_fb_helper_prepare(dev, helper, &rockchip_drm_fb_helper_funcs);
> -
> - ret = drm_fb_helper_init(dev, helper);
> - if (ret < 0) {
> - DRM_DEV_ERROR(dev->dev,
> - "Failed to initialize drm fb helper - %d.\n",
> - ret);
> - return ret;
> - }
> -
> - ret = drm_fb_helper_initial_config(helper, PREFERRED_BPP);
> - if (ret < 0) {
> - DRM_DEV_ERROR(dev->dev,
> - "Failed to set initial hw config - %d.\n",
> - ret);
> - goto err_drm_fb_helper_fini;
> - }
> -
> - return 0;
> -
> -err_drm_fb_helper_fini:
> - drm_fb_helper_fini(helper);
> - return ret;
> -}
> -
> -void rockchip_drm_fbdev_fini(struct drm_device *dev)
> -{
> - struct rockchip_drm_private *private = dev->dev_private;
> - struct drm_fb_helper *helper;
> -
> - helper = &private->fbdev_helper;
> -
> - drm_fb_helper_unregister_fbi(helper);
> -
> - if (helper->fb)
> - drm_framebuffer_put(helper->fb);
> -
> - drm_fb_helper_fini(helper);
> -}
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h b/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h
> deleted file mode 100644
> index 5fb7ac2371a8..000000000000
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.h
> +++ /dev/null
> @@ -1,24 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0-only */
> -/*
> - * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
> - * Author:Mark Yao <mark.yao@...k-chips.com>
> - */
> -
> -#ifndef _ROCKCHIP_DRM_FBDEV_H
> -#define _ROCKCHIP_DRM_FBDEV_H
> -
> -#ifdef CONFIG_DRM_FBDEV_EMULATION
> -int rockchip_drm_fbdev_init(struct drm_device *dev);
> -void rockchip_drm_fbdev_fini(struct drm_device *dev);
> -#else
> -static inline int rockchip_drm_fbdev_init(struct drm_device *dev)
> -{
> - return 0;
> -}
> -
> -static inline void rockchip_drm_fbdev_fini(struct drm_device *dev)
> -{
> -}
> -#endif
> -
> -#endif /* _ROCKCHIP_DRM_FBDEV_H */
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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