[PATCH 1/4] drm/hisilicon/hibmc: Switch to generic fbdev emulation
Daniel Vetter
daniel at ffwll.ch
Mon Nov 25 09:08:15 UTC 2019
On Fri, Nov 22, 2019 at 09:30:41AM +0100, Thomas Zimmermann wrote:
> There's nothing special about hibmc's fbdev emulation that is not
> provided by the generic implementation. Switch over and remove the
> driver's code.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
> ---
> drivers/gpu/drm/hisilicon/hibmc/Makefile | 2 +-
> .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 5 +-
> .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 11 -
> .../gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c | 240 ------------------
> 4 files changed, 3 insertions(+), 255 deletions(-)
> delete mode 100644 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
>
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/Makefile b/drivers/gpu/drm/hisilicon/hibmc/Makefile
> index 0c2d4296bccd..f99132715597 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/Makefile
> +++ b/drivers/gpu/drm/hisilicon/hibmc/Makefile
> @@ -1,4 +1,4 @@
> # SPDX-License-Identifier: GPL-2.0-only
> -hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_drm_fbdev.o hibmc_ttm.o
> +hibmc-drm-y := hibmc_drm_drv.o hibmc_drm_de.o hibmc_drm_vdac.o hibmc_ttm.o
>
> obj-$(CONFIG_DRM_HISI_HIBMC) += hibmc-drm.o
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> index 2fd4ca91a62d..113d27b8a8f1 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
> @@ -17,6 +17,7 @@
>
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_drv.h>
> +#include <drm/drm_fb_helper.h>
> #include <drm/drm_gem_vram_helper.h>
> #include <drm/drm_irq.h>
> #include <drm/drm_print.h>
> @@ -247,8 +248,6 @@ static int hibmc_unload(struct drm_device *dev)
> {
> struct hibmc_drm_private *priv = dev->dev_private;
>
> - hibmc_fbdev_fini(priv);
> -
> drm_atomic_helper_shutdown(dev);
>
> if (dev->irq_enabled)
> @@ -307,7 +306,7 @@ static int hibmc_load(struct drm_device *dev)
> /* reset all the states of crtc/plane/encoder/connector */
> drm_mode_config_reset(dev);
>
> - ret = hibmc_fbdev_init(priv);
> + ret = drm_fbdev_generic_setup(dev, 16);
Nice, +1 line, -lots of lines!
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> if (ret) {
> DRM_ERROR("failed to initialize fbdev: %d\n", ret);
> goto err;
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> index e58ecd7edcf8..b34493ead30b 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> @@ -25,12 +25,6 @@ struct hibmc_framebuffer {
> struct drm_gem_object *obj;
> };
>
> -struct hibmc_fbdev {
> - struct drm_fb_helper helper; /* must be first */
> - struct hibmc_framebuffer *fb;
> - int size;
> -};
> -
> struct hibmc_drm_private {
> /* hw */
> void __iomem *mmio;
> @@ -42,9 +36,6 @@ struct hibmc_drm_private {
> /* drm */
> struct drm_device *dev;
> bool mode_config_initialized;
> -
> - /* fbdev */
> - struct hibmc_fbdev *fbdev;
> };
>
> #define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
> @@ -56,8 +47,6 @@ void hibmc_set_current_gate(struct hibmc_drm_private *priv,
>
> int hibmc_de_init(struct hibmc_drm_private *priv);
> int hibmc_vdac_init(struct hibmc_drm_private *priv);
> -int hibmc_fbdev_init(struct hibmc_drm_private *priv);
> -void hibmc_fbdev_fini(struct hibmc_drm_private *priv);
>
> int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
> struct drm_gem_object **obj);
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
> deleted file mode 100644
> index b4c1cea051e8..000000000000
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
> +++ /dev/null
> @@ -1,240 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0-or-later
> -/* Hisilicon Hibmc SoC drm driver
> - *
> - * Based on the bochs drm driver.
> - *
> - * Copyright (c) 2016 Huawei Limited.
> - *
> - * Author:
> - * Rongrong Zou <zourongrong at huawei.com>
> - * Rongrong Zou <zourongrong at gmail.com>
> - * Jianhua Li <lijianhua at huawei.com>
> - */
> -
> -#include <drm/drm_crtc.h>
> -#include <drm/drm_fb_helper.h>
> -#include <drm/drm_fourcc.h>
> -#include <drm/drm_gem_vram_helper.h>
> -#include <drm/drm_probe_helper.h>
> -
> -#include "hibmc_drm_drv.h"
> -
> -static int hibmcfb_create_object(
> - struct hibmc_drm_private *priv,
> - const struct drm_mode_fb_cmd2 *mode_cmd,
> - struct drm_gem_object **gobj_p)
> -{
> - struct drm_gem_object *gobj;
> - struct drm_device *dev = priv->dev;
> - u32 size;
> - int ret = 0;
> -
> - size = mode_cmd->pitches[0] * mode_cmd->height;
> - ret = hibmc_gem_create(dev, size, true, &gobj);
> - if (ret)
> - return ret;
> -
> - *gobj_p = gobj;
> - return ret;
> -}
> -
> -static struct fb_ops hibmc_drm_fb_ops = {
> - .owner = THIS_MODULE,
> - .fb_check_var = drm_fb_helper_check_var,
> - .fb_set_par = drm_fb_helper_set_par,
> - .fb_fillrect = drm_fb_helper_sys_fillrect,
> - .fb_copyarea = drm_fb_helper_sys_copyarea,
> - .fb_imageblit = drm_fb_helper_sys_imageblit,
> - .fb_pan_display = drm_fb_helper_pan_display,
> - .fb_blank = drm_fb_helper_blank,
> - .fb_setcmap = drm_fb_helper_setcmap,
> -};
> -
> -static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
> - struct drm_fb_helper_surface_size *sizes)
> -{
> - struct hibmc_fbdev *hi_fbdev =
> - container_of(helper, struct hibmc_fbdev, helper);
> - struct hibmc_drm_private *priv = helper->dev->dev_private;
> - struct fb_info *info;
> - struct drm_mode_fb_cmd2 mode_cmd;
> - struct drm_gem_object *gobj = NULL;
> - int ret = 0;
> - size_t size;
> - unsigned int bytes_per_pixel;
> - struct drm_gem_vram_object *gbo = NULL;
> - void *base;
> -
> - DRM_DEBUG_DRIVER("surface width(%d), height(%d) and bpp(%d)\n",
> - sizes->surface_width, sizes->surface_height,
> - sizes->surface_bpp);
> -
> - 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] = mode_cmd.width * bytes_per_pixel;
> - mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
> - sizes->surface_depth);
> -
> - size = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height);
> -
> - ret = hibmcfb_create_object(priv, &mode_cmd, &gobj);
> - if (ret) {
> - DRM_ERROR("failed to create fbcon backing object: %d\n", ret);
> - return -ENOMEM;
> - }
> -
> - gbo = drm_gem_vram_of_gem(gobj);
> -
> - ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
> - if (ret) {
> - DRM_ERROR("failed to pin fbcon: %d\n", ret);
> - goto out_unref_gem;
> - }
> -
> - base = drm_gem_vram_kmap(gbo, true, NULL);
> - if (IS_ERR(base)) {
> - ret = PTR_ERR(base);
> - DRM_ERROR("failed to kmap fbcon: %d\n", ret);
> - goto out_unpin_bo;
> - }
> -
> - info = drm_fb_helper_alloc_fbi(helper);
> - if (IS_ERR(info)) {
> - ret = PTR_ERR(info);
> - DRM_ERROR("failed to allocate fbi: %d\n", ret);
> - goto out_release_fbi;
> - }
> -
> - hi_fbdev->fb = hibmc_framebuffer_init(priv->dev, &mode_cmd, gobj);
> - if (IS_ERR(hi_fbdev->fb)) {
> - ret = PTR_ERR(hi_fbdev->fb);
> - hi_fbdev->fb = NULL;
> - DRM_ERROR("failed to initialize framebuffer: %d\n", ret);
> - goto out_release_fbi;
> - }
> -
> - priv->fbdev->size = size;
> - hi_fbdev->helper.fb = &hi_fbdev->fb->fb;
> -
> - info->fbops = &hibmc_drm_fb_ops;
> -
> - drm_fb_helper_fill_info(info, &priv->fbdev->helper, sizes);
> -
> - info->screen_base = base;
> - info->screen_size = size;
> -
> - info->fix.smem_start = gbo->bo.mem.bus.offset + gbo->bo.mem.bus.base;
> - info->fix.smem_len = size;
> - return 0;
> -
> -out_release_fbi:
> - drm_gem_vram_kunmap(gbo);
> -out_unpin_bo:
> - drm_gem_vram_unpin(gbo);
> -out_unref_gem:
> - drm_gem_object_put_unlocked(gobj);
> -
> - return ret;
> -}
> -
> -static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
> -{
> - struct hibmc_framebuffer *gfb = fbdev->fb;
> - struct drm_fb_helper *fbh = &fbdev->helper;
> -
> - drm_fb_helper_unregister_fbi(fbh);
> -
> - drm_fb_helper_fini(fbh);
> -
> - if (gfb)
> - drm_framebuffer_put(&gfb->fb);
> -}
> -
> -static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
> - .fb_probe = hibmc_drm_fb_create,
> -};
> -
> -int hibmc_fbdev_init(struct hibmc_drm_private *priv)
> -{
> - int ret;
> - struct fb_var_screeninfo *var;
> - struct fb_fix_screeninfo *fix;
> - struct hibmc_fbdev *hifbdev;
> -
> - hifbdev = devm_kzalloc(priv->dev->dev, sizeof(*hifbdev), GFP_KERNEL);
> - if (!hifbdev) {
> - DRM_ERROR("failed to allocate hibmc_fbdev\n");
> - return -ENOMEM;
> - }
> -
> - priv->fbdev = hifbdev;
> - drm_fb_helper_prepare(priv->dev, &hifbdev->helper,
> - &hibmc_fbdev_helper_funcs);
> -
> - /* Now just one crtc and one channel */
> - ret = drm_fb_helper_init(priv->dev, &hifbdev->helper, 1);
> - if (ret) {
> - DRM_ERROR("failed to initialize fb helper: %d\n", ret);
> - return ret;
> - }
> -
> - ret = drm_fb_helper_single_add_all_connectors(&hifbdev->helper);
> - if (ret) {
> - DRM_ERROR("failed to add all connectors: %d\n", ret);
> - goto fini;
> - }
> -
> - ret = drm_fb_helper_initial_config(&hifbdev->helper, 16);
> - if (ret) {
> - DRM_ERROR("failed to setup initial conn config: %d\n", ret);
> - goto fini;
> - }
> -
> - var = &hifbdev->helper.fbdev->var;
> - fix = &hifbdev->helper.fbdev->fix;
> -
> - DRM_DEBUG_DRIVER("Member of info->var is :\n"
> - "xres=%d\n"
> - "yres=%d\n"
> - "xres_virtual=%d\n"
> - "yres_virtual=%d\n"
> - "xoffset=%d\n"
> - "yoffset=%d\n"
> - "bits_per_pixel=%d\n"
> - "...\n", var->xres, var->yres, var->xres_virtual,
> - var->yres_virtual, var->xoffset, var->yoffset,
> - var->bits_per_pixel);
> - DRM_DEBUG_DRIVER("Member of info->fix is :\n"
> - "smem_start=%lx\n"
> - "smem_len=%d\n"
> - "type=%d\n"
> - "type_aux=%d\n"
> - "visual=%d\n"
> - "xpanstep=%d\n"
> - "ypanstep=%d\n"
> - "ywrapstep=%d\n"
> - "line_length=%d\n"
> - "accel=%d\n"
> - "capabilities=%d\n"
> - "...\n", fix->smem_start, fix->smem_len, fix->type,
> - fix->type_aux, fix->visual, fix->xpanstep,
> - fix->ypanstep, fix->ywrapstep, fix->line_length,
> - fix->accel, fix->capabilities);
> -
> - return 0;
> -
> -fini:
> - drm_fb_helper_fini(&hifbdev->helper);
> - return ret;
> -}
> -
> -void hibmc_fbdev_fini(struct hibmc_drm_private *priv)
> -{
> - if (!priv->fbdev)
> - return;
> -
> - hibmc_fbdev_destroy(priv->fbdev);
> - priv->fbdev = NULL;
> -}
> --
> 2.23.0
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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