Hi, Ulrich: On Fri, 2017-09-29 at 15:09 +0200, Ulrich Hecht wrote: > Forward-ported from chromeos-3.18 vendor kernel. > > Signed-off-by: Ulrich Hecht <ulrich.hecht+rene...@gmail.com>
I think this patch originate from [1]. And you should keep the signed-off-by info so that we could know who contribute to this patch. [1] https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/330532 Regards, CK > --- > drivers/gpu/drm/mediatek/Makefile | 2 + > drivers/gpu/drm/mediatek/mtk_drm_drv.c | 9 ++ > drivers/gpu/drm/mediatek/mtk_drm_drv.h | 4 +- > drivers/gpu/drm/mediatek/mtk_drm_fb.c | 13 +++ > drivers/gpu/drm/mediatek/mtk_drm_fb.h | 3 + > drivers/gpu/drm/mediatek/mtk_drm_fbdev.c | 184 > +++++++++++++++++++++++++++++++ > drivers/gpu/drm/mediatek/mtk_drm_fbdev.h | 32 ++++++ > 7 files changed, 246 insertions(+), 1 deletion(-) > create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_fbdev.c > create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_fbdev.h > > diff --git a/drivers/gpu/drm/mediatek/Makefile > b/drivers/gpu/drm/mediatek/Makefile > index e37b55a..8306fb5 100644 > --- a/drivers/gpu/drm/mediatek/Makefile > +++ b/drivers/gpu/drm/mediatek/Makefile > @@ -12,6 +12,8 @@ mediatek-drm-y := mtk_disp_color.o \ > mtk_mipi_tx.o \ > mtk_dpi.o > > +mediatek-drm-$(CONFIG_DRM_FBDEV_EMULATION) += mtk_drm_fbdev.o > + > obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o > > mediatek-drm-hdmi-objs := mtk_cec.o \ > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c > b/drivers/gpu/drm/mediatek/mtk_drm_drv.c > index 8c92630..a69aa2f 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c > @@ -30,6 +30,7 @@ > #include "mtk_drm_ddp_comp.h" > #include "mtk_drm_drv.h" > #include "mtk_drm_fb.h" > +#include "mtk_drm_fbdev.h" > #include "mtk_drm_gem.h" > > #define DRIVER_NAME "mediatek" > @@ -257,8 +258,15 @@ static int mtk_drm_kms_init(struct drm_device *drm) > drm_kms_helper_poll_init(drm); > drm_mode_config_reset(drm); > > + ret = mtk_fbdev_init(drm); > + if (ret) > + goto err_kms_helper_poll_fini; > + > return 0; > > +err_kms_helper_poll_fini: > + drm_kms_helper_poll_fini(drm); > +// drm_vblank_cleanup(drm); > err_component_unbind: > component_unbind_all(drm->dev, drm); > err_config_cleanup: > @@ -269,6 +277,7 @@ static int mtk_drm_kms_init(struct drm_device *drm) > > static void mtk_drm_kms_deinit(struct drm_device *drm) > { > + mtk_fbdev_fini(drm); > drm_kms_helper_poll_fini(drm); > > component_unbind_all(drm->dev, drm); > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h > b/drivers/gpu/drm/mediatek/mtk_drm_drv.h > index c3378c4..4edc002 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h > @@ -14,6 +14,7 @@ > #ifndef MTK_DRM_DRV_H > #define MTK_DRM_DRV_H > > +#include <drm/drm_fb_helper.h> > #include <linux/io.h> > #include "mtk_drm_ddp_comp.h" > > @@ -24,7 +25,6 @@ struct device; > struct device_node; > struct drm_crtc; > struct drm_device; > -struct drm_fb_helper; > struct drm_property; > struct regmap; > > @@ -56,6 +56,8 @@ struct mtk_drm_private { > } commit; > > struct drm_atomic_state *suspend_state; > + struct drm_fb_helper fb_helper; > + struct drm_gem_object *fbdev_bo; > }; > > extern struct platform_driver mtk_ddp_driver; > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.c > b/drivers/gpu/drm/mediatek/mtk_drm_fb.c > index 0d8d506..ac8561d 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_fb.c > +++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.c > @@ -96,6 +96,19 @@ static struct mtk_drm_fb *mtk_drm_framebuffer_init(struct > drm_device *dev, > return mtk_fb; > } > > +struct drm_framebuffer *mtk_drm_framebuffer_create(struct drm_device *dev, > + const struct drm_mode_fb_cmd2 *mode, > + struct drm_gem_object *obj) > +{ > + struct mtk_drm_fb *mtk_fb; > + > + mtk_fb = mtk_drm_framebuffer_init(dev, mode, obj); > + if (IS_ERR(mtk_fb)) > + return ERR_CAST(mtk_fb); > + > + return &mtk_fb->base; > +} > + > /* > * Wait for any exclusive fence in fb's gem object's reservation object. > * > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.h > b/drivers/gpu/drm/mediatek/mtk_drm_fb.h > index 9b2ae34..9ee1ac2 100644 > --- a/drivers/gpu/drm/mediatek/mtk_drm_fb.h > +++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.h > @@ -19,5 +19,8 @@ int mtk_fb_wait(struct drm_framebuffer *fb); > struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev, > struct drm_file *file, > const struct drm_mode_fb_cmd2 > *cmd); > +struct drm_framebuffer *mtk_drm_framebuffer_create(struct drm_device *dev, > + const struct drm_mode_fb_cmd2 *mode, > + struct drm_gem_object *obj); > > #endif /* MTK_DRM_FB_H */ > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fbdev.c > b/drivers/gpu/drm/mediatek/mtk_drm_fbdev.c > new file mode 100644 > index 0000000..1e46216 > --- /dev/null > +++ b/drivers/gpu/drm/mediatek/mtk_drm_fbdev.c > @@ -0,0 +1,184 @@ > +/* > + * Copyright (c) 2016 MediaTek Inc. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include <drm/drmP.h> > +#include <drm/drm_crtc_helper.h> > +#include <drm/drm_fb_helper.h> > +#include <drm/drm_gem.h> > + > +#include "mtk_drm_drv.h" > +#include "mtk_drm_fb.h" > +#include "mtk_drm_gem.h" > + > +#define to_drm_private(x) \ > + container_of(x, struct mtk_drm_private, fb_helper) > + > +#if 1 > +static int mtk_drm_fbdev_mmap(struct fb_info *info, struct vm_area_struct > *vma) > +{ > + struct drm_fb_helper *helper = info->par; > + struct mtk_drm_private *private = > helper->dev->dev_private;//to_drm_private(helper); > + > + return mtk_drm_gem_mmap_buf(private->fbdev_bo, vma); > +} > +#endif > + > +static struct fb_ops mtk_fbdev_ops = { > + .owner = THIS_MODULE, > + .fb_fillrect = drm_fb_helper_cfb_fillrect, > + .fb_copyarea = drm_fb_helper_cfb_copyarea, > + .fb_imageblit = drm_fb_helper_cfb_imageblit, > + .fb_check_var = drm_fb_helper_check_var, > + .fb_set_par = drm_fb_helper_set_par, > + .fb_blank = drm_fb_helper_blank, > + .fb_pan_display = drm_fb_helper_pan_display, > + .fb_setcmap = drm_fb_helper_setcmap, > + .fb_mmap = mtk_drm_fbdev_mmap, > +}; > + > +static int mtk_fbdev_probe(struct drm_fb_helper *helper, > + struct drm_fb_helper_surface_size *sizes) > +{ > + struct drm_device *dev = helper->dev; > + struct mtk_drm_private *private = > helper->dev->dev_private;//to_drm_private(helper); > + struct drm_mode_fb_cmd2 mode = { 0 }; > + struct mtk_drm_gem_obj *mtk_gem; > + struct fb_info *info; > + struct drm_framebuffer *fb; > + unsigned int bytes_per_pixel; > + unsigned long offset; > + size_t size; > + int err; > + > + bytes_per_pixel = DIV_ROUND_UP(sizes->surface_bpp, 8); > + > + mode.width = sizes->surface_width; > + mode.height = sizes->surface_height; > + mode.pitches[0] = sizes->surface_width * bytes_per_pixel; > + mode.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, > + sizes->surface_depth); > + > + size = mode.pitches[0] * mode.height; > + > + mtk_gem = mtk_drm_gem_create(dev, size, true); > + if (IS_ERR(mtk_gem)) > + return PTR_ERR(mtk_gem); > + > + private->fbdev_bo = &mtk_gem->base; > + > + info = drm_fb_helper_alloc_fbi(helper); > + if (IS_ERR(info)) { > + err = PTR_ERR(info); > + dev_err(dev->dev, "failed to allocate framebuffer info, %d\n", > + err); > + goto err_gem_free_object; > + } > + > + fb = mtk_drm_framebuffer_create(dev, &mode, private->fbdev_bo); > + if (IS_ERR(fb)) { > + err = PTR_ERR(fb); > + dev_err(dev->dev, "failed to allocate DRM framebuffer, %d\n", > + err); > + goto err_release_fbi; > + } > + helper->fb = fb; > + > + info->par = helper; > + info->flags = FBINFO_FLAG_DEFAULT; > + info->fbops = &mtk_fbdev_ops; > + > + drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth); > + drm_fb_helper_fill_var(info, helper, sizes->fb_width, sizes->fb_height); > + > + offset = info->var.xoffset * bytes_per_pixel; > + offset += info->var.yoffset * fb->pitches[0]; > + > + dev->mode_config.fb_base = 0; > + info->screen_base = mtk_gem->kvaddr + offset; > + info->screen_size = size; > + info->fix.smem_len = size; > + > + DRM_DEBUG_KMS("FB [%ux%u]-%u offset=%lu size=%zd\n", > + fb->width, fb->height, fb->format->depth, offset, size); > + > + info->skip_vt_switch = true; > + > + return 0; > + > +err_release_fbi: > +err_gem_free_object: > + mtk_drm_gem_free_object(&mtk_gem->base); > + return err; > +} > + > +static const struct drm_fb_helper_funcs mtk_drm_fb_helper_funcs = { > + .fb_probe = mtk_fbdev_probe, > +}; > + > +int mtk_fbdev_init(struct drm_device *dev) > +{ > + struct mtk_drm_private *priv = dev->dev_private; > + struct drm_fb_helper *helper = &priv->fb_helper; > + int ret; > + > + if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector) > + return -EINVAL; > + > + drm_fb_helper_prepare(dev, helper, &mtk_drm_fb_helper_funcs); > + > + ret = drm_fb_helper_init(dev, helper, /*dev->mode_config.num_crtc,*/ > + dev->mode_config.num_connector); > + if (ret) { > + dev_err(dev->dev, "failed to initialize DRM FB helper, %d\n", > + ret); > + goto fini; > + } > + > + ret = drm_fb_helper_single_add_all_connectors(helper); > + if (ret) { > + dev_err(dev->dev, "failed to add connectors, %d\n", ret); > + goto fini; > + } > + > + /* disable all the possible outputs/crtcs before entering KMS mode */ > +// drm_helper_disable_unused_functions(dev); > + > + ret = drm_fb_helper_initial_config(helper, 32); > + if (ret) { > + dev_err(dev->dev, "failed to set initial configuration, %d\n", > + ret); > + goto fini; > + } > + > + return 0; > + > +fini: > + drm_fb_helper_fini(helper); > + > + return ret; > +} > + > +void mtk_fbdev_fini(struct drm_device *dev) > +{ > + struct mtk_drm_private *priv = dev->dev_private; > + struct drm_fb_helper *helper = &priv->fb_helper; > + > + drm_fb_helper_unregister_fbi(helper); > + > + if (helper->fb) { > + drm_framebuffer_unregister_private(helper->fb); > + drm_framebuffer_remove(helper->fb); > + } > + > + drm_fb_helper_fini(helper); > +} > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fbdev.h > b/drivers/gpu/drm/mediatek/mtk_drm_fbdev.h > new file mode 100644 > index 0000000..f3e0949 > --- /dev/null > +++ b/drivers/gpu/drm/mediatek/mtk_drm_fbdev.h > @@ -0,0 +1,32 @@ > +/* > + * Copyright (c) 2016 MediaTek Inc. > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#ifndef MTK_DRM_FBDEV_H > +#define MTK_DRM_FBDEV_H > + > +#ifdef CONFIG_DRM_FBDEV_EMULATION > +int mtk_fbdev_init(struct drm_device *dev); > +void mtk_fbdev_fini(struct drm_device *dev); > +#else > +int mtk_fbdev_init(struct drm_device *dev) > +{ > + return 0; > +} > + > +void mtk_fbdev_fini(struct drm_device *dev) > +{ > + > +} > +#endif /* CONFIG_DRM_FBDEV_EMULATION */ > + > +#endif /* MTK_DRM_FBDEV_H */ _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
