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drm/udl: Replace fbdev code with generic emulation
The udl driver can use the generic fbdev implementation. Convert it. v5: * initialize console after registering device v4: * hardcode console bpp to 16 v3: * remove module parameter fb_bpp in favor of fbdev's video * call drm_fbdev_generic_setup() directly; remove udl_fbdev_init() * use default for struct drm_mode_config_funcs.output_poll_changed * use default for struct drm_driver.lastclose Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/20191114125106.28347-2-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
parent
81fa149b2d
commit
d0c4fc5a48
@ -7,6 +7,7 @@
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_file.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_ioctl.h>
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@ -107,8 +108,14 @@ static int udl_usb_probe(struct usb_interface *interface,
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DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
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r = drm_fbdev_generic_setup(&udl->drm, 16);
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if (r)
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goto err_drm_dev_unregister;
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return 0;
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err_drm_dev_unregister:
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drm_dev_unregister(&udl->drm);
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err_free:
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drm_dev_put(&udl->drm);
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return r;
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@ -119,7 +126,6 @@ static void udl_usb_disconnect(struct usb_interface *interface)
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struct drm_device *dev = usb_get_intfdata(interface);
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drm_kms_helper_poll_disable(dev);
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udl_fbdev_unplug(dev);
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udl_drop_usb(dev);
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drm_dev_unplug(dev);
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drm_dev_put(dev);
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@ -47,8 +47,6 @@ struct urb_list {
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size_t size;
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};
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struct udl_fbdev;
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struct udl_device {
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struct drm_device drm;
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struct device *dev;
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@ -62,7 +60,6 @@ struct udl_device {
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struct urb_list urbs;
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atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
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struct udl_fbdev *fbdev;
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char mode_buf[1024];
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uint32_t mode_buf_len;
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atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
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@ -97,9 +94,6 @@ void udl_urb_completion(struct urb *urb);
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int udl_init(struct udl_device *udl);
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void udl_fini(struct drm_device *dev);
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int udl_fbdev_init(struct drm_device *dev);
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void udl_fbdev_cleanup(struct drm_device *dev);
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void udl_fbdev_unplug(struct drm_device *dev);
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struct drm_framebuffer *
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udl_fb_user_fb_create(struct drm_device *dev,
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struct drm_file *file,
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@ -13,27 +13,12 @@
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_gem_shmem_helper.h>
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#include <drm/drm_modeset_helper.h>
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#include "udl_drv.h"
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#define DL_DEFIO_WRITE_DELAY (HZ/20) /* fb_deferred_io.delay in jiffies */
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static int fb_defio = 0; /* Optionally enable experimental fb_defio mmap support */
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static int fb_bpp = 16;
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module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
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module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
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struct udl_fbdev {
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struct drm_fb_helper helper; /* must be first */
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struct udl_framebuffer ufb;
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int fb_count;
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};
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#define DL_ALIGN_UP(x, a) ALIGN(x, a)
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#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
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@ -156,123 +141,6 @@ error:
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return 0;
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}
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static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
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{
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unsigned long start = vma->vm_start;
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unsigned long size = vma->vm_end - vma->vm_start;
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unsigned long offset;
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unsigned long page, pos;
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if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
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return -EINVAL;
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offset = vma->vm_pgoff << PAGE_SHIFT;
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if (offset > info->fix.smem_len || size > info->fix.smem_len - offset)
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return -EINVAL;
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pos = (unsigned long)info->fix.smem_start + offset;
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pr_debug("mmap() framebuffer addr:%lu size:%lu\n",
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pos, size);
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/* We don't want the framebuffer to be mapped encrypted */
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vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
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while (size > 0) {
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page = vmalloc_to_pfn((void *)pos);
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if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
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return -EAGAIN;
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start += PAGE_SIZE;
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pos += PAGE_SIZE;
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if (size > PAGE_SIZE)
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size -= PAGE_SIZE;
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else
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size = 0;
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}
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/* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
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return 0;
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}
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/*
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* It's common for several clients to have framebuffer open simultaneously.
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* e.g. both fbcon and X. Makes things interesting.
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* Assumes caller is holding info->lock (for open and release at least)
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*/
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static int udl_fb_open(struct fb_info *info, int user)
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{
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struct udl_fbdev *ufbdev = info->par;
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struct drm_device *dev = ufbdev->ufb.base.dev;
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struct udl_device *udl = to_udl(dev);
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/* If the USB device is gone, we don't accept new opens */
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if (drm_dev_is_unplugged(&udl->drm))
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return -ENODEV;
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ufbdev->fb_count++;
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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if (fb_defio && (info->fbdefio == NULL)) {
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/* enable defio at last moment if not disabled by client */
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struct fb_deferred_io *fbdefio;
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fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
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if (fbdefio) {
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fbdefio->delay = DL_DEFIO_WRITE_DELAY;
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fbdefio->deferred_io = drm_fb_helper_deferred_io;
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}
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info->fbdefio = fbdefio;
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fb_deferred_io_init(info);
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}
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#endif
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pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d\n",
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info->node, user, info, ufbdev->fb_count);
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return 0;
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}
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/*
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* Assumes caller is holding info->lock mutex (for open and release at least)
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*/
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static int udl_fb_release(struct fb_info *info, int user)
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{
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struct udl_fbdev *ufbdev = info->par;
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ufbdev->fb_count--;
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#ifdef CONFIG_DRM_FBDEV_EMULATION
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if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
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fb_deferred_io_cleanup(info);
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kfree(info->fbdefio);
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info->fbdefio = NULL;
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info->fbops->fb_mmap = udl_fb_mmap;
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}
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#endif
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pr_debug("released /dev/fb%d user=%d count=%d\n",
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info->node, user, ufbdev->fb_count);
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return 0;
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}
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static struct fb_ops udlfb_ops = {
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.owner = THIS_MODULE,
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DRM_FB_HELPER_DEFAULT_OPS,
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.fb_fillrect = drm_fb_helper_sys_fillrect,
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.fb_copyarea = drm_fb_helper_sys_copyarea,
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.fb_imageblit = drm_fb_helper_sys_imageblit,
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.fb_mmap = udl_fb_mmap,
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.fb_open = udl_fb_open,
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.fb_release = udl_fb_release,
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};
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static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
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struct drm_file *file,
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unsigned flags, unsigned color,
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@ -347,156 +215,6 @@ udl_framebuffer_init(struct drm_device *dev,
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return ret;
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}
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static int udlfb_create(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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{
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struct udl_fbdev *ufbdev =
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container_of(helper, struct udl_fbdev, helper);
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struct drm_device *dev = ufbdev->helper.dev;
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struct fb_info *info;
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struct drm_framebuffer *fb;
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struct drm_mode_fb_cmd2 mode_cmd;
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struct drm_gem_shmem_object *shmem;
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void *vaddr;
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uint32_t size;
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int ret = 0;
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if (sizes->surface_bpp == 24)
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sizes->surface_bpp = 32;
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mode_cmd.width = sizes->surface_width;
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mode_cmd.height = sizes->surface_height;
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mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
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mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
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sizes->surface_depth);
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size = mode_cmd.pitches[0] * mode_cmd.height;
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size = ALIGN(size, PAGE_SIZE);
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shmem = drm_gem_shmem_create(dev, size);
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if (IS_ERR(shmem)) {
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ret = PTR_ERR(shmem);
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goto out;
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}
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vaddr = drm_gem_shmem_vmap(&shmem->base);
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if (IS_ERR(vaddr)) {
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ret = PTR_ERR(vaddr);
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DRM_ERROR("failed to vmap fb\n");
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goto out_gfree;
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}
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info = drm_fb_helper_alloc_fbi(helper);
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if (IS_ERR(info)) {
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ret = PTR_ERR(info);
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goto out_gfree;
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}
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ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, shmem);
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if (ret)
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goto out_gfree;
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fb = &ufbdev->ufb.base;
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ufbdev->helper.fb = fb;
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info->screen_base = vaddr;
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info->fix.smem_len = size;
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info->fix.smem_start = (unsigned long)vaddr;
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info->fbops = &udlfb_ops;
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drm_fb_helper_fill_info(info, &ufbdev->helper, sizes);
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DRM_DEBUG_KMS("allocated %dx%d vmal %p\n",
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fb->width, fb->height,
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ufbdev->ufb.shmem->vaddr);
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return ret;
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out_gfree:
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drm_gem_object_put_unlocked(&ufbdev->ufb.shmem->base);
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out:
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return ret;
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}
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static const struct drm_fb_helper_funcs udl_fb_helper_funcs = {
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.fb_probe = udlfb_create,
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};
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static void udl_fbdev_destroy(struct drm_device *dev,
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struct udl_fbdev *ufbdev)
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{
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drm_fb_helper_unregister_fbi(&ufbdev->helper);
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drm_fb_helper_fini(&ufbdev->helper);
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if (ufbdev->ufb.shmem) {
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drm_framebuffer_unregister_private(&ufbdev->ufb.base);
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drm_framebuffer_cleanup(&ufbdev->ufb.base);
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drm_gem_object_put_unlocked(&ufbdev->ufb.shmem->base);
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}
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}
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int udl_fbdev_init(struct drm_device *dev)
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{
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struct udl_device *udl = to_udl(dev);
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int bpp_sel = fb_bpp;
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struct udl_fbdev *ufbdev;
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int ret;
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ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL);
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if (!ufbdev)
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return -ENOMEM;
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udl->fbdev = ufbdev;
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drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs);
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ret = drm_fb_helper_init(dev, &ufbdev->helper, 1);
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if (ret)
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goto free;
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ret = drm_fb_helper_single_add_all_connectors(&ufbdev->helper);
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if (ret)
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goto fini;
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/* disable all the possible outputs/crtcs before entering KMS mode */
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drm_helper_disable_unused_functions(dev);
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ret = drm_fb_helper_initial_config(&ufbdev->helper, bpp_sel);
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if (ret)
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goto fini;
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return 0;
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fini:
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drm_fb_helper_fini(&ufbdev->helper);
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free:
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kfree(ufbdev);
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return ret;
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}
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void udl_fbdev_cleanup(struct drm_device *dev)
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{
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struct udl_device *udl = to_udl(dev);
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if (!udl->fbdev)
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return;
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udl_fbdev_destroy(dev, udl->fbdev);
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kfree(udl->fbdev);
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udl->fbdev = NULL;
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}
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void udl_fbdev_unplug(struct drm_device *dev)
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{
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struct udl_device *udl = to_udl(dev);
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struct udl_fbdev *ufbdev;
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if (!udl->fbdev)
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return;
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ufbdev = udl->fbdev;
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drm_fb_helper_unlink_fbi(&ufbdev->helper);
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}
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struct drm_framebuffer *
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udl_fb_user_fb_create(struct drm_device *dev,
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struct drm_file *file,
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@ -338,10 +338,6 @@ int udl_init(struct udl_device *udl)
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if (ret)
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goto err;
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ret = udl_fbdev_init(dev);
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if (ret)
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goto err;
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drm_kms_helper_poll_init(dev);
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return 0;
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@ -367,6 +363,4 @@ void udl_fini(struct drm_device *dev)
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if (udl->urbs.count)
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udl_free_urb_list(dev);
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udl_fbdev_cleanup(dev);
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}
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@ -422,7 +422,6 @@ static int udl_crtc_init(struct drm_device *dev)
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static const struct drm_mode_config_funcs udl_mode_funcs = {
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.fb_create = udl_fb_user_fb_create,
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.output_poll_changed = NULL,
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};
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int udl_modeset_init(struct drm_device *dev)
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