[PATCH v5 1/3] drm/udl: Replace fbdev code with generic emulation
Thomas Zimmermann
tzimmermann at suse.de
Thu Nov 14 12:51:04 UTC 2019
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 at suse.de>
Reviewed-by: Noralf Trønnes <noralf at tronnes.org>
---
drivers/gpu/drm/udl/udl_drv.c | 8 +-
drivers/gpu/drm/udl/udl_drv.h | 6 -
drivers/gpu/drm/udl/udl_fb.c | 282 ------------------------------
drivers/gpu/drm/udl/udl_main.c | 6 -
drivers/gpu/drm/udl/udl_modeset.c | 1 -
5 files changed, 7 insertions(+), 296 deletions(-)
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
index 563cc5809e56..d5783fa32c5b 100644
--- a/drivers/gpu/drm/udl/udl_drv.c
+++ b/drivers/gpu/drm/udl/udl_drv.c
@@ -7,6 +7,7 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
#include <drm/drm_file.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_ioctl.h>
@@ -107,8 +108,14 @@ static int udl_usb_probe(struct usb_interface *interface,
DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
+ r = drm_fbdev_generic_setup(&udl->drm, 16);
+ if (r)
+ goto err_drm_dev_unregister;
+
return 0;
+err_drm_dev_unregister:
+ drm_dev_unregister(&udl->drm);
err_free:
drm_dev_put(&udl->drm);
return r;
@@ -119,7 +126,6 @@ static void udl_usb_disconnect(struct usb_interface *interface)
struct drm_device *dev = usb_get_intfdata(interface);
drm_kms_helper_poll_disable(dev);
- udl_fbdev_unplug(dev);
udl_drop_usb(dev);
drm_dev_unplug(dev);
drm_dev_put(dev);
diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
index 987d99ae2dfa..be585e3e572d 100644
--- a/drivers/gpu/drm/udl/udl_drv.h
+++ b/drivers/gpu/drm/udl/udl_drv.h
@@ -47,8 +47,6 @@ struct urb_list {
size_t size;
};
-struct udl_fbdev;
-
struct udl_device {
struct drm_device drm;
struct device *dev;
@@ -62,7 +60,6 @@ struct udl_device {
struct urb_list urbs;
atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
- struct udl_fbdev *fbdev;
char mode_buf[1024];
uint32_t mode_buf_len;
atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
@@ -97,9 +94,6 @@ void udl_urb_completion(struct urb *urb);
int udl_init(struct udl_device *udl);
void udl_fini(struct drm_device *dev);
-int udl_fbdev_init(struct drm_device *dev);
-void udl_fbdev_cleanup(struct drm_device *dev);
-void udl_fbdev_unplug(struct drm_device *dev);
struct drm_framebuffer *
udl_fb_user_fb_create(struct drm_device *dev,
struct drm_file *file,
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index f8153b726343..8fe4d8cf3212 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -13,27 +13,12 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_shmem_helper.h>
#include <drm/drm_modeset_helper.h>
#include "udl_drv.h"
-#define DL_DEFIO_WRITE_DELAY (HZ/20) /* fb_deferred_io.delay in jiffies */
-
-static int fb_defio = 0; /* Optionally enable experimental fb_defio mmap support */
-static int fb_bpp = 16;
-
-module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
-module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
-
-struct udl_fbdev {
- struct drm_fb_helper helper; /* must be first */
- struct udl_framebuffer ufb;
- int fb_count;
-};
-
#define DL_ALIGN_UP(x, a) ALIGN(x, a)
#define DL_ALIGN_DOWN(x, a) ALIGN_DOWN(x, a)
@@ -156,123 +141,6 @@ int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
return 0;
}
-static int udl_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
-{
- unsigned long start = vma->vm_start;
- unsigned long size = vma->vm_end - vma->vm_start;
- unsigned long offset;
- unsigned long page, pos;
-
- if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
- return -EINVAL;
-
- offset = vma->vm_pgoff << PAGE_SHIFT;
-
- if (offset > info->fix.smem_len || size > info->fix.smem_len - offset)
- return -EINVAL;
-
- pos = (unsigned long)info->fix.smem_start + offset;
-
- pr_debug("mmap() framebuffer addr:%lu size:%lu\n",
- pos, size);
-
- /* We don't want the framebuffer to be mapped encrypted */
- vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
-
- while (size > 0) {
- page = vmalloc_to_pfn((void *)pos);
- if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED))
- return -EAGAIN;
-
- start += PAGE_SIZE;
- pos += PAGE_SIZE;
- if (size > PAGE_SIZE)
- size -= PAGE_SIZE;
- else
- size = 0;
- }
-
- /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
- return 0;
-}
-
-/*
- * It's common for several clients to have framebuffer open simultaneously.
- * e.g. both fbcon and X. Makes things interesting.
- * Assumes caller is holding info->lock (for open and release at least)
- */
-static int udl_fb_open(struct fb_info *info, int user)
-{
- struct udl_fbdev *ufbdev = info->par;
- struct drm_device *dev = ufbdev->ufb.base.dev;
- struct udl_device *udl = to_udl(dev);
-
- /* If the USB device is gone, we don't accept new opens */
- if (drm_dev_is_unplugged(&udl->drm))
- return -ENODEV;
-
- ufbdev->fb_count++;
-
-#ifdef CONFIG_DRM_FBDEV_EMULATION
- if (fb_defio && (info->fbdefio == NULL)) {
- /* enable defio at last moment if not disabled by client */
-
- struct fb_deferred_io *fbdefio;
-
- fbdefio = kzalloc(sizeof(struct fb_deferred_io), GFP_KERNEL);
-
- if (fbdefio) {
- fbdefio->delay = DL_DEFIO_WRITE_DELAY;
- fbdefio->deferred_io = drm_fb_helper_deferred_io;
- }
-
- info->fbdefio = fbdefio;
- fb_deferred_io_init(info);
- }
-#endif
-
- pr_debug("open /dev/fb%d user=%d fb_info=%p count=%d\n",
- info->node, user, info, ufbdev->fb_count);
-
- return 0;
-}
-
-
-/*
- * Assumes caller is holding info->lock mutex (for open and release at least)
- */
-static int udl_fb_release(struct fb_info *info, int user)
-{
- struct udl_fbdev *ufbdev = info->par;
-
- ufbdev->fb_count--;
-
-#ifdef CONFIG_DRM_FBDEV_EMULATION
- if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
- fb_deferred_io_cleanup(info);
- kfree(info->fbdefio);
- info->fbdefio = NULL;
- info->fbops->fb_mmap = udl_fb_mmap;
- }
-#endif
-
- pr_debug("released /dev/fb%d user=%d count=%d\n",
- info->node, user, ufbdev->fb_count);
-
- return 0;
-}
-
-static struct fb_ops udlfb_ops = {
- .owner = THIS_MODULE,
- DRM_FB_HELPER_DEFAULT_OPS,
- .fb_fillrect = drm_fb_helper_sys_fillrect,
- .fb_copyarea = drm_fb_helper_sys_copyarea,
- .fb_imageblit = drm_fb_helper_sys_imageblit,
- .fb_mmap = udl_fb_mmap,
- .fb_open = udl_fb_open,
- .fb_release = udl_fb_release,
-};
-
static int udl_user_framebuffer_dirty(struct drm_framebuffer *fb,
struct drm_file *file,
unsigned flags, unsigned color,
@@ -347,156 +215,6 @@ udl_framebuffer_init(struct drm_device *dev,
return ret;
}
-
-static int udlfb_create(struct drm_fb_helper *helper,
- struct drm_fb_helper_surface_size *sizes)
-{
- struct udl_fbdev *ufbdev =
- container_of(helper, struct udl_fbdev, helper);
- struct drm_device *dev = ufbdev->helper.dev;
- struct fb_info *info;
- struct drm_framebuffer *fb;
- struct drm_mode_fb_cmd2 mode_cmd;
- struct drm_gem_shmem_object *shmem;
- void *vaddr;
- uint32_t size;
- int ret = 0;
-
- if (sizes->surface_bpp == 24)
- sizes->surface_bpp = 32;
-
- mode_cmd.width = sizes->surface_width;
- mode_cmd.height = sizes->surface_height;
- mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
-
- mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
- sizes->surface_depth);
-
- size = mode_cmd.pitches[0] * mode_cmd.height;
- size = ALIGN(size, PAGE_SIZE);
-
- shmem = drm_gem_shmem_create(dev, size);
- if (IS_ERR(shmem)) {
- ret = PTR_ERR(shmem);
- goto out;
- }
-
- vaddr = drm_gem_shmem_vmap(&shmem->base);
- if (IS_ERR(vaddr)) {
- ret = PTR_ERR(vaddr);
- DRM_ERROR("failed to vmap fb\n");
- goto out_gfree;
- }
-
- info = drm_fb_helper_alloc_fbi(helper);
- if (IS_ERR(info)) {
- ret = PTR_ERR(info);
- goto out_gfree;
- }
-
- ret = udl_framebuffer_init(dev, &ufbdev->ufb, &mode_cmd, shmem);
- if (ret)
- goto out_gfree;
-
- fb = &ufbdev->ufb.base;
-
- ufbdev->helper.fb = fb;
-
- info->screen_base = vaddr;
- info->fix.smem_len = size;
- info->fix.smem_start = (unsigned long)vaddr;
-
- info->fbops = &udlfb_ops;
- drm_fb_helper_fill_info(info, &ufbdev->helper, sizes);
-
- DRM_DEBUG_KMS("allocated %dx%d vmal %p\n",
- fb->width, fb->height,
- ufbdev->ufb.shmem->vaddr);
-
- return ret;
-out_gfree:
- drm_gem_object_put_unlocked(&ufbdev->ufb.shmem->base);
-out:
- return ret;
-}
-
-static const struct drm_fb_helper_funcs udl_fb_helper_funcs = {
- .fb_probe = udlfb_create,
-};
-
-static void udl_fbdev_destroy(struct drm_device *dev,
- struct udl_fbdev *ufbdev)
-{
- drm_fb_helper_unregister_fbi(&ufbdev->helper);
- drm_fb_helper_fini(&ufbdev->helper);
- if (ufbdev->ufb.shmem) {
- drm_framebuffer_unregister_private(&ufbdev->ufb.base);
- drm_framebuffer_cleanup(&ufbdev->ufb.base);
- drm_gem_object_put_unlocked(&ufbdev->ufb.shmem->base);
- }
-}
-
-int udl_fbdev_init(struct drm_device *dev)
-{
- struct udl_device *udl = to_udl(dev);
- int bpp_sel = fb_bpp;
- struct udl_fbdev *ufbdev;
- int ret;
-
- ufbdev = kzalloc(sizeof(struct udl_fbdev), GFP_KERNEL);
- if (!ufbdev)
- return -ENOMEM;
-
- udl->fbdev = ufbdev;
-
- drm_fb_helper_prepare(dev, &ufbdev->helper, &udl_fb_helper_funcs);
-
- ret = drm_fb_helper_init(dev, &ufbdev->helper, 1);
- if (ret)
- goto free;
-
- ret = drm_fb_helper_single_add_all_connectors(&ufbdev->helper);
- if (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(&ufbdev->helper, bpp_sel);
- if (ret)
- goto fini;
-
- return 0;
-
-fini:
- drm_fb_helper_fini(&ufbdev->helper);
-free:
- kfree(ufbdev);
- return ret;
-}
-
-void udl_fbdev_cleanup(struct drm_device *dev)
-{
- struct udl_device *udl = to_udl(dev);
- if (!udl->fbdev)
- return;
-
- udl_fbdev_destroy(dev, udl->fbdev);
- kfree(udl->fbdev);
- udl->fbdev = NULL;
-}
-
-void udl_fbdev_unplug(struct drm_device *dev)
-{
- struct udl_device *udl = to_udl(dev);
- struct udl_fbdev *ufbdev;
- if (!udl->fbdev)
- return;
-
- ufbdev = udl->fbdev;
- drm_fb_helper_unlink_fbi(&ufbdev->helper);
-}
-
struct drm_framebuffer *
udl_fb_user_fb_create(struct drm_device *dev,
struct drm_file *file,
diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c
index 4e854e017390..9b091b5b063e 100644
--- a/drivers/gpu/drm/udl/udl_main.c
+++ b/drivers/gpu/drm/udl/udl_main.c
@@ -338,10 +338,6 @@ int udl_init(struct udl_device *udl)
if (ret)
goto err;
- ret = udl_fbdev_init(dev);
- if (ret)
- goto err;
-
drm_kms_helper_poll_init(dev);
return 0;
@@ -367,6 +363,4 @@ void udl_fini(struct drm_device *dev)
if (udl->urbs.count)
udl_free_urb_list(dev);
-
- udl_fbdev_cleanup(dev);
}
diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
index bc1ab6060dc6..6582c9d27a87 100644
--- a/drivers/gpu/drm/udl/udl_modeset.c
+++ b/drivers/gpu/drm/udl/udl_modeset.c
@@ -422,7 +422,6 @@ static int udl_crtc_init(struct drm_device *dev)
static const struct drm_mode_config_funcs udl_mode_funcs = {
.fb_create = udl_fb_user_fb_create,
- .output_poll_changed = NULL,
};
int udl_modeset_init(struct drm_device *dev)
--
2.23.0
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