From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- drivers/video/fbdev/sbuslib.c | 288 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 288 insertions(+) create mode 100644 drivers/video/fbdev/sbuslib.c (limited to 'drivers/video/fbdev/sbuslib.c') diff --git a/drivers/video/fbdev/sbuslib.c b/drivers/video/fbdev/sbuslib.c new file mode 100644 index 000000000..dd2002d08 --- /dev/null +++ b/drivers/video/fbdev/sbuslib.c @@ -0,0 +1,288 @@ +// SPDX-License-Identifier: GPL-2.0 +/* sbuslib.c: Helper library for SBUS framebuffer drivers. + * + * Copyright (C) 2003 David S. Miller (davem@redhat.com) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "sbuslib.h" + +void sbusfb_fill_var(struct fb_var_screeninfo *var, struct device_node *dp, + int bpp) +{ + memset(var, 0, sizeof(*var)); + + var->xres = of_getintprop_default(dp, "width", 1152); + var->yres = of_getintprop_default(dp, "height", 900); + var->xres_virtual = var->xres; + var->yres_virtual = var->yres; + var->bits_per_pixel = bpp; +} + +EXPORT_SYMBOL(sbusfb_fill_var); + +static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize) +{ + if (size == SBUS_MMAP_EMPTY) return 0; + if (size >= 0) return size; + return fbsize * (-size); +} + +int sbusfb_mmap_helper(const struct sbus_mmap_map *map, + unsigned long physbase, + unsigned long fbsize, + unsigned long iospace, + struct vm_area_struct *vma) +{ + unsigned int size, page, r, map_size; + unsigned long map_offset = 0; + unsigned long off; + int i; + + if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE))) + return -EINVAL; + + size = vma->vm_end - vma->vm_start; + if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) + return -EINVAL; + + off = vma->vm_pgoff << PAGE_SHIFT; + + /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */ + + vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + /* Each page, see which map applies */ + for (page = 0; page < size; ){ + map_size = 0; + for (i = 0; map[i].size; i++) + if (map[i].voff == off+page) { + map_size = sbusfb_mmapsize(map[i].size, fbsize); +#ifdef __sparc_v9__ +#define POFF_MASK (PAGE_MASK|0x1UL) +#else +#define POFF_MASK (PAGE_MASK) +#endif + map_offset = (physbase + map[i].poff) & POFF_MASK; + break; + } + if (!map_size) { + page += PAGE_SIZE; + continue; + } + if (page + map_size > size) + map_size = size - page; + r = io_remap_pfn_range(vma, + vma->vm_start + page, + MK_IOSPACE_PFN(iospace, + map_offset >> PAGE_SHIFT), + map_size, + vma->vm_page_prot); + if (r) + return -EAGAIN; + page += map_size; + } + + return 0; +} +EXPORT_SYMBOL(sbusfb_mmap_helper); + +int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, + struct fb_info *info, + int type, int fb_depth, unsigned long fb_size) +{ + switch(cmd) { + case FBIOGTYPE: { + struct fbtype __user *f = (struct fbtype __user *) arg; + + if (put_user(type, &f->fb_type) || + put_user(info->var.yres, &f->fb_height) || + put_user(info->var.xres, &f->fb_width) || + put_user(fb_depth, &f->fb_depth) || + put_user(0, &f->fb_cmsize) || + put_user(fb_size, &f->fb_cmsize)) + return -EFAULT; + return 0; + } + case FBIOPUTCMAP_SPARC: { + struct fbcmap __user *c = (struct fbcmap __user *) arg; + struct fb_cmap cmap; + u16 red, green, blue; + u8 red8, green8, blue8; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + unsigned int index, count, i; + + if (get_user(index, &c->index) || + get_user(count, &c->count) || + get_user(ured, &c->red) || + get_user(ugreen, &c->green) || + get_user(ublue, &c->blue)) + return -EFAULT; + + cmap.len = 1; + cmap.red = &red; + cmap.green = &green; + cmap.blue = &blue; + cmap.transp = NULL; + for (i = 0; i < count; i++) { + int err; + + if (get_user(red8, &ured[i]) || + get_user(green8, &ugreen[i]) || + get_user(blue8, &ublue[i])) + return -EFAULT; + + red = red8 << 8; + green = green8 << 8; + blue = blue8 << 8; + + cmap.start = index + i; + err = fb_set_cmap(&cmap, info); + if (err) + return err; + } + return 0; + } + case FBIOGETCMAP_SPARC: { + struct fbcmap __user *c = (struct fbcmap __user *) arg; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + struct fb_cmap *cmap = &info->cmap; + unsigned int index, count, i; + u8 red, green, blue; + + if (get_user(index, &c->index) || + get_user(count, &c->count) || + get_user(ured, &c->red) || + get_user(ugreen, &c->green) || + get_user(ublue, &c->blue)) + return -EFAULT; + + if (index > cmap->len || count > cmap->len - index) + return -EINVAL; + + for (i = 0; i < count; i++) { + red = cmap->red[index + i] >> 8; + green = cmap->green[index + i] >> 8; + blue = cmap->blue[index + i] >> 8; + if (put_user(red, &ured[i]) || + put_user(green, &ugreen[i]) || + put_user(blue, &ublue[i])) + return -EFAULT; + } + return 0; + } + default: + return -EINVAL; + } +} +EXPORT_SYMBOL(sbusfb_ioctl_helper); + +#ifdef CONFIG_COMPAT +int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case FBIOGTYPE: + case FBIOSATTR: + case FBIOGATTR: + case FBIOSVIDEO: + case FBIOGVIDEO: + case FBIOSCURSOR32: + case FBIOGCURSOR32: /* This is not implemented yet. + Later it should be converted... */ + case FBIOSCURPOS: + case FBIOGCURPOS: + case FBIOGCURMAX: + return info->fbops->fb_ioctl(info, cmd, arg); + case FBIOPUTCMAP32: + case FBIOPUTCMAP_SPARC: { + struct fbcmap32 c; + struct fb_cmap cmap; + u16 red, green, blue; + u8 red8, green8, blue8; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + unsigned int i; + + if (copy_from_user(&c, compat_ptr(arg), sizeof(c))) + return -EFAULT; + ured = compat_ptr(c.red); + ugreen = compat_ptr(c.green); + ublue = compat_ptr(c.blue); + + cmap.len = 1; + cmap.red = &red; + cmap.green = &green; + cmap.blue = &blue; + cmap.transp = NULL; + for (i = 0; i < c.count; i++) { + int err; + + if (get_user(red8, &ured[i]) || + get_user(green8, &ugreen[i]) || + get_user(blue8, &ublue[i])) + return -EFAULT; + + red = red8 << 8; + green = green8 << 8; + blue = blue8 << 8; + + cmap.start = c.index + i; + err = fb_set_cmap(&cmap, info); + if (err) + return err; + } + return 0; + } + case FBIOGETCMAP32: { + struct fbcmap32 c; + unsigned char __user *ured; + unsigned char __user *ugreen; + unsigned char __user *ublue; + struct fb_cmap *cmap = &info->cmap; + unsigned int index, i; + u8 red, green, blue; + + if (copy_from_user(&c, compat_ptr(arg), sizeof(c))) + return -EFAULT; + index = c.index; + ured = compat_ptr(c.red); + ugreen = compat_ptr(c.green); + ublue = compat_ptr(c.blue); + + if (index > cmap->len || c.count > cmap->len - index) + return -EINVAL; + + for (i = 0; i < c.count; i++) { + red = cmap->red[index + i] >> 8; + green = cmap->green[index + i] >> 8; + blue = cmap->blue[index + i] >> 8; + if (put_user(red, &ured[i]) || + put_user(green, &ugreen[i]) || + put_user(blue, &ublue[i])) + return -EFAULT; + } + return 0; + } + default: + return -ENOIOCTLCMD; + } +} +EXPORT_SYMBOL(sbusfb_compat_ioctl); +#endif -- cgit v1.3.1