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fbdev fixes and cleanups for 6.9-rc1: 

- Allow console fonts up to 64x128 pixels (Samuel Thibault)
 - Prevent division-by-zero in fb monitor code (Roman Smirnov)
 - Drop Renesas ARM platforms from Mobile LCDC framebuffer driver
   (Geert Uytterhoeven)
 - Various code cleanups in viafb, uveafb and mb862xxfb drivers by
   Aleksandr Burakov, Li Zhijian and Michael Ellerman
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Merge tag 'fbdev-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

Pull fbdev updates from Helge Deller:

 - Allow console fonts up to 64x128 pixels (Samuel Thibault)

 - Prevent division-by-zero in fb monitor code (Roman Smirnov)

 - Drop Renesas ARM platforms from Mobile LCDC framebuffer driver (Geert
   Uytterhoeven)

 - Various code cleanups in viafb, uveafb and mb862xxfb drivers by
   Aleksandr Burakov, Li Zhijian and Michael Ellerman

* tag 'fbdev-for-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: panel-tpo-td043mtea1: Convert sprintf() to sysfs_emit()
  fbmon: prevent division by zero in fb_videomode_from_videomode()
  fbcon: Increase maximum font width x height to 64 x 128
  fbdev: viafb: fix typo in hw_bitblt_1 and hw_bitblt_2
  fbdev: mb862xxfb: Fix defined but not used error
  fbdev: uvesafb: Convert sprintf/snprintf to sysfs_emit
  fbdev: Restrict FB_SH_MOBILE_LCDC to SuperH
This commit is contained in:
Linus Torvalds 2024-03-22 10:09:08 -07:00
parent 4073195aff 763865fed8
commit 4f55aa85a8
18 changed files with 110 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/firmware/efi/earlycon.c
View File

@ -252,7 +252,7 @@ static int __init efi_earlycon_setup(struct earlycon_device *device,
if (si->lfb_depth != 32)
return -ENODEV;
font = get_default_font(xres, yres, -1, -1);
font = get_default_font(xres, yres, NULL, NULL);
if (!font)
return -ENODEV;

2
drivers/video/fbdev/Kconfig
View File

@ -1523,7 +1523,7 @@ config FB_FSL_DIU
config FB_SH_MOBILE_LCDC
tristate "SuperH Mobile LCDC framebuffer support"
depends on FB && HAVE_CLK && HAS_IOMEM
depends on SUPERH || ARCH_RENESAS || COMPILE_TEST
depends on SUPERH || COMPILE_TEST
depends on FB_DEVICE
select FB_BACKLIGHT
select FB_DEFERRED_IO

15
drivers/video/fbdev/arkfb.c
View File

@ -622,8 +622,13 @@ static int arkfb_set_par(struct fb_info *info)
info->tileops = NULL;
/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
info->pixmap.blit_y = ~(u32)0;
if (bpp == 4) {
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
} else {
bitmap_fill(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
}
bitmap_fill(info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
offset_value = (info->var.xres_virtual * bpp) / 64;
screen_size = info->var.yres_virtual * info->fix.line_length;
@ -635,8 +640,10 @@ static int arkfb_set_par(struct fb_info *info)
info->tileops = &arkfb_tile_ops;
/* supports 8x16 tiles only */
info->pixmap.blit_x = 1 << (8 - 1);
info->pixmap.blit_y = 1 << (16 - 1);
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
bitmap_zero(info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
set_bit(16 - 1, info->pixmap.blit_y);
offset_value = info->var.xres_virtual / 16;
screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;

16
drivers/video/fbdev/core/fbcon.c
View File

@ -2479,12 +2479,12 @@ static int fbcon_set_font(struct vc_data *vc, const struct console_font *font,
h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
return -EINVAL;
if (font->width > 32 || font->height > 32)
if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT)
return -EINVAL;
/* Make sure drawing engine can handle the font */
if (!(info->pixmap.blit_x & BIT(font->width - 1)) ||
!(info->pixmap.blit_y & BIT(font->height - 1)))
if (!test_bit(font->width - 1, info->pixmap.blit_x) ||
!test_bit(font->height - 1, info->pixmap.blit_y))
return -EINVAL;
/* Make sure driver can handle the font length */
@ -3050,8 +3050,8 @@ void fbcon_get_requirement(struct fb_info *info,
vc = vc_cons[i].d;
if (vc && vc->vc_mode == KD_TEXT &&
info->node == con2fb_map[i]) {
caps->x |= 1 << (vc->vc_font.width - 1);
caps->y |= 1 << (vc->vc_font.height - 1);
set_bit(vc->vc_font.width - 1, caps->x);
set_bit(vc->vc_font.height - 1, caps->y);
charcnt = vc->vc_font.charcount;
if (caps->len < charcnt)
caps->len = charcnt;
@ -3062,8 +3062,10 @@ void fbcon_get_requirement(struct fb_info *info,
if (vc && vc->vc_mode == KD_TEXT &&
info->node == con2fb_map[fg_console]) {
caps->x = 1 << (vc->vc_font.width - 1);
caps->y = 1 << (vc->vc_font.height - 1);
bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH);
set_bit(vc->vc_font.width - 1, caps->x);
bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT);
set_bit(vc->vc_font.height - 1, caps->y);
caps->len = vc->vc_font.charcount;
}
}

12
drivers/video/fbdev/core/fbmem.c
View File

@ -212,8 +212,8 @@ static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
fbcon_get_requirement(info, &caps);
info->fbops->fb_get_caps(info, &fbcaps, var);
if (((fbcaps.x ^ caps.x) & caps.x) ||
((fbcaps.y ^ caps.y) & caps.y) ||
if (!bitmap_subset(caps.x, fbcaps.x, FB_MAX_BLIT_WIDTH) ||
!bitmap_subset(caps.y, fbcaps.y, FB_MAX_BLIT_HEIGHT) ||
(fbcaps.len < caps.len))
err = -EINVAL;
@ -420,11 +420,11 @@ static int do_register_framebuffer(struct fb_info *fb_info)
}
fb_info->pixmap.offset = 0;
if (!fb_info->pixmap.blit_x)
fb_info->pixmap.blit_x = ~(u32)0;
if (bitmap_empty(fb_info->pixmap.blit_x, FB_MAX_BLIT_WIDTH))
bitmap_fill(fb_info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
if (!fb_info->pixmap.blit_y)
fb_info->pixmap.blit_y = ~(u32)0;
if (bitmap_empty(fb_info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT))
bitmap_fill(fb_info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
if (!fb_info->modelist.prev || !fb_info->modelist.next)
INIT_LIST_HEAD(&fb_info->modelist);

7
drivers/video/fbdev/core/fbmon.c
View File

@ -1311,7 +1311,7 @@ int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_inf
int fb_videomode_from_videomode(const struct videomode *vm,
struct fb_videomode *fbmode)
{
unsigned int htotal, vtotal;
unsigned int htotal, vtotal, total;
fbmode->xres = vm->hactive;
fbmode->left_margin = vm->hback_porch;
@ -1344,8 +1344,9 @@ int fb_videomode_from_videomode(const struct videomode *vm,
vtotal = vm->vactive + vm->vfront_porch + vm->vback_porch +
vm->vsync_len;
/* prevent division by zero */
if (htotal && vtotal) {
fbmode->refresh = vm->pixelclock / (htotal * vtotal);
total = htotal * vtotal;
if (total) {
fbmode->refresh = vm->pixelclock / total;
/* a mode must have htotal and vtotal != 0 or it is invalid */
} else {
fbmode->refresh = 0;

15
drivers/video/fbdev/core/svgalib.c
View File

@ -354,12 +354,19 @@ void svga_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
{
if (var->bits_per_pixel == 0) {
/* can only support 256 8x16 bitmap */
caps->x = 1 << (8 - 1);
caps->y = 1 << (16 - 1);
bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, caps->x);
bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT);
set_bit(16 - 1, caps->y);
caps->len = 256;
} else {
caps->x = (var->bits_per_pixel == 4) ? 1 << (8 - 1) : ~(u32)0;
caps->y = ~(u32)0;
if (var->bits_per_pixel == 4) {
bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, caps->x);
} else {
bitmap_fill(caps->x, FB_MAX_BLIT_WIDTH);
}
bitmap_fill(caps->y, FB_MAX_BLIT_HEIGHT);
caps->len = ~(u32)0;
}
}

18
drivers/video/fbdev/mb862xx/mb862xxfbdrv.c
View File

@ -32,15 +32,6 @@
#define CARMINE_MEM_SIZE 0x8000000
#define DRV_NAME "mb862xxfb"
#if defined(CONFIG_SOCRATES)
static struct mb862xx_gc_mode socrates_gc_mode = {
/* Mode for Prime View PM070WL4 TFT LCD Panel */
{ "800x480", 45, 800, 480, 40000, 86, 42, 33, 10, 128, 2, 0, 0, 0 },
/* 16 bits/pixel, 16MB, 133MHz, SDRAM memory mode value */
16, 0x1000000, GC_CCF_COT_133, 0x4157ba63
};
#endif
/* Helpers */
static inline int h_total(struct fb_var_screeninfo *var)
{
@ -666,6 +657,15 @@ static int mb862xx_gdc_init(struct mb862xxfb_par *par)
return 0;
}
#if defined(CONFIG_SOCRATES)
static struct mb862xx_gc_mode socrates_gc_mode = {
/* Mode for Prime View PM070WL4 TFT LCD Panel */
{ "800x480", 45, 800, 480, 40000, 86, 42, 33, 10, 128, 2, 0, 0, 0 },
/* 16 bits/pixel, 16MB, 133MHz, SDRAM memory mode value */
16, 0x1000000, GC_CCF_COT_133, 0x4157ba63
};
#endif
static int of_platform_mb862xx_probe(struct platform_device *ofdev)
{
struct device_node *np = ofdev->dev.of_node;

13
drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td043mtea1.c
View File

@ -225,17 +225,12 @@ static ssize_t tpo_td043_gamma_show(struct device *dev,
{
struct panel_drv_data *ddata = dev_get_drvdata(dev);
ssize_t len = 0;
int ret;
int i;
for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++) {
ret = snprintf(buf + len, PAGE_SIZE - len, "%u ",
ddata->gamma[i]);
if (ret < 0)
return ret;
len += ret;
}
buf[len - 1] = '\n';
for (i = 0; i < ARRAY_SIZE(ddata->gamma); i++)
len += sysfs_emit_at(buf, len, "%u ", ddata->gamma[i]);
if (len)
buf[len - 1] = '\n';
return len;
}

15
drivers/video/fbdev/s3fb.c
View File

@ -617,8 +617,13 @@ static int s3fb_set_par(struct fb_info *info)
info->tileops = NULL;
/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
info->pixmap.blit_y = ~(u32)0;
if (bpp == 4) {
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
} else {
bitmap_fill(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
}
bitmap_fill(info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
offset_value = (info->var.xres_virtual * bpp) / 64;
screen_size = info->var.yres_virtual * info->fix.line_length;
@ -630,8 +635,10 @@ static int s3fb_set_par(struct fb_info *info)
info->tileops = fasttext ? &s3fb_fast_tile_ops : &s3fb_tile_ops;
/* supports 8x16 tiles only */
info->pixmap.blit_x = 1 << (8 - 1);
info->pixmap.blit_y = 1 << (16 - 1);
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
bitmap_zero(info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
set_bit(16 - 1, info->pixmap.blit_y);
offset_value = info->var.xres_virtual / 16;
screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;

2
drivers/video/fbdev/uvesafb.c
View File

@ -1546,7 +1546,7 @@ static ssize_t uvesafb_show_vbe_ver(struct device *dev,
struct fb_info *info = dev_get_drvdata(dev);
struct uvesafb_par *par = info->par;
return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
return sysfs_emit(buf, "%.4x\n", par->vbe_ib.vbe_version);
}
static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);

6
drivers/video/fbdev/vga16fb.c
View File

@ -1353,7 +1353,11 @@ static int vga16fb_probe(struct platform_device *dev)
info->var = vga16fb_defined;
info->fix = vga16fb_fix;
/* supports rectangles with widths of multiples of 8 */
info->pixmap.blit_x = 1 << 7 | 1 << 15 | 1 << 23 | 1 << 31;
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
set_bit(16 - 1, info->pixmap.blit_x);
set_bit(24 - 1, info->pixmap.blit_x);
set_bit(32 - 1, info->pixmap.blit_x);
info->flags = FBINFO_HWACCEL_YPAN;
i = (info->var.bits_per_pixel == 8) ? 256 : 16;

4
drivers/video/fbdev/via/accel.c
View File

@ -115,7 +115,7 @@ static int hw_bitblt_1(void __iomem *engine, u8 op, u32 width, u32 height,
if (op != VIA_BITBLT_FILL) {
tmp = src_mem ? 0 : src_addr;
if (dst_addr & 0xE0000007) {
if (tmp & 0xE0000007) {
printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
"address %X\n", tmp);
return -EINVAL;
@ -260,7 +260,7 @@ static int hw_bitblt_2(void __iomem *engine, u8 op, u32 width, u32 height,
writel(tmp, engine + 0x18);
tmp = src_mem ? 0 : src_addr;
if (dst_addr & 0xE0000007) {
if (tmp & 0xE0000007) {
printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
"address %X\n", tmp);
return -EINVAL;

15
drivers/video/fbdev/vt8623fb.c
View File

@ -390,8 +390,13 @@ static int vt8623fb_set_par(struct fb_info *info)
info->tileops = NULL;
/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
info->pixmap.blit_y = ~(u32)0;
if (bpp == 4) {
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
} else {
bitmap_fill(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
}
bitmap_fill(info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
offset_value = (info->var.xres_virtual * bpp) / 64;
fetch_value = ((info->var.xres * bpp) / 128) + 4;
@ -408,8 +413,10 @@ static int vt8623fb_set_par(struct fb_info *info)
info->tileops = &vt8623fb_tile_ops;
/* supports 8x16 tiles only */
info->pixmap.blit_x = 1 << (8 - 1);
info->pixmap.blit_y = 1 << (16 - 1);
bitmap_zero(info->pixmap.blit_x, FB_MAX_BLIT_WIDTH);
set_bit(8 - 1, info->pixmap.blit_x);
bitmap_zero(info->pixmap.blit_y, FB_MAX_BLIT_HEIGHT);
set_bit(16 - 1, info->pixmap.blit_y);
offset_value = info->var.xres_virtual / 16;
fetch_value = (info->var.xres / 8) + 8;

2
drivers/video/sticore.c
View File

@ -529,7 +529,7 @@ sti_select_fbfont(struct sti_cooked_rom *cooked_rom, const char *fbfont_name)
if (fbfont_name && strlen(fbfont_name))
fbfont = find_font(fbfont_name);
if (!fbfont)
fbfont = get_default_font(1024,768, ~(u32)0, ~(u32)0);
fbfont = get_default_font(1024, 768, NULL, NULL);
if (!fbfont)
return NULL;

18
include/linux/fb.h
View File

@ -145,9 +145,13 @@ struct fb_event {
void *data;
};
/* Enough for the VT console needs, see its max_font_width/height */
#define FB_MAX_BLIT_WIDTH 64
#define FB_MAX_BLIT_HEIGHT 128
struct fb_blit_caps {
u32 x;
u32 y;
DECLARE_BITMAP(x, FB_MAX_BLIT_WIDTH);
DECLARE_BITMAP(y, FB_MAX_BLIT_HEIGHT);
u32 len;
u32 flags;
};
@ -194,10 +198,12 @@ struct fb_pixmap {
u32 scan_align; /* alignment per scanline */
u32 access_align; /* alignment per read/write (bits) */
u32 flags; /* see FB_PIXMAP_* */
u32 blit_x; /* supported bit block dimensions (1-32)*/
u32 blit_y; /* Format: blit_x = 1 << (width - 1) */
/* blit_y = 1 << (height - 1) */
/* if 0, will be set to 0xffffffff (all)*/
/* supported bit block dimensions */
/* Format: test_bit(width - 1, blit_x) */
/* test_bit(height - 1, blit_y) */
/* if zero, will be set to full (all) */
DECLARE_BITMAP(blit_x, FB_MAX_BLIT_WIDTH);
DECLARE_BITMAP(blit_y, FB_MAX_BLIT_HEIGHT);
/* access methods */
void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);

3
include/linux/font.h
View File

@ -57,7 +57,8 @@ extern const struct font_desc *find_font(const char *name);
/* Get the default font for a specific screen size */
extern const struct font_desc *get_default_font(int xres, int yres,
u32 font_w, u32 font_h);
unsigned long *font_w,
unsigned long *font_h);
/* Max. length for the name of a predefined font */
#define MAX_FONT_NAME 32

15
lib/fonts/fonts.c
View File

@ -96,18 +96,21 @@ EXPORT_SYMBOL(find_font);
* get_default_font - get default font
* @xres: screen size of X
* @yres: screen size of Y
* @font_w: bit array of supported widths (1 - 32)
* @font_h: bit array of supported heights (1 - 32)
* @font_w: bit array of supported widths (1 - FB_MAX_BLIT_WIDTH)
* @font_h: bit array of supported heights (1 - FB_MAX_BLIT_HEIGHT)
*
* Get the default font for a specified screen size.
* Dimensions are in pixels.
*
* font_w or font_h being NULL means all values are supported.
*
* Returns %NULL if no font is found, or a pointer to the
* chosen font.
*
*/
const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
u32 font_h)
const struct font_desc *get_default_font(int xres, int yres,
unsigned long *font_w,
unsigned long *font_h)
{
int i, c, cc, res;
const struct font_desc *f, *g;
@ -135,8 +138,8 @@ const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
if (res > 20)
c += 20 - res;
if ((font_w & (1U << (f->width - 1))) &&
(font_h & (1U << (f->height - 1))))
if ((!font_w || test_bit(f->width - 1, font_w)) &&
(!font_h || test_bit(f->height - 1, font_h)))
c += 1000;
if (c > cc) {