fbdev/core: Move logo functions into separate source file

Move the fbdev function for displaying boot-up logos into their
own file fb_logo.c. Only build fb_logo.c if CONFIG_LOGO has been
selected. No functional changes.

v2:
	* include fb_internal.h (kernel test robot)
	* simplify option-parsing ifdefs
	* build fb_logo.o iff CONFIG_LOGO has been set

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230907085408.9354-6-tzimmermann@suse.de

1 files changed, 0 insertions, 519 deletions

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index ee25ac38737d..1a662a606ba6 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -21,7 +21,6 @@
 #include <linux/mman.h>
 #include <linux/vt.h>
 #include <linux/init.h>
-#include <linux/linux_logo.h>
 #include <linux/platform_device.h>
 #include <linux/console.h>
 #include <linux/kmod.h>
@@ -53,10 +52,6 @@ int num_registered_fb __read_mostly;
 	for (i = 0; i < FB_MAX; i++)		\
 		if (!registered_fb[i]) {} else
 
-bool fb_center_logo __read_mostly;
-
-int fb_logo_count __read_mostly = -1;
-
 struct fb_info *get_fb_info(unsigned int idx)
 {
 	struct fb_info *fb_info;
@@ -184,520 +179,6 @@ char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size
 }
 EXPORT_SYMBOL(fb_get_buffer_offset);
 
-#ifdef CONFIG_LOGO
-
-static inline unsigned int safe_shift(unsigned int d, int n)
-{
-	return n < 0 ? d >> -n : d << n;
-}
-
-static void fb_set_logocmap(struct fb_info *info,
-				   const struct linux_logo *logo)
-{
-	struct fb_cmap palette_cmap;
-	u16 palette_green[16];
-	u16 palette_blue[16];
-	u16 palette_red[16];
-	int i, j, n;
-	const unsigned char *clut = logo->clut;
-
-	palette_cmap.start = 0;
-	palette_cmap.len = 16;
-	palette_cmap.red = palette_red;
-	palette_cmap.green = palette_green;
-	palette_cmap.blue = palette_blue;
-	palette_cmap.transp = NULL;
-
-	for (i = 0; i < logo->clutsize; i += n) {
-		n = logo->clutsize - i;
-		/* palette_cmap provides space for only 16 colors at once */
-		if (n > 16)
-			n = 16;
-		palette_cmap.start = 32 + i;
-		palette_cmap.len = n;
-		for (j = 0; j < n; ++j) {
-			palette_cmap.red[j] = clut[0] << 8 | clut[0];
-			palette_cmap.green[j] = clut[1] << 8 | clut[1];
-			palette_cmap.blue[j] = clut[2] << 8 | clut[2];
-			clut += 3;
-		}
-		fb_set_cmap(&palette_cmap, info);
-	}
-}
-
-static void  fb_set_logo_truepalette(struct fb_info *info,
-					    const struct linux_logo *logo,
-					    u32 *palette)
-{
-	static const unsigned char mask[] = {
-		0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff
-	};
-	unsigned char redmask, greenmask, bluemask;
-	int redshift, greenshift, blueshift;
-	int i;
-	const unsigned char *clut = logo->clut;
-
-	/*
-	 * We have to create a temporary palette since console palette is only
-	 * 16 colors long.
-	 */
-	/* Bug: Doesn't obey msb_right ... (who needs that?) */
-	redmask   = mask[info->var.red.length   < 8 ? info->var.red.length   : 8];
-	greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
-	bluemask  = mask[info->var.blue.length  < 8 ? info->var.blue.length  : 8];
-	redshift   = info->var.red.offset   - (8 - info->var.red.length);
-	greenshift = info->var.green.offset - (8 - info->var.green.length);
-	blueshift  = info->var.blue.offset  - (8 - info->var.blue.length);
-
-	for (i = 0; i < logo->clutsize; i++) {
-		palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
-				 safe_shift((clut[1] & greenmask), greenshift) |
-				 safe_shift((clut[2] & bluemask), blueshift));
-		clut += 3;
-	}
-}
-
-static void fb_set_logo_directpalette(struct fb_info *info,
-					     const struct linux_logo *logo,
-					     u32 *palette)
-{
-	int redshift, greenshift, blueshift;
-	int i;
-
-	redshift = info->var.red.offset;
-	greenshift = info->var.green.offset;
-	blueshift = info->var.blue.offset;
-
-	for (i = 32; i < 32 + logo->clutsize; i++)
-		palette[i] = i << redshift | i << greenshift | i << blueshift;
-}
-
-static void fb_set_logo(struct fb_info *info,
-			       const struct linux_logo *logo, u8 *dst,
-			       int depth)
-{
-	int i, j, k;
-	const u8 *src = logo->data;
-	u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
-	u8 fg = 1, d;
-
-	switch (fb_get_color_depth(&info->var, &info->fix)) {
-	case 1:
-		fg = 1;
-		break;
-	case 2:
-		fg = 3;
-		break;
-	default:
-		fg = 7;
-		break;
-	}
-
-	if (info->fix.visual == FB_VISUAL_MONO01 ||
-	    info->fix.visual == FB_VISUAL_MONO10)
-		fg = ~((u8) (0xfff << info->var.green.length));
-
-	switch (depth) {
-	case 4:
-		for (i = 0; i < logo->height; i++)
-			for (j = 0; j < logo->width; src++) {
-				*dst++ = *src >> 4;
-				j++;
-				if (j < logo->width) {
-					*dst++ = *src & 0x0f;
-					j++;
-				}
-			}
-		break;
-	case 1:
-		for (i = 0; i < logo->height; i++) {
-			for (j = 0; j < logo->width; src++) {
-				d = *src ^ xor;
-				for (k = 7; k >= 0 && j < logo->width; k--) {
-					*dst++ = ((d >> k) & 1) ? fg : 0;
-					j++;
-				}
-			}
-		}
-		break;
-	}
-}
-
-/*
- * Three (3) kinds of logo maps exist.  linux_logo_clut224 (>16 colors),
- * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors).  Depending on
- * the visual format and color depth of the framebuffer, the DAC, the
- * pseudo_palette, and the logo data will be adjusted accordingly.
- *
- * Case 1 - linux_logo_clut224:
- * Color exceeds the number of console colors (16), thus we set the hardware DAC
- * using fb_set_cmap() appropriately.  The "needs_cmapreset"  flag will be set.
- *
- * For visuals that require color info from the pseudo_palette, we also construct
- * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
- * will be set.
- *
- * Case 2 - linux_logo_vga16:
- * The number of colors just matches the console colors, thus there is no need
- * to set the DAC or the pseudo_palette.  However, the bitmap is packed, ie,
- * each byte contains color information for two pixels (upper and lower nibble).
- * To be consistent with fb_imageblit() usage, we therefore separate the two
- * nibbles into separate bytes. The "depth" flag will be set to 4.
- *
- * Case 3 - linux_logo_mono:
- * This is similar with Case 2.  Each byte contains information for 8 pixels.
- * We isolate each bit and expand each into a byte. The "depth" flag will
- * be set to 1.
- */
-static struct logo_data {
-	int depth;
-	int needs_directpalette;
-	int needs_truepalette;
-	int needs_cmapreset;
-	const struct linux_logo *logo;
-} fb_logo __read_mostly;
-
-static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
-{
-	u32 size = width * height, i;
-
-	out += size - 1;
-
-	for (i = size; i--; )
-		*out-- = *in++;
-}
-
-static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
-{
-	int i, j, h = height - 1;
-
-	for (i = 0; i < height; i++)
-		for (j = 0; j < width; j++)
-			out[height * j + h - i] = *in++;
-}
-
-static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
-{
-	int i, j, w = width - 1;
-
-	for (i = 0; i < height; i++)
-		for (j = 0; j < width; j++)
-			out[height * (w - j) + i] = *in++;
-}
-
-static void fb_rotate_logo(struct fb_info *info, u8 *dst,
-			   struct fb_image *image, int rotate)
-{
-	u32 tmp;
-
-	if (rotate == FB_ROTATE_UD) {
-		fb_rotate_logo_ud(image->data, dst, image->width,
-				  image->height);
-		image->dx = info->var.xres - image->width - image->dx;
-		image->dy = info->var.yres - image->height - image->dy;
-	} else if (rotate == FB_ROTATE_CW) {
-		fb_rotate_logo_cw(image->data, dst, image->width,
-				  image->height);
-		swap(image->width, image->height);
-		tmp = image->dy;
-		image->dy = image->dx;
-		image->dx = info->var.xres - image->width - tmp;
-	} else if (rotate == FB_ROTATE_CCW) {
-		fb_rotate_logo_ccw(image->data, dst, image->width,
-				   image->height);
-		swap(image->width, image->height);
-		tmp = image->dx;
-		image->dx = image->dy;
-		image->dy = info->var.yres - image->height - tmp;
-	}
-
-	image->data = dst;
-}
-
-static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
-			    int rotate, unsigned int num)
-{
-	unsigned int x;
-
-	if (image->width > info->var.xres || image->height > info->var.yres)
-		return;
-
-	if (rotate == FB_ROTATE_UR) {
-		for (x = 0;
-		     x < num && image->dx + image->width <= info->var.xres;
-		     x++) {
-			info->fbops->fb_imageblit(info, image);
-			image->dx += image->width + 8;
-		}
-	} else if (rotate == FB_ROTATE_UD) {
-		u32 dx = image->dx;
-
-		for (x = 0; x < num && image->dx <= dx; x++) {
-			info->fbops->fb_imageblit(info, image);
-			image->dx -= image->width + 8;
-		}
-	} else if (rotate == FB_ROTATE_CW) {
-		for (x = 0;
-		     x < num && image->dy + image->height <= info->var.yres;
-		     x++) {
-			info->fbops->fb_imageblit(info, image);
-			image->dy += image->height + 8;
-		}
-	} else if (rotate == FB_ROTATE_CCW) {
-		u32 dy = image->dy;
-
-		for (x = 0; x < num && image->dy <= dy; x++) {
-			info->fbops->fb_imageblit(info, image);
-			image->dy -= image->height + 8;
-		}
-	}
-}
-
-static int fb_show_logo_line(struct fb_info *info, int rotate,
-			     const struct linux_logo *logo, int y,
-			     unsigned int n)
-{
-	u32 *palette = NULL, *saved_pseudo_palette = NULL;
-	unsigned char *logo_new = NULL, *logo_rotate = NULL;
-	struct fb_image image;
-
-	/* Return if the frame buffer is not mapped or suspended */
-	if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
-	    info->fbops->owner)
-		return 0;
-
-	image.depth = 8;
-	image.data = logo->data;
-
-	if (fb_logo.needs_cmapreset)
-		fb_set_logocmap(info, logo);
-
-	if (fb_logo.needs_truepalette ||
-	    fb_logo.needs_directpalette) {
-		palette = kmalloc(256 * 4, GFP_KERNEL);
-		if (palette == NULL)
-			return 0;
-
-		if (fb_logo.needs_truepalette)
-			fb_set_logo_truepalette(info, logo, palette);
-		else
-			fb_set_logo_directpalette(info, logo, palette);
-
-		saved_pseudo_palette = info->pseudo_palette;
-		info->pseudo_palette = palette;
-	}
-
-	if (fb_logo.depth <= 4) {
-		logo_new = kmalloc_array(logo->width, logo->height,
-					 GFP_KERNEL);
-		if (logo_new == NULL) {
-			kfree(palette);
-			if (saved_pseudo_palette)
-				info->pseudo_palette = saved_pseudo_palette;
-			return 0;
-		}
-		image.data = logo_new;
-		fb_set_logo(info, logo, logo_new, fb_logo.depth);
-	}
-
-	if (fb_center_logo) {
-		int xres = info->var.xres;
-		int yres = info->var.yres;
-
-		if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) {
-			xres = info->var.yres;
-			yres = info->var.xres;
-		}
-
-		while (n && (n * (logo->width + 8) - 8 > xres))
-			--n;
-		image.dx = (xres - (n * (logo->width + 8) - 8)) / 2;
-		image.dy = y ?: (yres - logo->height) / 2;
-	} else {
-		image.dx = 0;
-		image.dy = y;
-	}
-
-	image.width = logo->width;
-	image.height = logo->height;
-
-	if (rotate) {
-		logo_rotate = kmalloc_array(logo->width, logo->height,
-					    GFP_KERNEL);
-		if (logo_rotate)
-			fb_rotate_logo(info, logo_rotate, &image, rotate);
-	}
-
-	fb_do_show_logo(info, &image, rotate, n);
-
-	kfree(palette);
-	if (saved_pseudo_palette != NULL)
-		info->pseudo_palette = saved_pseudo_palette;
-	kfree(logo_new);
-	kfree(logo_rotate);
-	return image.dy + logo->height;
-}
-
-
-#ifdef CONFIG_FB_LOGO_EXTRA
-
-#define FB_LOGO_EX_NUM_MAX 10
-static struct logo_data_extra {
-	const struct linux_logo *logo;
-	unsigned int n;
-} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
-static unsigned int fb_logo_ex_num;
-
-void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
-{
-	if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
-		return;
-
-	fb_logo_ex[fb_logo_ex_num].logo = logo;
-	fb_logo_ex[fb_logo_ex_num].n = n;
-	fb_logo_ex_num++;
-}
-
-static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
-				  unsigned int yres)
-{
-	unsigned int i;
-
-	/* FIXME: logo_ex supports only truecolor fb. */
-	if (info->fix.visual != FB_VISUAL_TRUECOLOR)
-		fb_logo_ex_num = 0;
-
-	for (i = 0; i < fb_logo_ex_num; i++) {
-		if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
-			fb_logo_ex[i].logo = NULL;
-			continue;
-		}
-		height += fb_logo_ex[i].logo->height;
-		if (height > yres) {
-			height -= fb_logo_ex[i].logo->height;
-			fb_logo_ex_num = i;
-			break;
-		}
-	}
-	return height;
-}
-
-static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
-{
-	unsigned int i;
-
-	for (i = 0; i < fb_logo_ex_num; i++)
-		y = fb_show_logo_line(info, rotate,
-				      fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
-
-	return y;
-}
-
-#else /* !CONFIG_FB_LOGO_EXTRA */
-
-static inline int fb_prepare_extra_logos(struct fb_info *info,
-					 unsigned int height,
-					 unsigned int yres)
-{
-	return height;
-}
-
-static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
-{
-	return y;
-}
-
-#endif /* CONFIG_FB_LOGO_EXTRA */
-
-
-int fb_prepare_logo(struct fb_info *info, int rotate)
-{
-	int depth = fb_get_color_depth(&info->var, &info->fix);
-	unsigned int yres;
-	int height;
-
-	memset(&fb_logo, 0, sizeof(struct logo_data));
-
-	if (info->flags & FBINFO_MISC_TILEBLITTING ||
-	    info->fbops->owner || !fb_logo_count)
-		return 0;
-
-	if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
-		depth = info->var.blue.length;
-		if (info->var.red.length < depth)
-			depth = info->var.red.length;
-		if (info->var.green.length < depth)
-			depth = info->var.green.length;
-	}
-
-	if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
-		/* assume console colormap */
-		depth = 4;
-	}
-
-	/* Return if no suitable logo was found */
-	fb_logo.logo = fb_find_logo(depth);
-
-	if (!fb_logo.logo)
-		return 0;
-
-	if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
-		yres = info->var.yres;
-	else
-		yres = info->var.xres;
-
-	if (fb_logo.logo->height > yres) {
-		fb_logo.logo = NULL;
-		return 0;
-	}
-
-	/* What depth we asked for might be different from what we get */
-	if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
-		fb_logo.depth = 8;
-	else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
-		fb_logo.depth = 4;
-	else
-		fb_logo.depth = 1;
-
-
-	if (fb_logo.depth > 4 && depth > 4) {
-		switch (info->fix.visual) {
-		case FB_VISUAL_TRUECOLOR:
-			fb_logo.needs_truepalette = 1;
-			break;
-		case FB_VISUAL_DIRECTCOLOR:
-			fb_logo.needs_directpalette = 1;
-			fb_logo.needs_cmapreset = 1;
-			break;
-		case FB_VISUAL_PSEUDOCOLOR:
-			fb_logo.needs_cmapreset = 1;
-			break;
-		}
-	}
-
-	height = fb_logo.logo->height;
-	if (fb_center_logo)
-		height += (yres - fb_logo.logo->height) / 2;
-
-	return fb_prepare_extra_logos(info, height, yres);
-}
-
-int fb_show_logo(struct fb_info *info, int rotate)
-{
-	unsigned int count;
-	int y;
-
-	if (!fb_logo_count)
-		return 0;
-
-	count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
-	y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
-	y = fb_show_extra_logos(info, y, rotate);
-
-	return y;
-}
-#endif /* CONFIG_LOGO */
-
 int
 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
 {