* [PATCH v2 5/7] fbdev/core: Move logo functions into separate source file
2023-09-07 8:51 [PATCH v2 0/7] fbdev: Split off code for boot-up logo Thomas Zimmermann
` (3 preceding siblings ...)
2023-09-07 8:52 ` [PATCH v2 4/7] fbdev/core: Unexport logo helpers Thomas Zimmermann
@ 2023-09-07 8:52 ` Thomas Zimmermann
2023-09-07 8:52 ` [PATCH v2 6/7] fbdev/core: Remove empty internal helpers from fb_logo.c Thomas Zimmermann
2023-09-07 8:52 ` [PATCH v2 7/7] fbdev/core: Clean up include statements in fbmem.c Thomas Zimmermann
6 siblings, 0 replies; 8+ messages in thread
From: Thomas Zimmermann @ 2023-09-07 8:52 UTC (permalink / raw)
To: deller, daniel, javierm, sam, linux-fbdev, dri-devel
Cc: linux-kernel, Thomas Zimmermann
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>
---
drivers/video/fbdev/core/Makefile | 2 +
drivers/video/fbdev/core/fb_internal.h | 3 +-
drivers/video/fbdev/core/fb_logo.c | 518 ++++++++++++++++++++++++
drivers/video/fbdev/core/fbcon.c | 2 +
drivers/video/fbdev/core/fbmem.c | 519 -------------------------
5 files changed, 524 insertions(+), 520 deletions(-)
create mode 100644 drivers/video/fbdev/core/fb_logo.c
diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile
index edfde2948e5c..36d3156dc759 100644
--- a/drivers/video/fbdev/core/Makefile
+++ b/drivers/video/fbdev/core/Makefile
@@ -23,6 +23,8 @@ fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \
endif
endif
+fb-$(CONFIG_LOGO) += fb_logo.o
+
obj-$(CONFIG_FB_CFB_FILLRECT) += cfbfillrect.o
obj-$(CONFIG_FB_CFB_COPYAREA) += cfbcopyarea.o
obj-$(CONFIG_FB_CFB_IMAGEBLIT) += cfbimgblt.o
diff --git a/drivers/video/fbdev/core/fb_internal.h b/drivers/video/fbdev/core/fb_internal.h
index 1116faefa034..613832d335fe 100644
--- a/drivers/video/fbdev/core/fb_internal.h
+++ b/drivers/video/fbdev/core/fb_internal.h
@@ -20,7 +20,7 @@ static inline void fb_unregister_chrdev(void)
{ }
#endif
-/* fbmem.c */
+/* fb_logo.c */
#if defined(CONFIG_LOGO)
extern bool fb_center_logo;
extern int fb_logo_count;
@@ -37,6 +37,7 @@ static inline int fb_show_logo(struct fb_info *info, int rotate)
}
#endif /* CONFIG_LOGO */
+/* fbmem.c */
extern struct class *fb_class;
extern struct mutex registration_lock;
extern struct fb_info *registered_fb[FB_MAX];
diff --git a/drivers/video/fbdev/core/fb_logo.c b/drivers/video/fbdev/core/fb_logo.c
new file mode 100644
index 000000000000..6897f7a898fc
--- /dev/null
+++ b/drivers/video/fbdev/core/fb_logo.c
@@ -0,0 +1,518 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/fb.h>
+#include <linux/linux_logo.h>
+
+#include "fb_internal.h"
+
+bool fb_center_logo __read_mostly;
+int fb_logo_count __read_mostly = -1;
+
+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;
+}
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index f157a5a1dffc..63af6ab034b5 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -472,6 +472,7 @@ static int __init fb_console_setup(char *this_opt)
}
#endif
+#ifdef CONFIG_LOGO
if (!strncmp(options, "logo-pos:", 9)) {
options += 9;
if (!strcmp(options, "center"))
@@ -485,6 +486,7 @@ static int __init fb_console_setup(char *this_opt)
fb_logo_count = simple_strtol(options, &options, 0);
continue;
}
+#endif
}
return 1;
}
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)
{
--
2.42.0
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