[PATCH 0/7] fbdev: Split off code for boot-up logo

[PATCH 0/7] fbdev: Split off code for boot-up logo

[Thomas Zimmermann]

The boot-up logo is a feature of the fbcon console; with only a few
external callers. Move it from the core fbdev code into its own file.

Patches 1 and 2 remove the logo setup from fbdev drivers. The logo
requires a configured output, which is provided by the framebuffer
console. Drivers should not implement their own logo.

Patches 3 to 6 move the code for the boot-up logo into its own file
and add a number of simple cleanups. It's now separate from the core
fbdev code that maintains the display framebuffers.

Patch 7 then removes a number of unecessary include statements from
fbmem.c.

Thomas Zimmermann (7):
  fbdev/au1200fb: Do not display boot-up logo
  fbdev/mmp/mmpfb: Do not display boot-up logo
  fbdev/core: Fix style of code for boot-up logo
  fbdev/core: Move logo functions into separate source file
  fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected
  fbdev/core: Remove empty internal helpers from fb_logo.c
  fbdev/core: Clean up include statements in fbmem.c

 drivers/video/fbdev/au1200fb.c         |   9 -
 drivers/video/fbdev/core/Makefile      |   2 +
 drivers/video/fbdev/core/fb_internal.h |  17 +
 drivers/video/fbdev/core/fb_logo.c     | 509 +++++++++++++++++++++++
 drivers/video/fbdev/core/fbcon.c       |   4 +
 drivers/video/fbdev/core/fbmem.c       | 542 +------------------------
 drivers/video/fbdev/mmp/fb/mmpfb.c     |   7 -
 include/linux/fb.h                     |   5 -
 8 files changed, 533 insertions(+), 562 deletions(-)
 create mode 100644 drivers/video/fbdev/core/fb_logo.c

-- 
2.41.0

[PATCH 1/7] fbdev/au1200fb: Do not display boot-up logo

[Thomas Zimmermann]

The fbcon module takes care of displaying the logo, if any. Remove
the code form au1200fb. If we want to display the logo without fbcon,
we should implement this in the fbdev core code.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/au1200fb.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/video/fbdev/au1200fb.c b/drivers/video/fbdev/au1200fb.c
index c137d6afe484..98afd385c49c 100644
--- a/drivers/video/fbdev/au1200fb.c
+++ b/drivers/video/fbdev/au1200fb.c
@@ -1719,15 +1719,6 @@ static int au1200fb_drv_probe(struct platform_device *dev)
 		}
 
 		au1200fb_fb_set_par(fbi);
-
-#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
-		if (plane == 0)
-			if (fb_prepare_logo(fbi, FB_ROTATE_UR)) {
-				/* Start display and show logo on boot */
-				fb_set_cmap(&fbi->cmap, fbi);
-				fb_show_logo(fbi, FB_ROTATE_UR);
-			}
-#endif
 	}
 
 	/* Now hook interrupt too */
-- 
2.41.0

[PATCH 2/7] fbdev/mmp/mmpfb: Do not display boot-up logo

[Thomas Zimmermann]

The fbcon module takes care of displaying the logo, if any. Remove
the code form mmpfb. If we want to display the logo without fbcon,
we should implement this in the fbdev core code.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/mmp/fb/mmpfb.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/video/fbdev/mmp/fb/mmpfb.c b/drivers/video/fbdev/mmp/fb/mmpfb.c
index 42a87474bcea..2d9797c6fb3e 100644
--- a/drivers/video/fbdev/mmp/fb/mmpfb.c
+++ b/drivers/video/fbdev/mmp/fb/mmpfb.c
@@ -628,13 +628,6 @@ static int mmpfb_probe(struct platform_device *pdev)
 	dev_info(fbi->dev, "loaded to /dev/fb%d <%s>.\n",
 		info->node, info->fix.id);
 
-#ifdef CONFIG_LOGO
-	if (fbi->fb_start) {
-		fb_prepare_logo(info, 0);
-		fb_show_logo(info, 0);
-	}
-#endif
-
 	return 0;
 
 failed_clear_info:
-- 
2.41.0

[PATCH 3/7] fbdev/core: Fix style of code for boot-up logo

[Thomas Zimmermann]

Fix a number of warnings from checkpatch.pl in this code before
moving it into a separate file. This includes

 * Prefer 'unsigned int' to bare use of 'unsigned'
 * space required after that ',' (ctx:VxV)
 * space prohibited after that open parenthesis '('
 * suspect code indent for conditional statements (16, 32)
 * braces {} are not necessary for single statement blocks

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/core/fbmem.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index ee44a46a66be..98e1847e4287 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -186,7 +186,7 @@ EXPORT_SYMBOL(fb_get_buffer_offset);
 
 #ifdef CONFIG_LOGO
 
-static inline unsigned safe_shift(unsigned d, int n)
+static inline unsigned int safe_shift(unsigned int d, int n)
 {
 	return n < 0 ? d >> -n : d << n;
 }
@@ -229,7 +229,9 @@ 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 };
+	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;
@@ -247,7 +249,7 @@ static void  fb_set_logo_truepalette(struct fb_info *info,
 	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++) {
+	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));
@@ -371,7 +373,7 @@ static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
 
 	for (i = 0; i < height; i++)
 		for (j = 0; j < width; j++)
-				out[height * j + h - i] = *in++;
+			out[height * j + h - i] = *in++;
 }
 
 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
@@ -636,9 +638,8 @@ int fb_prepare_logo(struct fb_info *info, int rotate)
 	/* Return if no suitable logo was found */
 	fb_logo.logo = fb_find_logo(depth);
 
-	if (!fb_logo.logo) {
+	if (!fb_logo.logo)
 		return 0;
-	}
 
 	if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
 		yres = info->var.yres;
-- 
2.41.0

[PATCH 4/7] fbdev/core: Move logo functions into separate source file

[Thomas Zimmermann]

Move the fbdev function for displaying boot-up logos into their
own file fb_logo.c. The file can later be build depending on the
state of CONFIG_LOGO. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/core/Makefile      |   1 +
 drivers/video/fbdev/core/fb_internal.h |   6 +
 drivers/video/fbdev/core/fb_logo.c     | 533 +++++++++++++++++++++++++
 drivers/video/fbdev/core/fbmem.c       | 524 ------------------------
 include/linux/fb.h                     |   5 -
 5 files changed, 540 insertions(+), 529 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..adce31155e92 100644
--- a/drivers/video/fbdev/core/Makefile
+++ b/drivers/video/fbdev/core/Makefile
@@ -2,6 +2,7 @@
 obj-$(CONFIG_FB_NOTIFY)           += fb_notify.o
 obj-$(CONFIG_FB_CORE)             += fb.o
 fb-y                              := fb_info.o \
+                                     fb_logo.o \
                                      fbmem.o fbcmap.o \
                                      modedb.o fbcvt.o fb_cmdline.o fb_io_fops.o
 ifdef CONFIG_FB
diff --git a/drivers/video/fbdev/core/fb_internal.h b/drivers/video/fbdev/core/fb_internal.h
index 4c8d509a0026..79e57a5e6e7e 100644
--- a/drivers/video/fbdev/core/fb_internal.h
+++ b/drivers/video/fbdev/core/fb_internal.h
@@ -20,6 +20,12 @@ static inline void fb_unregister_chrdev(void)
 { }
 #endif
 
+/* fb_logo.c */
+extern bool fb_center_logo;
+extern int fb_logo_count;
+int fb_prepare_logo(struct fb_info *fb_info, int rotate);
+int fb_show_logo(struct fb_info *fb_info, int rotate);
+
 /* fbmem.c */
 extern struct class *fb_class;
 extern struct mutex registration_lock;
diff --git a/drivers/video/fbdev/core/fb_logo.c b/drivers/video/fbdev/core/fb_logo.c
new file mode 100644
index 000000000000..76ba5a2bebae
--- /dev/null
+++ b/drivers/video/fbdev/core/fb_logo.c
@@ -0,0 +1,533 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/export.h>
+#include <linux/fb.h>
+#include <linux/linux_logo.h>
+
+bool fb_center_logo __read_mostly;
+int fb_logo_count __read_mostly = -1;
+
+#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);
+}
+EXPORT_SYMBOL(fb_prepare_logo);
+
+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;
+}
+EXPORT_SYMBOL(fb_show_logo);
+#else
+int fb_prepare_logo(struct fb_info *info, int rotate)
+{
+	return 0;
+}
+EXPORT_SYMBOL(fb_prepare_logo);
+
+int fb_show_logo(struct fb_info *info, int rotate)
+{
+	return 0;
+}
+EXPORT_SYMBOL(fb_show_logo);
+#endif /* CONFIG_LOGO */
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 98e1847e4287..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;
@@ -184,525 +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;
-}
-#else
-int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
-int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
-#endif /* CONFIG_LOGO */
-EXPORT_SYMBOL(fb_prepare_logo);
-EXPORT_SYMBOL(fb_show_logo);
-
 int
 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
 {
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 16c3e6d6c55d..d110676c9c83 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -591,8 +591,6 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 /* drivers/video/fbmem.c */
 extern int register_framebuffer(struct fb_info *fb_info);
 extern void unregister_framebuffer(struct fb_info *fb_info);
-extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
-extern int fb_show_logo(struct fb_info *fb_info, int rotate);
 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
 				u32 height, u32 shift_high, u32 shift_low, u32 mod);
@@ -603,9 +601,6 @@ extern int fb_get_color_depth(struct fb_var_screeninfo *var,
 extern int fb_get_options(const char *name, char **option);
 extern int fb_new_modelist(struct fb_info *info);
 
-extern bool fb_center_logo;
-extern int fb_logo_count;
-
 static inline void lock_fb_info(struct fb_info *info)
 {
 	mutex_lock(&info->lock);
-- 
2.41.0

[PATCH 5/7] fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected

[Thomas Zimmermann]

Only build fb_logo.c if CONFIG_LOGO has been selected. Otherwise
provide empty implementations of the contained interfaces and avoid
using the exported variables.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/core/Makefile      |  3 ++-
 drivers/video/fbdev/core/fb_internal.h | 11 +++++++++++
 drivers/video/fbdev/core/fb_logo.c     | 14 --------------
 drivers/video/fbdev/core/fbcon.c       |  4 ++++
 4 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile
index adce31155e92..36d3156dc759 100644
--- a/drivers/video/fbdev/core/Makefile
+++ b/drivers/video/fbdev/core/Makefile
@@ -2,7 +2,6 @@
 obj-$(CONFIG_FB_NOTIFY)           += fb_notify.o
 obj-$(CONFIG_FB_CORE)             += fb.o
 fb-y                              := fb_info.o \
-                                     fb_logo.o \
                                      fbmem.o fbcmap.o \
                                      modedb.o fbcvt.o fb_cmdline.o fb_io_fops.o
 ifdef CONFIG_FB
@@ -24,6 +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 79e57a5e6e7e..613832d335fe 100644
--- a/drivers/video/fbdev/core/fb_internal.h
+++ b/drivers/video/fbdev/core/fb_internal.h
@@ -21,10 +21,21 @@ static inline void fb_unregister_chrdev(void)
 #endif
 
 /* fb_logo.c */
+#if defined(CONFIG_LOGO)
 extern bool fb_center_logo;
 extern int fb_logo_count;
 int fb_prepare_logo(struct fb_info *fb_info, int rotate);
 int fb_show_logo(struct fb_info *fb_info, int rotate);
+#else
+static inline int fb_prepare_logo(struct fb_info *info, int rotate)
+{
+	return 0;
+}
+static inline int fb_show_logo(struct fb_info *info, int rotate)
+{
+	return 0;
+}
+#endif /* CONFIG_LOGO */
 
 /* fbmem.c */
 extern struct class *fb_class;
diff --git a/drivers/video/fbdev/core/fb_logo.c b/drivers/video/fbdev/core/fb_logo.c
index 76ba5a2bebae..cde0a330b2ad 100644
--- a/drivers/video/fbdev/core/fb_logo.c
+++ b/drivers/video/fbdev/core/fb_logo.c
@@ -7,7 +7,6 @@
 bool fb_center_logo __read_mostly;
 int fb_logo_count __read_mostly = -1;
 
-#ifdef CONFIG_LOGO
 static inline unsigned int safe_shift(unsigned int d, int n)
 {
 	return n < 0 ? d >> -n : d << n;
@@ -518,16 +517,3 @@ int fb_show_logo(struct fb_info *info, int rotate)
 	return y;
 }
 EXPORT_SYMBOL(fb_show_logo);
-#else
-int fb_prepare_logo(struct fb_info *info, int rotate)
-{
-	return 0;
-}
-EXPORT_SYMBOL(fb_prepare_logo);
-
-int fb_show_logo(struct fb_info *info, int rotate)
-{
-	return 0;
-}
-EXPORT_SYMBOL(fb_show_logo);
-#endif /* CONFIG_LOGO */
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index f157a5a1dffc..24b038510a71 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -474,15 +474,19 @@ static int __init fb_console_setup(char *this_opt)
 
 		if (!strncmp(options, "logo-pos:", 9)) {
 			options += 9;
+#ifdef CONFIG_LOGO
 			if (!strcmp(options, "center"))
 				fb_center_logo = true;
+#endif
 			continue;
 		}
 
 		if (!strncmp(options, "logo-count:", 11)) {
 			options += 11;
+#ifdef CONFIG_LOGO
 			if (*options)
 				fb_logo_count = simple_strtol(options, &options, 0);
+#endif
 			continue;
 		}
 	}
-- 
2.41.0

[PATCH 6/7] fbdev/core: Remove empty internal helpers from fb_logo.c

[Thomas Zimmermann]

Remove the two empty helpers for the case the CONFIG_FB_LOGO_EXTRA
has not been set. They are internal functions and only called once.
Providing empty replacements seems like overkill. Instead protect
the call sites with a test for CONFIG_FB_LOGO_EXTRA.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/core/fb_logo.c | 22 ++++++----------------
 1 file changed, 6 insertions(+), 16 deletions(-)

diff --git a/drivers/video/fbdev/core/fb_logo.c b/drivers/video/fbdev/core/fb_logo.c
index cde0a330b2ad..9cff78332858 100644
--- a/drivers/video/fbdev/core/fb_logo.c
+++ b/drivers/video/fbdev/core/fb_logo.c
@@ -412,21 +412,6 @@ static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
 
 	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)
@@ -497,8 +482,11 @@ int fb_prepare_logo(struct fb_info *info, int rotate)
 	height = fb_logo.logo->height;
 	if (fb_center_logo)
 		height += (yres - fb_logo.logo->height) / 2;
+#ifdef CONFIG_FB_LOGO_EXTRA
+	height = fb_prepare_extra_logos(info, height, yres);
+#endif
 
-	return fb_prepare_extra_logos(info, height, yres);
+	return height;
 }
 EXPORT_SYMBOL(fb_prepare_logo);
 
@@ -512,7 +500,9 @@ int fb_show_logo(struct fb_info *info, int rotate)
 
 	count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
 	y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
+#ifdef CONFIG_FB_LOGO_EXTRA
 	y = fb_show_extra_logos(info, y, rotate);
+#endif
 
 	return y;
 }
-- 
2.41.0

[PATCH 7/7] fbdev/core: Clean up include statements in fbmem.c

[Thomas Zimmermann]

Remove all unnecessary include statements from fbmem.c. Most of
them were for functionality that has meanwhile been moved into
other files.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/video/fbdev/core/fbmem.c | 19 +------------------
 1 file changed, 1 insertion(+), 18 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 1a662a606ba6..fc206755f5f6 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -11,29 +11,12 @@
  * for more details.
  */
 
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/vt.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
 #include <linux/console.h>
-#include <linux/kmod.h>
-#include <linux/err.h>
-#include <linux/device.h>
-#include <linux/efi.h>
+#include <linux/export.h>
 #include <linux/fb.h>
 #include <linux/fbcon.h>
-#include <linux/mem_encrypt.h>
-#include <linux/pci.h>
 
 #include <video/nomodeset.h>
-#include <video/vga.h>
 
 #include "fb_internal.h"
 
-- 
2.41.0

Re: [PATCH 4/7] fbdev/core: Move logo functions into separate source file

[kernel test robot]

Hi Thomas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on next-20230829]
[cannot apply to linus/master v6.5]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Thomas-Zimmermann/fbdev-au1200fb-Do-not-display-boot-up-logo/20230829-222419
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230829142109.4521-5-tzimmermann%40suse.de
patch subject: [PATCH 4/7] fbdev/core: Move logo functions into separate source file
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20230829/202308292302.bkYBkvrg-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230829/202308292302.bkYBkvrg-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308292302.bkYBkvrg-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/video/fbdev/core/fb_logo.c:433:5: warning: no previous prototype for 'fb_prepare_logo' [-Wmissing-prototypes]
     433 | int fb_prepare_logo(struct fb_info *info, int rotate)
         |     ^~~~~~~~~~~~~~~
>> drivers/video/fbdev/core/fb_logo.c:506:5: warning: no previous prototype for 'fb_show_logo' [-Wmissing-prototypes]
     506 | int fb_show_logo(struct fb_info *info, int rotate)
         |     ^~~~~~~~~~~~


vim +/fb_prepare_logo +433 drivers/video/fbdev/core/fb_logo.c

   432	
 > 433	int fb_prepare_logo(struct fb_info *info, int rotate)
   434	{
   435		int depth = fb_get_color_depth(&info->var, &info->fix);
   436		unsigned int yres;
   437		int height;
   438	
   439		memset(&fb_logo, 0, sizeof(struct logo_data));
   440	
   441		if (info->flags & FBINFO_MISC_TILEBLITTING ||
   442		    info->fbops->owner || !fb_logo_count)
   443			return 0;
   444	
   445		if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
   446			depth = info->var.blue.length;
   447			if (info->var.red.length < depth)
   448				depth = info->var.red.length;
   449			if (info->var.green.length < depth)
   450				depth = info->var.green.length;
   451		}
   452	
   453		if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
   454			/* assume console colormap */
   455			depth = 4;
   456		}
   457	
   458		/* Return if no suitable logo was found */
   459		fb_logo.logo = fb_find_logo(depth);
   460	
   461		if (!fb_logo.logo)
   462			return 0;
   463	
   464		if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
   465			yres = info->var.yres;
   466		else
   467			yres = info->var.xres;
   468	
   469		if (fb_logo.logo->height > yres) {
   470			fb_logo.logo = NULL;
   471			return 0;
   472		}
   473	
   474		/* What depth we asked for might be different from what we get */
   475		if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
   476			fb_logo.depth = 8;
   477		else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
   478			fb_logo.depth = 4;
   479		else
   480			fb_logo.depth = 1;
   481	
   482	
   483		if (fb_logo.depth > 4 && depth > 4) {
   484			switch (info->fix.visual) {
   485			case FB_VISUAL_TRUECOLOR:
   486				fb_logo.needs_truepalette = 1;
   487				break;
   488			case FB_VISUAL_DIRECTCOLOR:
   489				fb_logo.needs_directpalette = 1;
   490				fb_logo.needs_cmapreset = 1;
   491				break;
   492			case FB_VISUAL_PSEUDOCOLOR:
   493				fb_logo.needs_cmapreset = 1;
   494				break;
   495			}
   496		}
   497	
   498		height = fb_logo.logo->height;
   499		if (fb_center_logo)
   500			height += (yres - fb_logo.logo->height) / 2;
   501	
   502		return fb_prepare_extra_logos(info, height, yres);
   503	}
   504	EXPORT_SYMBOL(fb_prepare_logo);
   505	
 > 506	int fb_show_logo(struct fb_info *info, int rotate)
   507	{
   508		unsigned int count;
   509		int y;
   510	
   511		if (!fb_logo_count)
   512			return 0;
   513	
   514		count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
   515		y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
   516		y = fb_show_extra_logos(info, y, rotate);
   517	
   518		return y;
   519	}
   520	EXPORT_SYMBOL(fb_show_logo);
   521	#else
   522	int fb_prepare_logo(struct fb_info *info, int rotate)
   523	{
   524		return 0;
   525	}
   526	EXPORT_SYMBOL(fb_prepare_logo);
   527	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH 5/7] fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected

[Helge Deller]

On 8/29/23 16:15, Thomas Zimmermann wrote:
> Only build fb_logo.c if CONFIG_LOGO has been selected. Otherwise
> provide empty implementations of the contained interfaces and avoid
> using the exported variables.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
...
> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
> index f157a5a1dffc..24b038510a71 100644
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -474,15 +474,19 @@ static int __init fb_console_setup(char *this_opt)
>
>   		if (!strncmp(options, "logo-pos:", 9)) {
>   			options += 9;
> +#ifdef CONFIG_LOGO
>   			if (!strcmp(options, "center"))
>   				fb_center_logo = true;
> +#endif

IMHO, *sometimes* it makes sense to not use #ifdef and code it instead like this:
   			if (IS_ENABLED(CONFIG_LOGO) &&
			    !strcmp(options, "center"))
...
That way the compiler will optimize that code away as well, but in
addition it will compile-check that you have correct coding independend
if CONFIG_LOGO is set or not.

>   			continue;
>   		}
>
>   		if (!strncmp(options, "logo-count:", 11)) {
>   			options += 11;
> +#ifdef CONFIG_LOGO
>   			if (*options)
>   				fb_logo_count = simple_strtol(options, &options, 0);
> +#endif

same here.

Helge

Re: [PATCH 4/7] fbdev/core: Move logo functions into separate source file

[kernel test robot]

Hi Thomas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on linus/master next-20230831]
[cannot apply to v6.5]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Thomas-Zimmermann/fbdev-au1200fb-Do-not-display-boot-up-logo/20230829-222419
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230829142109.4521-5-tzimmermann%40suse.de
patch subject: [PATCH 4/7] fbdev/core: Move logo functions into separate source file
config: mips-rs90_defconfig (https://download.01.org/0day-ci/archive/20230902/202309020305.jCImaNGf-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230902/202309020305.jCImaNGf-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309020305.jCImaNGf-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/video/fbdev/core/fb_logo.c:433:5: warning: no previous prototype for function 'fb_prepare_logo' [-Wmissing-prototypes]
     433 | int fb_prepare_logo(struct fb_info *info, int rotate)
         |     ^
   drivers/video/fbdev/core/fb_logo.c:433:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     433 | int fb_prepare_logo(struct fb_info *info, int rotate)
         | ^
         | static 
>> drivers/video/fbdev/core/fb_logo.c:506:5: warning: no previous prototype for function 'fb_show_logo' [-Wmissing-prototypes]
     506 | int fb_show_logo(struct fb_info *info, int rotate)
         |     ^
   drivers/video/fbdev/core/fb_logo.c:506:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     506 | int fb_show_logo(struct fb_info *info, int rotate)
         | ^
         | static 
   2 warnings generated.


vim +/fb_prepare_logo +433 drivers/video/fbdev/core/fb_logo.c

   432	
 > 433	int fb_prepare_logo(struct fb_info *info, int rotate)
   434	{
   435		int depth = fb_get_color_depth(&info->var, &info->fix);
   436		unsigned int yres;
   437		int height;
   438	
   439		memset(&fb_logo, 0, sizeof(struct logo_data));
   440	
   441		if (info->flags & FBINFO_MISC_TILEBLITTING ||
   442		    info->fbops->owner || !fb_logo_count)
   443			return 0;
   444	
   445		if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
   446			depth = info->var.blue.length;
   447			if (info->var.red.length < depth)
   448				depth = info->var.red.length;
   449			if (info->var.green.length < depth)
   450				depth = info->var.green.length;
   451		}
   452	
   453		if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
   454			/* assume console colormap */
   455			depth = 4;
   456		}
   457	
   458		/* Return if no suitable logo was found */
   459		fb_logo.logo = fb_find_logo(depth);
   460	
   461		if (!fb_logo.logo)
   462			return 0;
   463	
   464		if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
   465			yres = info->var.yres;
   466		else
   467			yres = info->var.xres;
   468	
   469		if (fb_logo.logo->height > yres) {
   470			fb_logo.logo = NULL;
   471			return 0;
   472		}
   473	
   474		/* What depth we asked for might be different from what we get */
   475		if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
   476			fb_logo.depth = 8;
   477		else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
   478			fb_logo.depth = 4;
   479		else
   480			fb_logo.depth = 1;
   481	
   482	
   483		if (fb_logo.depth > 4 && depth > 4) {
   484			switch (info->fix.visual) {
   485			case FB_VISUAL_TRUECOLOR:
   486				fb_logo.needs_truepalette = 1;
   487				break;
   488			case FB_VISUAL_DIRECTCOLOR:
   489				fb_logo.needs_directpalette = 1;
   490				fb_logo.needs_cmapreset = 1;
   491				break;
   492			case FB_VISUAL_PSEUDOCOLOR:
   493				fb_logo.needs_cmapreset = 1;
   494				break;
   495			}
   496		}
   497	
   498		height = fb_logo.logo->height;
   499		if (fb_center_logo)
   500			height += (yres - fb_logo.logo->height) / 2;
   501	
   502		return fb_prepare_extra_logos(info, height, yres);
   503	}
   504	EXPORT_SYMBOL(fb_prepare_logo);
   505	
 > 506	int fb_show_logo(struct fb_info *info, int rotate)
   507	{
   508		unsigned int count;
   509		int y;
   510	
   511		if (!fb_logo_count)
   512			return 0;
   513	
   514		count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
   515		y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
   516		y = fb_show_extra_logos(info, y, rotate);
   517	
   518		return y;
   519	}
   520	EXPORT_SYMBOL(fb_show_logo);
   521	#else
   522	int fb_prepare_logo(struct fb_info *info, int rotate)
   523	{
   524		return 0;
   525	}
   526	EXPORT_SYMBOL(fb_prepare_logo);
   527	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH 4/7] fbdev/core: Move logo functions into separate source file

[kernel test robot]

Hi Thomas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on linus/master next-20230831]
[cannot apply to v6.5]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Thomas-Zimmermann/fbdev-au1200fb-Do-not-display-boot-up-logo/20230829-222419
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230829142109.4521-5-tzimmermann%40suse.de
patch subject: [PATCH 4/7] fbdev/core: Move logo functions into separate source file
config: x86_64-buildonly-randconfig-001-20230902 (https://download.01.org/0day-ci/archive/20230902/202309020442.Ef28qbgO-lkp@intel.com/config)
compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230902/202309020442.Ef28qbgO-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309020442.Ef28qbgO-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/video/fbdev/core/fb_logo.c:433:5: warning: no previous declaration for 'fb_prepare_logo' [-Wmissing-declarations]
    int fb_prepare_logo(struct fb_info *info, int rotate)
        ^~~~~~~~~~~~~~~
>> drivers/video/fbdev/core/fb_logo.c:506:5: warning: no previous declaration for 'fb_show_logo' [-Wmissing-declarations]
    int fb_show_logo(struct fb_info *info, int rotate)
        ^~~~~~~~~~~~


vim +/fb_prepare_logo +433 drivers/video/fbdev/core/fb_logo.c

   432	
 > 433	int fb_prepare_logo(struct fb_info *info, int rotate)
   434	{
   435		int depth = fb_get_color_depth(&info->var, &info->fix);
   436		unsigned int yres;
   437		int height;
   438	
   439		memset(&fb_logo, 0, sizeof(struct logo_data));
   440	
   441		if (info->flags & FBINFO_MISC_TILEBLITTING ||
   442		    info->fbops->owner || !fb_logo_count)
   443			return 0;
   444	
   445		if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
   446			depth = info->var.blue.length;
   447			if (info->var.red.length < depth)
   448				depth = info->var.red.length;
   449			if (info->var.green.length < depth)
   450				depth = info->var.green.length;
   451		}
   452	
   453		if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
   454			/* assume console colormap */
   455			depth = 4;
   456		}
   457	
   458		/* Return if no suitable logo was found */
   459		fb_logo.logo = fb_find_logo(depth);
   460	
   461		if (!fb_logo.logo)
   462			return 0;
   463	
   464		if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
   465			yres = info->var.yres;
   466		else
   467			yres = info->var.xres;
   468	
   469		if (fb_logo.logo->height > yres) {
   470			fb_logo.logo = NULL;
   471			return 0;
   472		}
   473	
   474		/* What depth we asked for might be different from what we get */
   475		if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
   476			fb_logo.depth = 8;
   477		else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
   478			fb_logo.depth = 4;
   479		else
   480			fb_logo.depth = 1;
   481	
   482	
   483		if (fb_logo.depth > 4 && depth > 4) {
   484			switch (info->fix.visual) {
   485			case FB_VISUAL_TRUECOLOR:
   486				fb_logo.needs_truepalette = 1;
   487				break;
   488			case FB_VISUAL_DIRECTCOLOR:
   489				fb_logo.needs_directpalette = 1;
   490				fb_logo.needs_cmapreset = 1;
   491				break;
   492			case FB_VISUAL_PSEUDOCOLOR:
   493				fb_logo.needs_cmapreset = 1;
   494				break;
   495			}
   496		}
   497	
   498		height = fb_logo.logo->height;
   499		if (fb_center_logo)
   500			height += (yres - fb_logo.logo->height) / 2;
   501	
   502		return fb_prepare_extra_logos(info, height, yres);
   503	}
   504	EXPORT_SYMBOL(fb_prepare_logo);
   505	
 > 506	int fb_show_logo(struct fb_info *info, int rotate)
   507	{
   508		unsigned int count;
   509		int y;
   510	
   511		if (!fb_logo_count)
   512			return 0;
   513	
   514		count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
   515		y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
   516		y = fb_show_extra_logos(info, y, rotate);
   517	
   518		return y;
   519	}
   520	EXPORT_SYMBOL(fb_show_logo);
   521	#else
   522	int fb_prepare_logo(struct fb_info *info, int rotate)
   523	{
   524		return 0;
   525	}
   526	EXPORT_SYMBOL(fb_prepare_logo);
   527	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH 5/7] fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 2037 bytes --]

Hi

Am 01.09.23 um 10:22 schrieb Helge Deller:
> On 8/29/23 16:15, Thomas Zimmermann wrote:
>> Only build fb_logo.c if CONFIG_LOGO has been selected. Otherwise
>> provide empty implementations of the contained interfaces and avoid
>> using the exported variables.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ...
>> diff --git a/drivers/video/fbdev/core/fbcon.c 
>> b/drivers/video/fbdev/core/fbcon.c
>> index f157a5a1dffc..24b038510a71 100644
>> --- a/drivers/video/fbdev/core/fbcon.c
>> +++ b/drivers/video/fbdev/core/fbcon.c
>> @@ -474,15 +474,19 @@ static int __init fb_console_setup(char *this_opt)
>>
>>           if (!strncmp(options, "logo-pos:", 9)) {
>>               options += 9;
>> +#ifdef CONFIG_LOGO
>>               if (!strcmp(options, "center"))
>>                   fb_center_logo = true;
>> +#endif
> 
> IMHO, *sometimes* it makes sense to not use #ifdef and code it instead 
> like this:
>                if (IS_ENABLED(CONFIG_LOGO) &&
>                  !strcmp(options, "center"))
> ...
> That way the compiler will optimize that code away as well, but in
> addition it will compile-check that you have correct coding independend
> if CONFIG_LOGO is set or not.

Good idea. I'll change it. The IS_ENABLED code is also easier to read IMHO.

Best regards
Thomas

> 
>>               continue;
>>           }
>>
>>           if (!strncmp(options, "logo-count:", 11)) {
>>               options += 11;
>> +#ifdef CONFIG_LOGO
>>               if (*options)
>>                   fb_logo_count = simple_strtol(options, &options, 0);
>> +#endif
> 
> same here.
> 
> Helge

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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Re: [PATCH 1/7] fbdev/au1200fb: Do not display boot-up logo

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> The fbcon module takes care of displaying the logo, if any. Remove
> the code form au1200fb. If we want to display the logo without fbcon,
> we should implement this in the fbdev core code.
>

Agreed. I see that this code has been since the driver was added in 2006,
I wonder if was ever used. Enabling a fbdev driver without fbcon doesn't
seem to be a common configuration.

> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 2/7] fbdev/mmp/mmpfb: Do not display boot-up logo

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> The fbcon module takes care of displaying the logo, if any. Remove
> the code form mmpfb. If we want to display the logo without fbcon,

s/form/from

> we should implement this in the fbdev core code.
>

The commit message says the same than patch #1 but the driver will behave
differently right? That is, won't only show the logo when fbcon is not
enabled but unconditionally? So the logo will be duplicated when fbcon is
enabled?

If I understood that correctly, probably you should mention that in the
commit message since removing the fb_show_logo() will make the driver to
behave correctly.

> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 3/7] fbdev/core: Fix style of code for boot-up logo

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> Fix a number of warnings from checkpatch.pl in this code before
> moving it into a separate file. This includes
>
>  * Prefer 'unsigned int' to bare use of 'unsigned'
>  * space required after that ',' (ctx:VxV)
>  * space prohibited after that open parenthesis '('
>  * suspect code indent for conditional statements (16, 32)
>  * braces {} are not necessary for single statement blocks
>
> No functional changes.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---

[...]

> -	static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
> +	static const unsigned char mask[] = {
> +		0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff
> +	};

I didn't know that checkpatch.pl complained about this.

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 4/7] fbdev/core: Move logo functions into separate source file

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> Move the fbdev function for displaying boot-up logos into their
> own file fb_logo.c. The file can later be build depending on the
> state of CONFIG_LOGO. No functional changes.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---
>  drivers/video/fbdev/core/Makefile      |   1 +
>  drivers/video/fbdev/core/fb_internal.h |   6 +
>  drivers/video/fbdev/core/fb_logo.c     | 533 +++++++++++++++++++++++++
>  drivers/video/fbdev/core/fbmem.c       | 524 ------------------------
>  include/linux/fb.h                     |   5 -
>  5 files changed, 540 insertions(+), 529 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..adce31155e92 100644
> --- a/drivers/video/fbdev/core/Makefile
> +++ b/drivers/video/fbdev/core/Makefile
> @@ -2,6 +2,7 @@
>  obj-$(CONFIG_FB_NOTIFY)           += fb_notify.o
>  obj-$(CONFIG_FB_CORE)             += fb.o
>  fb-y                              := fb_info.o \
> +                                     fb_logo.o \

Maybe instead of adding this unconditionally you could only add it when
CONFIG_LOGO is enabled ?

[...]

> diff --git a/drivers/video/fbdev/core/fb_logo.c b/drivers/video/fbdev/core/fb_logo.c
> new file mode 100644
> index 000000000000..76ba5a2bebae
> --- /dev/null
> +++ b/drivers/video/fbdev/core/fb_logo.c
> @@ -0,0 +1,533 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/export.h>
> +#include <linux/fb.h>
> +#include <linux/linux_logo.h>
> +
> +bool fb_center_logo __read_mostly;
> +int fb_logo_count __read_mostly = -1;
> +
> +#ifdef CONFIG_LOGO

[...]

> +#else
> +int fb_prepare_logo(struct fb_info *info, int rotate)
> +{
> +	return 0;
> +}
> +EXPORT_SYMBOL(fb_prepare_logo);
> +
> +int fb_show_logo(struct fb_info *info, int rotate)
> +{
> +	return 0;
> +}
> +EXPORT_SYMBOL(fb_show_logo);

I would move the CONFIG_LOGO #ifdefery to the header file and make these a
static inline function, instead of having the stubs here and exporting
symbols for functions that are a no-op.

I think that will also fix the issues that the robot complained about.

Other than that, the patch looks good to me.

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 5/7] fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> Only build fb_logo.c if CONFIG_LOGO has been selected. Otherwise
> provide empty implementations of the contained interfaces and avoid
> using the exported variables.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Ah! You are doing in this patch exactly what I mentioned in my previous
email :)

I would just squash this patch with #4, but up to you.

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 6/7] fbdev/core: Remove empty internal helpers from fb_logo.c

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> Remove the two empty helpers for the case the CONFIG_FB_LOGO_EXTRA
> has not been set. They are internal functions and only called once.
> Providing empty replacements seems like overkill. Instead protect
> the call sites with a test for CONFIG_FB_LOGO_EXTRA.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 7/7] fbdev/core: Clean up include statements in fbmem.c

[Javier Martinez Canillas]

Thomas Zimmermann <tzimmermann@suse.de> writes:

> Remove all unnecessary include statements from fbmem.c. Most of
> them were for functionality that has meanwhile been moved into
> other files.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---

Acked-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat

Re: [PATCH 2/7] fbdev/mmp/mmpfb: Do not display boot-up logo

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 1353 bytes --]

Hi Javier

Am 06.09.23 um 11:54 schrieb Javier Martinez Canillas:
> Thomas Zimmermann <tzimmermann@suse.de> writes:
> 
>> The fbcon module takes care of displaying the logo, if any. Remove
>> the code form mmpfb. If we want to display the logo without fbcon,
> 
> s/form/from
> 
>> we should implement this in the fbdev core code.
>>
> 
> The commit message says the same than patch #1 but the driver will behave
> differently right? That is, won't only show the logo when fbcon is not
> enabled but unconditionally? So the logo will be duplicated when fbcon is
> enabled?
> 
> If I understood that correctly, probably you should mention that in the
> commit message since removing the fb_show_logo() will make the driver to
> behave correctly.

TBH I don't understand what happens here if the console and the logo has 
been enabled at the same time. AFAIK fbcon respects display rotation, 
but this driver doesn't. So the logo shows up in the wrong place then?

> 
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
>> ---
> 
> Acked-by: Javier Martinez Canillas <javierm@redhat.com>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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Re: [PATCH 5/7] fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 2214 bytes --]


Am 04.09.23 um 09:08 schrieb Thomas Zimmermann:
> Hi
> 
> Am 01.09.23 um 10:22 schrieb Helge Deller:
>> On 8/29/23 16:15, Thomas Zimmermann wrote:
>>> Only build fb_logo.c if CONFIG_LOGO has been selected. Otherwise
>>> provide empty implementations of the contained interfaces and avoid
>>> using the exported variables.
>>>
>>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
>> ...
>>> diff --git a/drivers/video/fbdev/core/fbcon.c 
>>> b/drivers/video/fbdev/core/fbcon.c
>>> index f157a5a1dffc..24b038510a71 100644
>>> --- a/drivers/video/fbdev/core/fbcon.c
>>> +++ b/drivers/video/fbdev/core/fbcon.c
>>> @@ -474,15 +474,19 @@ static int __init fb_console_setup(char *this_opt)
>>>
>>>           if (!strncmp(options, "logo-pos:", 9)) {
>>>               options += 9;
>>> +#ifdef CONFIG_LOGO
>>>               if (!strcmp(options, "center"))
>>>                   fb_center_logo = true;
>>> +#endif
>>
>> IMHO, *sometimes* it makes sense to not use #ifdef and code it instead 
>> like this:
>>                if (IS_ENABLED(CONFIG_LOGO) &&
>>                  !strcmp(options, "center"))
>> ...
>> That way the compiler will optimize that code away as well, but in
>> addition it will compile-check that you have correct coding independend
>> if CONFIG_LOGO is set or not.
> 
> Good idea. I'll change it. The IS_ENABLED code is also easier to read IMHO.

I'll keep the current approach, but in a simplified form.

> 
> Best regards
> Thomas
> 
>>
>>>               continue;
>>>           }
>>>
>>>           if (!strncmp(options, "logo-count:", 11)) {
>>>               options += 11;
>>> +#ifdef CONFIG_LOGO
>>>               if (*options)
>>>                   fb_logo_count = simple_strtol(options, &options, 0);
>>> +#endif
>>
>> same here.
>>
>> Helge
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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Re: [PATCH 5/7] fbdev/core: Build fb_logo iff CONFIG_LOGO has been selected

[Thomas Zimmermann]

[-- Attachment #1.1: Type: text/plain, Size: 947 bytes --]



Am 06.09.23 um 12:12 schrieb Javier Martinez Canillas:
> Thomas Zimmermann <tzimmermann@suse.de> writes:
> 
>> Only build fb_logo.c if CONFIG_LOGO has been selected. Otherwise
>> provide empty implementations of the contained interfaces and avoid
>> using the exported variables.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> Ah! You are doing in this patch exactly what I mentioned in my previous
> email :)
> 
> I would just squash this patch with #4, but up to you.

I'll refactor these patches slightly: The unexporting of the helpers 
goes into a new patch and the rest of patches 4 and 5 will be squashed.

> 
> Acked-by: Javier Martinez Canillas <javierm@redhat.com>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)

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