From: Mikulas Patocka Date: Thu, 23 Jan 2014 19:44:00 +0000 (-0500) Subject: tgafb: avoid restriction on modes with line length not a multiple of 64 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e62cabb5e9949bd51f68832b5ec9e18fcd323e20;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git tgafb: avoid restriction on modes with line length not a multiple of 64 In tgafb there is a restriction that prevents the user from setting a videomode with line length not a multiple of 64 bytes (for example, 800x600 is not allowed). The reason for this restriction it that functions copyarea_line_8bpp and copyarea_line_32bpp can not handle a line length that is not a multiple of 64 bytes. This patch removes this restriction on mode setting and makes sure that the functions copyarea_line_8bpp and copyarea_line_32bpp are called only if line length is a multiple of 64 bytes. If we set a mode 800x600, the functions copyarea_line_8bpp and copyarea_line_32bpp are not used, generic functions for copying are used instead and it works just fine. Signed-off-by: Mikulas Patocka Signed-off-by: Tomi Valkeinen --- diff --git a/drivers/video/tgafb.c b/drivers/video/tgafb.c index 3d5bce517d8e..65ba9921506e 100644 --- a/drivers/video/tgafb.c +++ b/drivers/video/tgafb.c @@ -192,8 +192,8 @@ tgafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) return -EINVAL; /* Some of the acceleration routines assume the line width is - a multiple of 64 bytes. */ - if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 64) + a multiple of 8 bytes. */ + if (var->xres * (par->tga_type == TGA_TYPE_8PLANE ? 1 : 4) % 8) return -EINVAL; return 0; @@ -1280,7 +1280,7 @@ tgafb_copyarea(struct fb_info *info, const struct fb_copyarea *area) bpp = info->var.bits_per_pixel; /* Detect copies of the entire line. */ - if (width * (bpp >> 3) == line_length) { + if (!(line_length & 63) && width * (bpp >> 3) == line_length) { if (bpp == 8) copyarea_line_8bpp(info, dy, sy, height, width); else