Attachment 159937 Details for Bug 193745 – Proposed fix for large frame buffers.

[patch] Proposed fix for large frame buffers.

efifb.diff (text/plain), 1.94 KB, created by Marcel Moolenaar on 2015-08-17 03:25:19 UTC

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Creator: Marcel Moolenaar

Created: 2015-08-17 03:25:19 UTC

Size: 1.94 KB

patch

obsolete

>Index: sys/amd64/amd64/pmap.c
>===================================================================
>--- sys/amd64/amd64/pmap.c	(revision 286835)
>+++ sys/amd64/amd64/pmap.c	(working copy)
>@@ -698,7 +698,7 @@
> 	 * the entire 512GB of KVA space which is an unnecessary tax on
> 	 * physical memory.
> 	 */
>-	pt_pages += 8;		/* 16MB additional slop for kernel modules */
>+	pt_pages += 32;		/* 64MB additional slop for kernel modules */
> #endif
> 	nkpt = pt_pages;
> }
>Index: sys/dev/vt/hw/fb/vt_fb.c
>===================================================================
>--- sys/dev/vt/hw/fb/vt_fb.c	(revision 286835)
>+++ sys/dev/vt/hw/fb/vt_fb.c	(working copy)
>@@ -294,6 +294,7 @@
> 			if (mask != NULL && (mask[byte] & bit) == 0)
> 				continue;
> 			o = (y + yi) * info->fb_stride + (x + xi) * bpp;
>+			o += vd->vd_transpose;
> 			cc = pattern[byte] & bit ? fgc : bgc;
> 
> 			switch(bpp) {
>@@ -411,11 +412,16 @@
> vt_fb_init(struct vt_device *vd)
> {
> 	struct fb_info *info;
>+	u_int margin;
> 	int err;
> 
> 	info = vd->vd_softc;
>-	vd->vd_height = info->fb_height;
>-	vd->vd_width = info->fb_width;
>+	vd->vd_height = MIN(VT_FB_DEFAULT_HEIGHT, info->fb_height);
>+	margin = (info->fb_height - vd->vd_height) >> 1;
>+	vd->vd_transpose = margin * info->fb_stride;
>+	vd->vd_width = MIN(VT_FB_DEFAULT_WIDTH, info->fb_width);
>+	margin = (info->fb_width - vd->vd_width) >> 1;
>+	vd->vd_transpose += margin * (info->fb_bpp / NBBY);
> 	vd->vd_video_dev = info->fb_video_dev;
> 
> 	if (info->fb_size == 0)
>Index: sys/dev/vt/vt.h
>===================================================================
>--- sys/dev/vt/vt.h	(revision 286835)
>+++ sys/dev/vt/vt.h	(working copy)
>@@ -140,6 +140,7 @@
> 	uint32_t		 vd_mstate;	/* (?) Mouse state. */
> 	vt_axis_t		 vd_width;	/* (?) Screen width. */
> 	vt_axis_t		 vd_height;	/* (?) Screen height. */
>+	size_t			 vd_transpose;
> 	struct mtx		 vd_lock;	/* Per-device lock. */
> 	struct cv		 vd_winswitch;	/* (d) Window switch notify. */
> 	struct callout		 vd_timer;	/* (d) Display timer. */

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Attachments on bug 193745: 147441 | 147874 | 147944 | 159892 | 159937