Commit 3b9676e7 authored by Marcin Slusarz's avatar Marcin Slusarz Committed by Dave Airlie
Browse files

vga16fb, drm: vga16fb->drm handoff 



let vga16fb claim 0xA0000+0x10000 region as its aperture;
drm drivers don't use it, so we have to detect it and kick
vga16fb manually - but only if drm is driving the primary card

Signed-off-by: default avatarMarcin Slusarz <marcin.slusarz@gmail.com>
Cc: James Simmons <jsimmons@infradead.org>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 06415c56

drivers/gpu/drm/nouveau/nouveau_state.c

+6 −1
Original line number Diff line number Diff line
@@ -668,11 +668,16 @@ static struct apertures_struct *nouveau_get_apertures(struct drm_device *dev) 
static int nouveau_remove_conflicting_drivers(struct drm_device *dev)

{

	struct drm_nouveau_private *dev_priv = dev->dev_private;

	bool primary = false;

	dev_priv->apertures = nouveau_get_apertures(dev);

	if (!dev_priv->apertures)

		return -ENOMEM;



	remove_conflicting_framebuffers(dev_priv->apertures, "nouveaufb");

#ifdef CONFIG_X86

	primary = dev->pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;

#endif

	

	remove_conflicting_framebuffers(dev_priv->apertures, "nouveaufb", primary);

	return 0;

}

drivers/video/fbmem.c

+11 −3
Original line number Diff line number Diff line
@@ -1500,19 +1500,26 @@ static bool fb_do_apertures_overlap(struct apertures_struct *gena, 
	return false;

}



void remove_conflicting_framebuffers(struct apertures_struct *a, const char *name)

#define VGA_FB_PHYS 0xA0000

void remove_conflicting_framebuffers(struct apertures_struct *a,

				     const char *name, bool primary)

{

	int i;



	/* check all firmware fbs and kick off if the base addr overlaps */

	for (i = 0 ; i < FB_MAX; i++) {

		struct apertures_struct *gen_aper;

		if (!registered_fb[i])

			continue;



		if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))

			continue;



		if (fb_do_apertures_overlap(registered_fb[i]->apertures, a)) {

		gen_aper = registered_fb[i]->apertures;

		if (fb_do_apertures_overlap(gen_aper, a) ||

			(primary && gen_aper && gen_aper->count &&

			 gen_aper->ranges[0].base == VGA_FB_PHYS)) {



			printk(KERN_ERR "fb: conflicting fb hw usage "

			       "%s vs %s - removing generic driver\n",

			       name, registered_fb[i]->fix.id);
@@ -1545,7 +1552,8 @@ register_framebuffer(struct fb_info *fb_info) 
	if (fb_check_foreignness(fb_info))

		return -ENOSYS;



	remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id);

	remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id,

					 fb_is_primary_device(fb_info));



	num_registered_fb++;

	for (i = 0 ; i < FB_MAX; i++)

drivers/video/vga16fb.c

+19 −7
Original line number Diff line number Diff line
@@ -1263,10 +1263,19 @@ static void vga16fb_imageblit(struct fb_info *info, const struct fb_image *image 
		vga_imageblit_color(info, image);

}



static void vga16fb_destroy(struct fb_info *info)

{

	iounmap(info->screen_base);

	fb_dealloc_cmap(&info->cmap);

	/* XXX unshare VGA regions */

	framebuffer_release(info);

}



static struct fb_ops vga16fb_ops = {

	.owner		= THIS_MODULE,

	.fb_open        = vga16fb_open,

	.fb_release     = vga16fb_release,

	.fb_destroy	= vga16fb_destroy,

	.fb_check_var	= vga16fb_check_var,

	.fb_set_par	= vga16fb_set_par,

	.fb_setcolreg 	= vga16fb_setcolreg,
@@ -1306,6 +1315,11 @@ static int __devinit vga16fb_probe(struct platform_device *dev) 
		ret = -ENOMEM;

		goto err_fb_alloc;

	}

	info->apertures = alloc_apertures(1);

	if (!info->apertures) {

		ret = -ENOMEM;

		goto err_ioremap;

	}



	/* XXX share VGA_FB_PHYS and I/O region with vgacon and others */

	info->screen_base = (void __iomem *)VGA_MAP_MEM(VGA_FB_PHYS, 0);
@@ -1335,7 +1349,7 @@ static int __devinit vga16fb_probe(struct platform_device *dev) 
	info->fix = vga16fb_fix;

	/* supports rectangles with widths of multiples of 8 */

	info->pixmap.blit_x = 1 << 7 | 1 << 15 | 1 << 23 | 1 << 31;

	info->flags = FBINFO_FLAG_DEFAULT |

	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE |

		FBINFO_HWACCEL_YPAN;



	i = (info->var.bits_per_pixel == 8) ? 256 : 16;
@@ -1354,6 +1368,9 @@ static int __devinit vga16fb_probe(struct platform_device *dev) 


	vga16fb_update_fix(info);



	info->apertures->ranges[0].base = VGA_FB_PHYS;

	info->apertures->ranges[0].size = VGA_FB_PHYS_LEN;



	if (register_framebuffer(info) < 0) {

		printk(KERN_ERR "vga16fb: unable to register framebuffer\n");

		ret = -EINVAL;
@@ -1380,13 +1397,8 @@ static int vga16fb_remove(struct platform_device *dev) 
{

	struct fb_info *info = platform_get_drvdata(dev);



	if (info) {

	if (info)

		unregister_framebuffer(info);

		iounmap(info->screen_base);

		fb_dealloc_cmap(&info->cmap);

	/* XXX unshare VGA regions */

		framebuffer_release(info);

	}



	return 0;

}

include/linux/fb.h

+2 −1
Original line number Diff line number Diff line
@@ -971,7 +971,8 @@ 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 int unregister_framebuffer(struct fb_info *fb_info);

extern void remove_conflicting_framebuffers(struct apertures_struct *a, const char *name);

extern void remove_conflicting_framebuffers(struct apertures_struct *a,

				const char *name, bool primary);

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);

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