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Date: Sun, 23 Nov 2008 10:15:58 +1100
From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
To: "Rafael J. Wysocki" <rjw@...k.pl>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Kernel Testers List <kernel-testers@...r.kernel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
"David S. Miller" <davem@...emloft.net>,
James Cloos <cloos@...loos.com>,
Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [Bug #11875] radeonfb lockup in .28-rc (bisected)
On Sat, 2008-11-22 at 21:28 +0100, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of recent regressions.
>
> The following bug entry is on the current list of known regressions
> from 2.6.27. Please verify if it still should be listed and let me know
> (either way).
The patch should definitely be merged as it fixes a problem. Andrew,
will you send it to Linus ? There's no fbdev maintainer anymore...
Here's the up to date patch (same as previously posted minus a warning
that was due to a now unused variable that I removed in this one). It
doesn't fix -other- problems reported with suspend & shutdown that have
been elusive so far (I really haven't reproduced despite some serious
torturing) and could be X bugs in the first place. I'll continue
investigating them but in the meantime, this should go in.
radeonfb: Fix problem with color expansion & alignment
The engine on some radeon variants locks up if color expansion is
called for non aligned source data. This patch enables a feature of
the core fbdev to request aligned input pixmaps and uses the HW
clipping engine to clip the output to the requested size
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---
Index: linux-work/drivers/video/aty/radeon_accel.c
===================================================================
--- linux-work.orig/drivers/video/aty/radeon_accel.c 2008-11-23 10:10:16.000000000 +1100
+++ linux-work/drivers/video/aty/radeon_accel.c 2008-11-23 10:12:34.000000000 +1100
@@ -174,12 +174,12 @@ static void radeonfb_prim_imageblit(stru
const struct fb_image *image,
u32 fg, u32 bg)
{
- unsigned int src_bytes, dwords;
+ unsigned int dwords;
u32 *bits;
radeonfb_set_creg(rinfo, DP_GUI_MASTER_CNTL, &rinfo->dp_gui_mc_cache,
rinfo->dp_gui_mc_base |
- GMC_BRUSH_NONE |
+ GMC_BRUSH_NONE | GMC_DST_CLIP_LEAVE |
GMC_SRC_DATATYPE_MONO_FG_BG |
ROP3_S |
GMC_BYTE_ORDER_MSB_TO_LSB |
@@ -189,9 +189,6 @@ static void radeonfb_prim_imageblit(stru
radeonfb_set_creg(rinfo, DP_SRC_FRGD_CLR, &rinfo->dp_src_fg_cache, fg);
radeonfb_set_creg(rinfo, DP_SRC_BKGD_CLR, &rinfo->dp_src_bg_cache, bg);
- radeon_fifo_wait(rinfo, 1);
- OUTREG(DST_Y_X, (image->dy << 16) | image->dx);
-
/* Ensure the dst cache is flushed and the engine idle before
* issuing the operation.
*
@@ -205,13 +202,19 @@ static void radeonfb_prim_imageblit(stru
/* X here pads width to a multiple of 32 and uses the clipper to
* adjust the result. Is that really necessary ? Things seem to
- * work ok for me without that and the doco doesn't seem to imply
+ * work ok for me without that and the doco doesn't seem to imply]
* there is such a restriction.
*/
- OUTREG(DST_WIDTH_HEIGHT, (image->width << 16) | image->height);
+ radeon_fifo_wait(rinfo, 4);
+ OUTREG(SC_TOP_LEFT, (image->dy << 16) | image->dx);
+ OUTREG(SC_BOTTOM_RIGHT, ((image->dy + image->height) << 16) |
+ (image->dx + image->width));
+ OUTREG(DST_Y_X, (image->dy << 16) | image->dx);
+
+ OUTREG(DST_HEIGHT_WIDTH, (image->height << 16) | ((image->width + 31) & ~31));
- src_bytes = (((image->width * image->depth) + 7) / 8) * image->height;
- dwords = (src_bytes + 3) / 4;
+ dwords = (image->width + 31) >> 5;
+ dwords *= image->height;
bits = (u32*)(image->data);
while(dwords >= 8) {
Index: linux-work/drivers/video/aty/radeon_base.c
===================================================================
--- linux-work.orig/drivers/video/aty/radeon_base.c 2008-11-23 10:10:16.000000000 +1100
+++ linux-work/drivers/video/aty/radeon_base.c 2008-11-23 10:11:02.000000000 +1100
@@ -1875,6 +1875,7 @@ static int __devinit radeon_set_fbinfo (
info->fbops = &radeonfb_ops;
info->screen_base = rinfo->fb_base;
info->screen_size = rinfo->mapped_vram;
+
/* Fill fix common fields */
strlcpy(info->fix.id, rinfo->name, sizeof(info->fix.id));
info->fix.smem_start = rinfo->fb_base_phys;
@@ -1889,8 +1890,25 @@ static int __devinit radeon_set_fbinfo (
info->fix.mmio_len = RADEON_REGSIZE;
info->fix.accel = FB_ACCEL_ATI_RADEON;
+ /* Allocate colormap */
fb_alloc_cmap(&info->cmap, 256, 0);
+ /* Setup pixmap used for acceleration */
+#define PIXMAP_SIZE (2048 * 4)
+
+ info->pixmap.addr = kmalloc(PIXMAP_SIZE, GFP_KERNEL);
+ if (!info->pixmap.addr) {
+ printk(KERN_ERR "radeonfb: Failed to allocate pixmap !\n");
+ noaccel = 1;
+ goto bail;
+ }
+ info->pixmap.size = PIXMAP_SIZE;
+ info->pixmap.flags = FB_PIXMAP_SYSTEM;
+ info->pixmap.scan_align = 4;
+ info->pixmap.buf_align = 4;
+ info->pixmap.access_align = 32;
+
+bail:
if (noaccel)
info->flags |= FBINFO_HWACCEL_DISABLED;
--
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