Attachment 139498 Details for Bug 104388 – workaround

[patch] workaround

0001-i965-Disable-guardband-clipping-on-SandyBridge-for-o.patch (text/plain), 1.31 KB, created by vadym on 2018-05-11 12:31:50 UTC

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Creator: vadym

Created: 2018-05-11 12:31:50 UTC

Size: 1.31 KB

patch

obsolete

>From ff607bc202273678eb318348a8fe157bd65c4997 Mon Sep 17 00:00:00 2001
>From: Andriy Khulap <andriy.khulap@globallogic.com>
>Date: Fri, 20 Apr 2018 10:20:29 +0300
>Subject: [PATCH] i965: Disable guardband clipping on SandyBridge for odd
> dimensions
>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104388
>Signed-off-by: Andriy Khulap <andriy.khulap@globallogic.com>
>---
> src/mesa/drivers/dri/i965/genX_state_upload.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
>diff --git a/src/mesa/drivers/dri/i965/genX_state_upload.c b/src/mesa/drivers/dri/i965/genX_state_upload.c
>index a69a496..e4a2fb1 100644
>--- a/src/mesa/drivers/dri/i965/genX_state_upload.c
>+++ b/src/mesa/drivers/dri/i965/genX_state_upload.c
>@@ -2412,6 +2412,17 @@ brw_calculate_guardband_size(uint32_t fb_width, uint32_t fb_height,
>     */
>    const float gb_size = GEN_GEN >= 7 ? 16384.0f : 8192.0f;
> 
>+   /* Workaround: prevent gpu hangs on SandyBridge
>+    * by disabling guardband clipping for odd dimensions.
>+    */
>+   if (GEN_GEN == 6 && (fb_width & 1 || fb_height & 1)) {
>+      *xmin = -1.0f;
>+      *xmax =  1.0f;
>+      *ymin = -1.0f;
>+      *ymax =  1.0f;
>+      return;
>+   }
>+
>    if (m00 != 0 && m11 != 0) {
>       /* First, we compute the screen-space render area */
>       const float ss_ra_xmin = MIN3(        0, m30 + m00, m30 - m00);
>-- 
>2.7.4
>

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Attachments on bug 104388: 136392 | 136393 | 139498

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