Attachment 128644 Details for Bug 93782 – Patch to get rid of vblank warnings

[patch] Patch to get rid of vblank warnings

0001-drm-i915-Disable-SVIDEO-for-Intel-965GME-GLE-Chipset.patch (text/plain), 2.85 KB, created by andram on 2016-12-23 01:42:53 UTC

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Creator: andram

Created: 2016-12-23 01:42:53 UTC

Size: 2.85 KB

patch

obsolete

>From 3e3a27513da9c218f713baa66b2375b382564430 Mon Sep 17 00:00:00 2001
>From: Andreas Amann <andreas.amann@web.de>
>Date: Fri, 23 Dec 2016 01:23:58 +0000
>Subject: [PATCH] drm/i915: Disable SVIDEO for Intel 965GME/GLE Chipset
>
>The SVIDEO load detection for this chipset broke sometimes during the
>refactoring of intel_get_load_detect_pipe() around 4.3 or 4.4. This
>resulted in typical backtraces of the form:
>
>WARNING: CPU: 0 PID: 102 at drivers/gpu/drm/drm_irq.c:1252
>drm_wait_one_vblank+0x1aa/0x1b0 [drm]
>vblank wait timed out on crtc 0
>Modules linked in: i915 i2c_algo_bit drm_kms_helper ata_generic
>serio_raw drm pata_acpi b44 mii ssb mmc_core video
>CPU: 0 PID: 102 Comm: kworker/u4:4 Not tainted 4.9.0-dirty #2
>Hardware name: Dell Inc. Vostro 1500                     /0NX907, BIOS
>A06 04/21/2008
>Workqueue: events_unbound async_run_entry_fn
> ffffa117009eb9d0 ffffffff9f3e565d ffffa117009eba20 0000000000000000
> ffffa117009eba10 ffffffff9f0a1ddb 000004e4cd6bb800 ffff8e31cb610000
> 0000000000000000 0000000000000000 0000000001000001 ffff8e31cef0ac08
>Call Trace:
> [<ffffffff9f3e565d>] dump_stack+0x63/0x86
> [<ffffffff9f0a1ddb>] __warn+0xcb/0xf0
> [<ffffffff9f0a1e5f>] warn_slowpath_fmt+0x5f/0x80
> [<ffffffff9f0e5b14>] ? finish_wait+0x54/0x70
> [<ffffffffc0257a6a>] drm_wait_one_vblank+0x1aa/0x1b0 [drm]
> [<ffffffff9f0e5d30>] ? prepare_to_wait_event+0x100/0x100
> [<ffffffffc038e64b>] intel_get_load_detect_pipe+0x5fb/0x610 [i915]
> [<ffffffffc03cae55>] intel_tv_detect+0x155/0x550 [i915]
> [<ffffffff9f0fbcbf>] ? vprintk_emit+0x30f/0x4b0
> [<ffffffffc02d915f>] drm_helper_probe_single_connector_modes+0x3ff/0x4f0 [drm_kms_helper]
> [<ffffffffc02e78fe>] drm_fb_helper_initial_config+0xae/0x420 [drm_kms_helper]
> [<ffffffff9f025728>] ? __switch_to+0x2a8/0x5c0
> [<ffffffffc03a4af8>] intel_fbdev_initial_config+0x18/0x30 [i915]
> [<ffffffff9f0c4f49>] async_run_entry_fn+0x39/0x140
> [<ffffffff9f0bbe24>] process_one_work+0x184/0x430
> [<ffffffff9f0bc11e>] worker_thread+0x4e/0x490
> [<ffffffff9f0bc0d0>] ? process_one_work+0x430/0x430
> [<ffffffff9f0c1b29>] kthread+0xd9/0xf0
> [<ffffffff9f0c1a50>] ? kthread_park+0x60/0x60
> [<ffffffff9f80ca95>] ret_from_fork+0x25/0x30
>
>as documented in https://bugs.freedesktop.org/show_bug.cgi?id=93782
>
>A fix of this regression seemed to be impossible.  As a resolution to
>this problem, let us thus disable SVIDEO output for this chip, which at
>least makes the hardware functional again.
>---
> drivers/gpu/drm/i915/i915_pci.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
>index fce8e19..a3de4e9 100644
>--- a/drivers/gpu/drm/i915/i915_pci.c
>+++ b/drivers/gpu/drm/i915/i915_pci.c
>@@ -143,7 +143,7 @@ static const struct intel_device_info intel_i965gm_info = {
> 	.is_crestline = 1,
> 	.is_mobile = 1, .has_fbc = 1,
> 	.has_overlay = 1,
>-	.supports_tv = 1,
>+	.supports_tv = 0,
> 	.hws_needs_physical = 1,
> };
> 
>-- 
>2.10.2
>

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Attachments on bug 93782: 121476 | 123855 | 123856 | 123865 | 123928 | 123929 | 128625 | 128639 | 128644 | 142084

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