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Message-ID: <alpine.LNX.2.00.1402071052470.24838@pobox.suse.cz> Date: Fri, 7 Feb 2014 11:08:22 +0100 (CET) From: Jiri Kosina <jkosina@...e.cz> To: Dave Airlie <airlied@...ux.ie>, Daniel Vetter <daniel.vetter@...ll.ch>, Linus Torvalds <torvalds@...ux-foundation.org> cc: DRI mailing list <dri-devel@...ts.freedesktop.org>, linux-kernel@...r.kernel.org, Jani Nikula <jani.nikula@...el.com> Subject: Re: [git pull] drm next tree On Thu, 30 Jan 2014, Jiri Kosina wrote: > > git://people.freedesktop.org/~airlied/linux drm-next > [ ... snip ... ] > > Daniel Vetter (59): > [ ... snip ... ] > > drm/i915: dp aux irq support for g4x/vlv > > This commit causes all kinds of havoc on my ThinkPad x200s. It results in [ ... snip ... ] Not having received any response, I suggest the following for 3.14 From: Jiri Kosina <jkosina@...e.cz> Subject: [PATCH] Revert "drm/i915: dp aux irq support for g4x/vlv" This reverts commit 4aeebd7443e36b0a40032e518a9338f48bd27efc. Conflicts: drivers/gpu/drm/i915/i915_reg.h This commit causes all kinds of havoc on my ThinkPad x200s. It results in irq 16: nobody cared (try booting with the "irqpoll" option) CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.12.0-00854-g4aeebd7 #1 Hardware name: LENOVO 7470BN2/7470BN2, BIOS 6DET38WW (2.02 ) 12/19/2008 ffff8800795186c0 ffff88007c203e08 ffffffff81582503 ffff88007c203e38 ffffffff810a6a98 ffff88007c203e88 ffff880079518600 0000000000000000 0000000000000010 ffff88007c203e78 ffffffff810a6d43 00000010ffc4af9d Call Trace: <IRQ> [<ffffffff81582503>] dump_stack+0x7a/0x97 [<ffffffff810a6a98>] __report_bad_irq+0x38/0xf0 [<ffffffff810a6d43>] note_interrupt+0x1f3/0x240 [<ffffffff810a42d2>] handle_irq_event_percpu+0x142/0x220 [<ffffffff810a43f9>] handle_irq_event+0x49/0x70 [<ffffffff810a7561>] handle_fasteoi_irq+0x61/0x100 [<ffffffff81004a89>] handle_irq+0x59/0x150 [<ffffffff81052b6e>] ? _local_bh_enable+0xe/0x10 [<ffffffff81052bf1>] ? irq_enter+0x81/0x90 [<ffffffff8100403b>] do_IRQ+0x5b/0xe0 [<ffffffff81588aaf>] common_interrupt+0x6f/0x6f <EOI> [<ffffffff81588b5c>] ? retint_restore_args+0xe/0xe [<ffffffff8146c767>] ? poll_idle+0x47/0x90 [<ffffffff8146c740>] ? poll_idle+0x20/0x90 [<ffffffff810acd96>] ? ktime_get+0x56/0xd0 [<ffffffff8146c7f0>] cpuidle_enter_state+0x40/0xd0 [<ffffffff8146cc0a>] cpuidle_idle_call+0x10a/0x160 [<ffffffff8100b7b9>] arch_cpu_idle+0x9/0x30 [<ffffffff810a370b>] cpu_idle_loop+0x8b/0x270 [<ffffffff810a390e>] cpu_startup_entry+0x1e/0x20 [<ffffffff8157a0c3>] rest_init+0xd3/0xe0 [<ffffffff81579ff0>] ? csum_partial_copy_generic+0x170/0x170 [<ffffffff81ad905c>] start_kernel+0x3b3/0x461 [<ffffffff81ad8a96>] ? repair_env_string+0x58/0x58 [<ffffffff81ad84d1>] x86_64_start_reservations+0x1b/0x32 [<ffffffff81ad8622>] x86_64_start_kernel+0x13a/0x141 handlers: [<ffffffffa00acbc0>] usb_hcd_irq [usbcore] Disabling IRQ #16 and things go south afterwards (the machine hangs randomly, I/O is horribly slow, etc). Signed-off-by: Jiri Kosina <jkosina@...e.cz> --- drivers/gpu/drm/i915/i915_irq.c | 7 ------- drivers/gpu/drm/i915/i915_reg.h | 5 ----- drivers/gpu/drm/i915/intel_dp.c | 2 +- 3 files changed, 1 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 17d8fcb..b7fae5b 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1480,9 +1480,6 @@ static irqreturn_t valleyview_irq_handler(int irq, void *arg) intel_hpd_irq_handler(dev, hotplug_trigger, hpd_status_i915); - if (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X) - dp_aux_irq_handler(dev); - I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); I915_READ(PORT_HOTPLUG_STAT); } @@ -3670,10 +3667,6 @@ static irqreturn_t i965_irq_handler(int irq, void *arg) intel_hpd_irq_handler(dev, hotplug_trigger, IS_G4X(dev) ? hpd_status_g4x : hpd_status_i915); - if (IS_G4X(dev) && - (hotplug_status & DP_AUX_CHANNEL_MASK_INT_STATUS_G4X)) - dp_aux_irq_handler(dev); - I915_WRITE(PORT_HOTPLUG_STAT, hotplug_status); I915_READ(PORT_HOTPLUG_STAT); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a48b7ca..94b4cd5 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2139,11 +2139,6 @@ #define CRT_HOTPLUG_MONITOR_COLOR (3 << 8) #define CRT_HOTPLUG_MONITOR_MONO (2 << 8) #define CRT_HOTPLUG_MONITOR_NONE (0 << 8) -#define DP_AUX_CHANNEL_D_INT_STATUS_G4X (1 << 6) -#define DP_AUX_CHANNEL_C_INT_STATUS_G4X (1 << 5) -#define DP_AUX_CHANNEL_B_INT_STATUS_G4X (1 << 4) -#define DP_AUX_CHANNEL_MASK_INT_STATUS_G4X (7 << 4) - /* SDVO is different across gen3/4 */ #define SDVOC_HOTPLUG_INT_STATUS_G4X (1 << 3) #define SDVOB_HOTPLUG_INT_STATUS_G4X (1 << 2) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 5ede4e8..464c047 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -404,7 +404,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, int i, ret, recv_bytes; uint32_t status; int try, precharge, clock = 0; - bool has_aux_irq = true; + bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev); uint32_t timeout; /* dp aux is extremely sensitive to irq latency, hence request the -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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