From 83e3337204b2385d20e149c8fe91bb2719978df2 Mon Sep 17 00:00:00 2001 From: Sagar Arun Kamble <sagar.a.kamble@intel.com> Date: Sun, 23 Aug 2015 17:52:47 +0530 Subject: [PATCH] drm/i915: Increase maximum polling time to 50ms for forcewake request/clear ack On BXT, We Observe timeout for forcewake request completion with 2ms polling period as given here: [drm:fw_domains_get] ERROR render: timed out waiting for forcewake ack request. Polling for 50ms is recommended to avoid these timeouts. Change-Id: Ie715b0069a3049606e9602bc5e97a6511890864d Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com> Reviewed by: Alex Dai <yu.dai@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> --- drivers/gpu/drm/i915/intel_uncore.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 440e2a5658afa..14d0831c6156c 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -27,7 +27,7 @@ #include <linux/pm_runtime.h> -#define FORCEWAKE_ACK_TIMEOUT_MS 2 +#define FORCEWAKE_ACK_TIMEOUT_MS 50 #define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__)) #define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__)) -- 2.30.2