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From: Ben Widawsky <ben@bwidawsk.net>
To: intel-gfx@lists.freedesktop.org
Cc: Ben Widawsky <ben@bwidawsk.net>
Subject: [PATCH 4/7] drm/i915: POSTING_READ the new rps value
Date: Fri,  7 Sep 2012 19:43:41 -0700	[thread overview]
Message-ID: <1347072225-10654-5-git-send-email-ben@bwidawsk.net> (raw)
In-Reply-To: <1347072225-10654-1-git-send-email-ben@bwidawsk.net>

In order to keep our cached values in sync with the hardware, we need a
posting read here.

CC: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/intel_pm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 36c6409..4e86037 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2338,6 +2338,8 @@ void gen6_set_rps(struct drm_device *dev, u8 val)
 	 */
 	I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, limits);
 
+	POSTING_READ(GEN6_RPNSWREQ);
+
 	dev_priv->rps.cur_delay = val;
 
 	trace_intel_gpu_freq_change(val * 50);
-- 
1.7.12

  parent reply	other threads:[~2012-09-08  2:44 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-08  2:43 [PATCH 0/8 v2] Moar sysfs stuff Ben Widawsky
2012-09-08  2:43 ` [REPOST PATCH 1/7] drm/i915: variable renames Ben Widawsky
2012-09-08  2:43 ` [REPOST PATCH 2/7] drm/i915: #define gpu freq multipler Ben Widawsky
2012-09-08  2:43 ` [REPOST PATCH 3/7 v2] drm/i915: Add current/max/min GPU freq to sysfs Ben Widawsky
2012-09-08  2:43 ` Ben Widawsky [this message]
2012-09-09 18:26   ` [PATCH 4/7] drm/i915: POSTING_READ the new rps value Chris Wilson
2012-09-08  2:43 ` [PATCH 5/7] drm/i915: Error checks in gen6_set_rps Ben Widawsky
2012-09-09 18:25   ` Chris Wilson
2012-09-12 21:37     ` Daniel Vetter
2012-09-08  2:43 ` [PATCH 6/7 v3] drm/i915: Add setters for min/max frequency Ben Widawsky
2012-09-12 14:46   ` Daniel Vetter
2012-09-13  1:12     ` [PATCH 6/7 v4] " Ben Widawsky
2012-09-08  2:43 ` [REPOST PATCH 7/7] drm/i915: Show render P state thresholds in sysfs Ben Widawsky
2012-09-14 16:51   ` Daniel Vetter
2012-09-08  2:43 ` [PATCH] sysfs rps test added Ben Widawsky
2012-09-14 18:32   ` Daniel Vetter

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