3.19-stable review patch. If anyone has any objections, please let me know.
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From: Imre Deak <imre.deak@xxxxxxxxx>
commit b5f1c97f944482e98e6e39208af356630389d1ea upstream.
Due this typo we don't save/restore the GFX_MAX_REQ_COUNT register across
suspend/resume, so fix this.
This was introduced in
commit ddeea5b0c36f3665446518c609be91f9336ef674
Author: Imre Deak <imre.deak@xxxxxxxxx>
Date: Mon May 5 15:19:56 2014 +0300
drm/i915: vlv: add runtime PM support
I noticed this only by reading the code. To my knowledge it shouldn't
cause any real problems at the moment, since the power well backing this
register remains on across a runtime s/r. This may change once
system-wide s0ix functionality is enabled in the kernel.
v2:
- resend after a missing git add -u :/
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he@xxxxxxxxx)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1040,7 +1040,7 @@ static void vlv_save_gunit_s0ix_state(st
s->lra_limits[i] = I915_READ(GEN7_LRA_LIMITS_BASE + i * 4);
s->media_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
- s->gfx_max_req_count = I915_READ(GEN7_MEDIA_MAX_REQ_COUNT);
+ s->gfx_max_req_count = I915_READ(GEN7_GFX_MAX_REQ_COUNT);
s->render_hwsp = I915_READ(RENDER_HWS_PGA_GEN7);
s->ecochk = I915_READ(GAM_ECOCHK);
@@ -1122,7 +1122,7 @@ static void vlv_restore_gunit_s0ix_state
I915_WRITE(GEN7_LRA_LIMITS_BASE + i * 4, s->lra_limits[i]);
I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->media_max_req_count);
- I915_WRITE(GEN7_MEDIA_MAX_REQ_COUNT, s->gfx_max_req_count);
+ I915_WRITE(GEN7_GFX_MAX_REQ_COUNT, s->gfx_max_req_count);
I915_WRITE(RENDER_HWS_PGA_GEN7, s->render_hwsp);
I915_WRITE(GAM_ECOCHK, s->ecochk);
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