From bea4e4a4f831df1c104be60b3caa7205ba1bb4f9 Mon Sep 17 00:00:00 2001 From: Michal Wajdeczko Date: Fri, 7 Apr 2017 16:01:45 +0000 Subject: [PATCH] drm/i915/guc: Use wait_for_register_fw() while waiting for MMIO response Waiting for the response status in scratch register can be done using our generic function. Let's use it. v2: rebased Signed-off-by: Michal Wajdeczko Suggested-by: Tvrtko Ursulin Cc: Tvrtko Ursulin Cc: Joonas Lahtinen Cc: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/20170407160145.181328-2-michal.wajdeczko@intel.com Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/intel_uc.c | 26 +++++++------------------- 1 file changed, 7 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c index c117424f1f50..4364b1a9064e 100644 --- a/drivers/gpu/drm/i915/intel_uc.c +++ b/drivers/gpu/drm/i915/intel_uc.c @@ -360,19 +360,6 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv) } /* - * Read GuC command/status register (SOFT_SCRATCH_0) - * Return true if it contains a response rather than a command - */ -static bool guc_recv(struct intel_guc *guc, u32 *status) -{ - struct drm_i915_private *dev_priv = guc_to_i915(guc); - - u32 val = I915_READ(SOFT_SCRATCH(0)); - *status = val; - return INTEL_GUC_RECV_IS_RESPONSE(val); -} - -/* * This function implements the MMIO based host to GuC interface. */ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len) @@ -399,13 +386,14 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len) I915_WRITE(GUC_SEND_INTERRUPT, GUC_SEND_TRIGGER); /* - * Fast commands should complete in less than 10us, so sample quickly - * up to that length of time, then switch to a slower sleep-wait loop. - * No inte_guc_send command should ever take longer than 10ms. + * No GuC command should ever take longer than 10ms. + * Fast commands should still complete in 10us. */ - ret = wait_for_us(guc_recv(guc, &status), 10); - if (ret) - ret = wait_for(guc_recv(guc, &status), 10); + ret = __intel_wait_for_register_fw(dev_priv, + SOFT_SCRATCH(0), + INTEL_GUC_RECV_MASK, + INTEL_GUC_RECV_MASK, + 10, 10, &status); if (status != INTEL_GUC_STATUS_SUCCESS) { /* * Either the GuC explicitly returned an error (which -- 2.11.0