From d5553c0990c8b9cde6a9abb1f15acf8a11c5eef3 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 4 May 2017 12:55:08 +0100 Subject: [PATCH] drm/i915: Move the unclaimed mmio detection into the powerwell for KMS MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Replace the large comment about requiring the powerwell for intel_uncore_arm_unclaimed_mmio_detection() by moving the arming of the mmio error detection into the powerwell held for modesetting. Thereby also accomplishing the goal of only arming the mmio detection after a full modeset. Signed-off-by: Chris Wilson Cc: Mika Kuoppala Cc: Daniel Vetter Cc: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/20170504115508.13571-1-chris@chris-wilson.co.uk Reviewed-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_display.c | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2b75faf61a83..97dfce53df5b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -13121,8 +13121,16 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_commit_hw_done(state); - if (intel_state->modeset) + if (intel_state->modeset) { + /* As one of the primary mmio accessors, KMS has a high + * likelihood of triggering bugs in unclaimed access. After we + * finish modesetting, see if an error has been flagged, and if + * so enable debugging for the next modeset - and hope we catch + * the culprit. + */ + intel_uncore_arm_unclaimed_mmio_detection(dev_priv); intel_display_power_put(dev_priv, POWER_DOMAIN_MODESET); + } mutex_lock(&dev->struct_mutex); drm_atomic_helper_cleanup_planes(dev, state); @@ -13132,19 +13140,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_state_put(state); - /* As one of the primary mmio accessors, KMS has a high likelihood - * of triggering bugs in unclaimed access. After we finish - * modesetting, see if an error has been flagged, and if so - * enable debugging for the next modeset - and hope we catch - * the culprit. - * - * XXX note that we assume display power is on at this point. - * This might hold true now but we need to add pm helper to check - * unclaimed only when the hardware is on, as atomic commits - * can happen also when the device is completely off. - */ - intel_uncore_arm_unclaimed_mmio_detection(dev_priv); - intel_atomic_helper_free_state(dev_priv); } -- 2.20.1