From 44e1e7baa3b90b725efe1635e48083c04acba782 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 18 May 2017 21:48:11 +0100 Subject: [PATCH] drm/i915: Reorder media/render reset on g4x MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Ville found a reference to WaMediaResetBeforeFullReset which we presume means that we should simply do the media reset first. References: https://bugs.freedesktop.org/show_bug.cgi?id=100942 Suggested-by: Ville Syrjälä Signed-off-by: Chris Wilson Cc: Ville Syrjälä Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/20170518204811.7408-2-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/intel_uncore.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index b27cc00ebf83..7922264e4fe1 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1468,16 +1468,9 @@ static int g4x_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask) struct pci_dev *pdev = dev_priv->drm.pdev; int ret; - pci_write_config_byte(pdev, I915_GDRST, - GRDOM_RENDER | GRDOM_RESET_ENABLE); - ret = wait_for(g4x_reset_complete(pdev), 500); - if (ret) { - DRM_DEBUG_DRIVER("Wait for render reset failed\n"); - goto out; - } - /* WaVcpClkGateDisableForMediaReset:ctg,elk */ - I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE); + I915_WRITE(VDECCLK_GATE_D, + I915_READ(VDECCLK_GATE_D) | VCP_UNIT_CLOCK_GATE_DISABLE); POSTING_READ(VDECCLK_GATE_D); pci_write_config_byte(pdev, I915_GDRST, @@ -1485,14 +1478,24 @@ static int g4x_do_reset(struct drm_i915_private *dev_priv, unsigned engine_mask) ret = wait_for(g4x_reset_complete(pdev), 500); if (ret) { DRM_DEBUG_DRIVER("Wait for media reset failed\n"); + goto out; } - /* WaVcpClkGateDisableForMediaReset:ctg,elk */ - I915_WRITE(VDECCLK_GATE_D, I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE); - POSTING_READ(VDECCLK_GATE_D); + pci_write_config_byte(pdev, I915_GDRST, + GRDOM_RENDER | GRDOM_RESET_ENABLE); + ret = wait_for(g4x_reset_complete(pdev), 500); + if (ret) { + DRM_DEBUG_DRIVER("Wait for render reset failed\n"); + goto out; + } out: pci_write_config_byte(pdev, I915_GDRST, 0); + + I915_WRITE(VDECCLK_GATE_D, + I915_READ(VDECCLK_GATE_D) & ~VCP_UNIT_CLOCK_GATE_DISABLE); + POSTING_READ(VDECCLK_GATE_D); + return ret; } -- GitLab