From 61da5fab5a9b129cf05b1fe4666c3e45b3103fd4 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:10:57 -0700 Subject: drm/i915/dp: retry link status read 3 times on failure Especially after a hotplug or power status change, the sink may not reply immediately to a link status query. So retry 3 times per the spec to really make sure nothing is there. See section 9.1 of the 1.1a DisplayPort spec. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 391b55f1cc74..86912bd737ad 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1019,14 +1019,20 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) static bool intel_dp_get_link_status(struct intel_dp *intel_dp) { - int ret; + int ret, i; + + /* Must try AUX reads for this at least 3 times */ + for (i = 0; i < 3; i++) { + ret = intel_dp_aux_native_read(intel_dp, + DP_LANE0_1_STATUS, + intel_dp->link_status, + DP_LINK_STATUS_SIZE); + if (ret == DP_LINK_STATUS_SIZE) + return true; + msleep(1); + } - ret = intel_dp_aux_native_read(intel_dp, - DP_LANE0_1_STATUS, - intel_dp->link_status, DP_LINK_STATUS_SIZE); - if (ret != DP_LINK_STATUS_SIZE) - return false; - return true; + return false; } static uint8_t -- cgit v1.2.2 From 7183dc2912510cf005fcc59239f8d153ef51d3f0 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:10:58 -0700 Subject: drm/i915/dp: use DP DPCD defines when looking at DPCD values Makes it easier to search for DP related constants. Reviewed-by: Keith Packard Signed-off-by: Jesse Barnes Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 86912bd737ad..fc51730b89d6 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -138,8 +138,8 @@ intel_dp_max_lane_count(struct intel_dp *intel_dp) { int max_lane_count = 4; - if (intel_dp->dpcd[0] >= 0x11) { - max_lane_count = intel_dp->dpcd[2] & 0x1f; + if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) { + max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f; switch (max_lane_count) { case 1: case 2: case 4: break; @@ -153,7 +153,7 @@ intel_dp_max_lane_count(struct intel_dp *intel_dp) static int intel_dp_max_link_bw(struct intel_dp *intel_dp) { - int max_link_bw = intel_dp->dpcd[1]; + int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; switch (max_link_bw) { case DP_LINK_BW_1_62: @@ -774,7 +774,8 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, /* * Check for DPCD version > 1.1 and enhanced framing support */ - if (intel_dp->dpcd[0] >= 0x11 && (intel_dp->dpcd[2] & DP_ENHANCED_FRAME_CAP)) { + if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && + (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; intel_dp->DP |= DP_ENHANCED_FRAMING; } @@ -1553,7 +1554,7 @@ ironlake_dp_detect(struct intel_dp *intel_dp) 0x000, intel_dp->dpcd, sizeof (intel_dp->dpcd)) == sizeof(intel_dp->dpcd)) { - if (intel_dp->dpcd[0] != 0) + if (intel_dp->dpcd[DP_DPCD_REV] != 0) status = connector_status_connected; } DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0], @@ -1592,7 +1593,7 @@ g4x_dp_detect(struct intel_dp *intel_dp) if (intel_dp_aux_native_read(intel_dp, 0x000, intel_dp->dpcd, sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd)) { - if (intel_dp->dpcd[0] != 0) + if (intel_dp->dpcd[DP_DPCD_REV] != 0) status = connector_status_connected; } @@ -1960,8 +1961,9 @@ intel_dp_init(struct drm_device *dev, int output_reg) sizeof(intel_dp->dpcd)); ironlake_edp_panel_vdd_off(intel_dp); if (ret == sizeof(intel_dp->dpcd)) { - if (intel_dp->dpcd[0] >= 0x11) - dev_priv->no_aux_handshake = intel_dp->dpcd[3] & + if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) + dev_priv->no_aux_handshake = + intel_dp->dpcd[DP_MAX_DOWNSPREAD] & DP_NO_AUX_HANDSHAKE_LINK_TRAINING; } else { /* if this fails, presume the device is a ghost */ -- cgit v1.2.2 From 59cd09e1aea3ac6eb15b45e5d2261a63ecb1799c Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:10:59 -0700 Subject: drm/i915/dp: read more receiver capability bits on hotplug When a hotplug event is received, we need to check the receiver cap bits in case they've changed (as they might with a hub or chain config). Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index fc51730b89d6..a9a5051419df 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1522,6 +1522,8 @@ intel_dp_link_down(struct intel_dp *intel_dp) static void intel_dp_check_link_status(struct intel_dp *intel_dp) { + int ret; + if (!intel_dp->base.base.crtc) return; @@ -1530,6 +1532,15 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) return; } + /* Try to read receiver status if the link appears to be up */ + ret = intel_dp_aux_native_read(intel_dp, + 0x000, intel_dp->dpcd, + sizeof (intel_dp->dpcd)); + if (ret != sizeof(intel_dp->dpcd)) { + intel_dp_link_down(intel_dp); + return; + } + if (!intel_channel_eq_ok(intel_dp)) { intel_dp_start_link_train(intel_dp); intel_dp_complete_link_train(intel_dp); -- cgit v1.2.2 From 899526d9a73fda47516cf11ccb3467ad6702f568 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:11:00 -0700 Subject: drm/i915/dp: try to read receiver capabilities 3 times when detecting If ->detect is called too soon after a hot plug event, the sink may not be ready yet. So try up to 3 times with 1ms sleeps in between tries to get the data (spec dictates that receivers must be ready to respond within 1ms and that sources should try 3 times). See section 9.1 of the 1.1a DisplayPort spec. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a9a5051419df..70075d9900da 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1551,6 +1551,7 @@ static enum drm_connector_status ironlake_dp_detect(struct intel_dp *intel_dp) { enum drm_connector_status status; + int ret, i; /* Can't disconnect eDP, but you can close the lid... */ if (is_edp(intel_dp)) { @@ -1561,12 +1562,16 @@ ironlake_dp_detect(struct intel_dp *intel_dp) } status = connector_status_disconnected; - if (intel_dp_aux_native_read(intel_dp, - 0x000, intel_dp->dpcd, - sizeof (intel_dp->dpcd)) - == sizeof(intel_dp->dpcd)) { - if (intel_dp->dpcd[DP_DPCD_REV] != 0) + for (i = 0; i < 3; i++) { + ret = intel_dp_aux_native_read(intel_dp, + 0x000, intel_dp->dpcd, + sizeof (intel_dp->dpcd)); + if (ret == sizeof(intel_dp->dpcd) && + intel_dp->dpcd[DP_DPCD_REV] != 0) { status = connector_status_connected; + break; + } + msleep(1); } DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]); -- cgit v1.2.2 From 885a50147f00a8a80108904bf58a18af357717f3 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:11:01 -0700 Subject: drm/i915/dp: remove DPMS mode tracking from DP We currently use this when a hot plug event is received, only checking the link status and re-training if we had previously configured a link. However if we want to preserve the DP configuration across both hot plug and DPMS events (which we do for userspace apps that don't respond to hot plug uevents), we need to unconditionally check the link and try to bring it up on hot plug. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 70075d9900da..5f97c1751ff0 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -50,7 +50,6 @@ struct intel_dp { bool has_audio; int force_audio; uint32_t color_range; - int dpms_mode; uint8_t link_bw; uint8_t lane_count; uint8_t dpcd[4]; @@ -1010,7 +1009,6 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) if (is_edp(intel_dp)) ironlake_edp_backlight_on(dev); } - intel_dp->dpms_mode = mode; } /* @@ -1813,8 +1811,7 @@ intel_dp_hot_plug(struct intel_encoder *intel_encoder) { struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); - if (intel_dp->dpms_mode == DRM_MODE_DPMS_ON) - intel_dp_check_link_status(intel_dp); + intel_dp_check_link_status(intel_dp); } /* Return which DP Port should be selected for Transcoder DP control */ @@ -1882,7 +1879,6 @@ intel_dp_init(struct drm_device *dev, int output_reg) return; intel_dp->output_reg = output_reg; - intel_dp->dpms_mode = -1; intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); if (!intel_connector) { -- cgit v1.2.2 From df0c237d124fb8d10b98f7b43d63d962eeed9355 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:11:02 -0700 Subject: drm/i915/dp: consolidate AUX retry code When checking link status during a hot plug event or detecting sink presence, we need to retry 3 times per the spec (section 9.1 of the 1.1a DisplayPort spec). Consolidate the retry code into a native_aux_read_retry function for use by get_link_status and _detect. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 51 ++++++++++++++++++++++++----------------- 1 file changed, 30 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 5f97c1751ff0..bca48b05520b 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1012,21 +1012,23 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) } /* - * Fetch AUX CH registers 0x202 - 0x207 which contain - * link status information + * Native read with retry for link status and receiver capability reads for + * cases where the sink may still be asleep. */ static bool -intel_dp_get_link_status(struct intel_dp *intel_dp) +intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, + uint8_t *recv, int recv_bytes) { int ret, i; - /* Must try AUX reads for this at least 3 times */ + /* + * Sinks are *supposed* to come up within 1ms from an off state, + * but we're also supposed to retry 3 times per the spec. + */ for (i = 0; i < 3; i++) { - ret = intel_dp_aux_native_read(intel_dp, - DP_LANE0_1_STATUS, - intel_dp->link_status, - DP_LINK_STATUS_SIZE); - if (ret == DP_LINK_STATUS_SIZE) + ret = intel_dp_aux_native_read(intel_dp, address, recv, + recv_bytes); + if (ret == recv_bytes) return true; msleep(1); } @@ -1034,6 +1036,19 @@ intel_dp_get_link_status(struct intel_dp *intel_dp) return false; } +/* + * Fetch AUX CH registers 0x202 - 0x207 which contain + * link status information + */ +static bool +intel_dp_get_link_status(struct intel_dp *intel_dp) +{ + return intel_dp_aux_native_read_retry(intel_dp, + DP_LANE0_1_STATUS, + intel_dp->link_status, + DP_LINK_STATUS_SIZE); +} + static uint8_t intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], int r) @@ -1549,7 +1564,7 @@ static enum drm_connector_status ironlake_dp_detect(struct intel_dp *intel_dp) { enum drm_connector_status status; - int ret, i; + bool ret; /* Can't disconnect eDP, but you can close the lid... */ if (is_edp(intel_dp)) { @@ -1560,17 +1575,11 @@ ironlake_dp_detect(struct intel_dp *intel_dp) } status = connector_status_disconnected; - for (i = 0; i < 3; i++) { - ret = intel_dp_aux_native_read(intel_dp, - 0x000, intel_dp->dpcd, - sizeof (intel_dp->dpcd)); - if (ret == sizeof(intel_dp->dpcd) && - intel_dp->dpcd[DP_DPCD_REV] != 0) { - status = connector_status_connected; - break; - } - msleep(1); - } + ret = intel_dp_aux_native_read_retry(intel_dp, + 0x000, intel_dp->dpcd, + sizeof (intel_dp->dpcd)); + if (ret && intel_dp->dpcd[DP_DPCD_REV] != 0) + status = connector_status_connected; DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], intel_dp->dpcd[3]); return status; -- cgit v1.2.2 From c7ad381078ee1b5ce2ab5274bd5f12fee6e1e59a Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 7 Jul 2011 11:11:03 -0700 Subject: drm/i915/dp: manage sink power state if possible On sinks with a DPCD rev of 1.1 or greater, we can send sink power management commands to address 0x600 per section 5.1.5 of the DisplayPort 1.1a spec. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_dp.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index bca48b05520b..e2aced6eec4c 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -942,11 +942,44 @@ static void ironlake_edp_pll_off(struct drm_encoder *encoder) udelay(200); } +/* If the sink supports it, try to set the power state appropriately */ +static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) +{ + int ret, i; + + /* Should have a valid DPCD by this point */ + if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) + return; + + if (mode != DRM_MODE_DPMS_ON) { + ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, + DP_SET_POWER_D3); + if (ret != 1) + DRM_DEBUG_DRIVER("failed to write sink power state\n"); + } else { + /* + * When turning on, we need to retry for 1ms to give the sink + * time to wake up. + */ + for (i = 0; i < 3; i++) { + ret = intel_dp_aux_native_write_1(intel_dp, + DP_SET_POWER, + DP_SET_POWER_D0); + if (ret == 1) + break; + msleep(1); + } + } +} + static void intel_dp_prepare(struct drm_encoder *encoder) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); struct drm_device *dev = encoder->dev; + /* Wake up the sink first */ + intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); + if (is_edp(intel_dp)) { ironlake_edp_backlight_off(dev); ironlake_edp_panel_off(dev); @@ -990,6 +1023,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) if (mode != DRM_MODE_DPMS_ON) { if (is_edp(intel_dp)) ironlake_edp_backlight_off(dev); + intel_dp_sink_dpms(intel_dp, mode); intel_dp_link_down(intel_dp); if (is_edp(intel_dp)) ironlake_edp_panel_off(dev); @@ -998,6 +1032,7 @@ intel_dp_dpms(struct drm_encoder *encoder, int mode) } else { if (is_edp(intel_dp)) ironlake_edp_panel_vdd_on(intel_dp); + intel_dp_sink_dpms(intel_dp, mode); if (!(dp_reg & DP_PORT_EN)) { intel_dp_start_link_train(intel_dp); if (is_edp(intel_dp)) { -- cgit v1.2.2 From 1083694ab052e5ba38a8f9a057c4745448977837 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Thu, 7 Jul 2011 15:33:26 -0700 Subject: drm/i915: Enable GPU reset on Ivybridge. According to the hardware documentation, GDRST is exactly the same as on Sandybridge. So simply enable the existing code. Signed-off-by: Kenneth Graunke Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/i915_drv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 013d304455b9..58222e86e291 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -577,6 +577,7 @@ int i915_reset(struct drm_device *dev, u8 flags) if (get_seconds() - dev_priv->last_gpu_reset < 5) { DRM_ERROR("GPU hanging too fast, declaring wedged!\n"); } else switch (INTEL_INFO(dev)->gen) { + case 7: case 6: ret = gen6_do_reset(dev, flags); /* If reset with a user forcewake, try to restore */ -- cgit v1.2.2 From a7b85d2aa63ed09cd5a4a640772b3272f5ac7caa Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sun, 10 Jul 2011 13:12:17 -0700 Subject: drm/i915: Clean up i915_driver_load failure path i915_driver_load adds a write-combining MTRR region for the GTT aperture to improve memory speeds through the aperture. If i915_driver_load fails after this, it would not have cleaned up the MTRR. This shouldn't cause any problems, except for consuming an MTRR register. Still, it's best to clean up completely in the failure path, which is easily done by calling mtrr_del if the mtrr was successfully allocated. i915_driver_load calls i915_gem_load which register i915_gem_inactive_shrink. If i915_driver_load fails after calling i915_gem_load, the shrinker will be left registered. When called, it will access freed memory and crash. The fix is to unregister the shrinker in the failure path using code duplicated from i915_driver_unload. i915_driver_load also has some incorrect gotos in the error cleanup paths: * After failing to initialize the GTT (which cannot happen, btw, intel_gtt_get returns a fixed (non-NULL) value), it tries to free the uninitialized WC IO mapping. Fixed this by changing the target from out_iomapfree to out_rmmap Signed-off-by: Keith Packard Tested-by: Lin Ming --- drivers/gpu/drm/i915/i915_dma.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index e1787022d6c8..296fbd66f0e1 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1943,7 +1943,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) if (!dev_priv->mm.gtt) { DRM_ERROR("Failed to initialize GTT\n"); ret = -ENODEV; - goto out_iomapfree; + goto out_rmmap; } agp_size = dev_priv->mm.gtt->gtt_mappable_entries << PAGE_SHIFT; @@ -1987,7 +1987,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) if (dev_priv->wq == NULL) { DRM_ERROR("Failed to create our workqueue.\n"); ret = -ENOMEM; - goto out_iomapfree; + goto out_mtrrfree; } /* enable GEM by default */ @@ -2074,13 +2074,21 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) return 0; out_gem_unload: + if (dev_priv->mm.inactive_shrinker.shrink) + unregister_shrinker(&dev_priv->mm.inactive_shrinker); + if (dev->pdev->msi_enabled) pci_disable_msi(dev->pdev); intel_teardown_gmbus(dev); intel_teardown_mchbar(dev); destroy_workqueue(dev_priv->wq); -out_iomapfree: +out_mtrrfree: + if (dev_priv->mm.gtt_mtrr >= 0) { + mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base, + dev->agp->agp_info.aper_size * 1024 * 1024); + dev_priv->mm.gtt_mtrr = -1; + } io_mapping_free(dev_priv->mm.gtt_mapping); out_rmmap: pci_iounmap(dev->pdev, dev_priv->regs); -- cgit v1.2.2 From 05bd42688dbc066d4e2689b6f73c0470601f788b Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Tue, 12 Jul 2011 08:49:31 -0700 Subject: Revert "drm/i915: enable rc6 by default" This reverts commit a51f7a66fb5e4af5ec4286baef940d06594b59d2. We still have a few Ironlake and Sandybridge machines which fail when RC6 is enabled. Better luck next release? Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/i915_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 58222e86e291..eb91e2dd7914 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -52,7 +52,7 @@ module_param_named(powersave, i915_powersave, int, 0600); unsigned int i915_semaphores = 0; module_param_named(semaphores, i915_semaphores, int, 0600); -unsigned int i915_enable_rc6 = 1; +unsigned int i915_enable_rc6 = 0; module_param_named(i915_enable_rc6, i915_enable_rc6, int, 0600); unsigned int i915_enable_fbc = 0; -- cgit v1.2.2 From a94919eaddaa3fede1df8563ce4d761a75374645 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 12 Jul 2011 18:03:29 +0100 Subject: drm/i915/ringbuffer: Idling requires waiting for the ring to be empty ...which is measured by the size and not the amount of space remaining. Waiting upon size-8, did one of two things. In the common case with more than 8 bytes available to write into the ring, it would return immediately. Otherwise, it would timeout given the impossible condition of waiting for more space than is available in the ring, leading to warnings such as: [drm:intel_cleanup_ring_buffer] *ERROR* failed to quiesce render ring whilst cleaning up: -16 Signed-off-by: Chris Wilson Reviewed-by: Eric Anholt Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/intel_ringbuffer.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index c0e0ee63fbf4..39ac2b634ae5 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -165,7 +165,7 @@ void intel_cleanup_ring_buffer(struct intel_ring_buffer *ring); int __must_check intel_wait_ring_buffer(struct intel_ring_buffer *ring, int n); static inline int intel_wait_ring_idle(struct intel_ring_buffer *ring) { - return intel_wait_ring_buffer(ring, ring->space - 8); + return intel_wait_ring_buffer(ring, ring->size - 8); } int __must_check intel_ring_begin(struct intel_ring_buffer *ring, int n); -- cgit v1.2.2