diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 23 | ||||
| -rw-r--r-- | drivers/platform/x86/intel_ips.c | 36 | ||||
| -rw-r--r-- | drivers/platform/x86/intel_ips.h | 21 |
3 files changed, 77 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index e6800819bca8..cb900dc83d95 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -34,6 +34,7 @@ #include "i915_drm.h" #include "i915_drv.h" #include "i915_trace.h" +#include "../../../platform/x86/intel_ips.h" #include <linux/pci.h> #include <linux/vgaarb.h> #include <linux/acpi.h> @@ -1871,6 +1872,26 @@ out_unlock: EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable); /** + * Tells the intel_ips driver that the i915 driver is now loaded, if + * IPS got loaded first. + * + * This awkward dance is so that neither module has to depend on the + * other in order for IPS to do the appropriate communication of + * GPU turbo limits to i915. + */ +static void +ips_ping_for_i915_load(void) +{ + void (*link)(void); + + link = symbol_get(ips_link_to_i915_driver); + if (link) { + link(); + symbol_put(ips_link_to_i915_driver); + } +} + +/** * i915_driver_load - setup chip and create an initial config * @dev: DRM device * @flags: startup flags @@ -2075,6 +2096,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) dev_priv->mchdev_lock = &mchdev_lock; spin_unlock(&mchdev_lock); + ips_ping_for_i915_load(); + return 0; out_workqueue_free: diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c index c44a5e8b8b82..f0b3ad13c273 100644 --- a/drivers/platform/x86/intel_ips.c +++ b/drivers/platform/x86/intel_ips.c @@ -75,6 +75,7 @@ #include <drm/i915_drm.h> #include <asm/msr.h> #include <asm/processor.h> +#include "intel_ips.h" #define PCI_DEVICE_ID_INTEL_THERMAL_SENSOR 0x3b32 @@ -245,6 +246,7 @@ #define thm_writel(off, val) writel((val), ips->regmap + (off)) static const int IPS_ADJUST_PERIOD = 5000; /* ms */ +static bool late_i915_load = false; /* For initial average collection */ static const int IPS_SAMPLE_PERIOD = 200; /* ms */ @@ -339,6 +341,9 @@ struct ips_driver { u64 orig_turbo_ratios; }; +static bool +ips_gpu_turbo_enabled(struct ips_driver *ips); + /** * ips_cpu_busy - is CPU busy? * @ips: IPS driver struct @@ -517,7 +522,7 @@ static void ips_disable_cpu_turbo(struct ips_driver *ips) */ static bool ips_gpu_busy(struct ips_driver *ips) { - if (!ips->gpu_turbo_enabled) + if (!ips_gpu_turbo_enabled(ips)) return false; return ips->gpu_busy(); @@ -532,7 +537,7 @@ static bool ips_gpu_busy(struct ips_driver *ips) */ static void ips_gpu_raise(struct ips_driver *ips) { - if (!ips->gpu_turbo_enabled) + if (!ips_gpu_turbo_enabled(ips)) return; if (!ips->gpu_raise()) @@ -549,7 +554,7 @@ static void ips_gpu_raise(struct ips_driver *ips) */ static void ips_gpu_lower(struct ips_driver *ips) { - if (!ips->gpu_turbo_enabled) + if (!ips_gpu_turbo_enabled(ips)) return; if (!ips->gpu_lower()) @@ -1454,6 +1459,31 @@ out_err: return false; } +static bool +ips_gpu_turbo_enabled(struct ips_driver *ips) +{ + if (!ips->gpu_busy && late_i915_load) { + if (ips_get_i915_syms(ips)) { + dev_info(&ips->dev->dev, + "i915 driver attached, reenabling gpu turbo\n"); + ips->gpu_turbo_enabled = !(thm_readl(THM_HTS) & HTS_GTD_DIS); + } + } + + return ips->gpu_turbo_enabled; +} + +void +ips_link_to_i915_driver() +{ + /* We can't cleanly get at the various ips_driver structs from + * this caller (the i915 driver), so just set a flag saying + * that it's time to try getting the symbols again. + */ + late_i915_load = true; +} +EXPORT_SYMBOL_GPL(ips_link_to_i915_driver); + static DEFINE_PCI_DEVICE_TABLE(ips_id_table) = { { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_THERMAL_SENSOR), }, diff --git a/drivers/platform/x86/intel_ips.h b/drivers/platform/x86/intel_ips.h new file mode 100644 index 000000000000..73299beff5b3 --- /dev/null +++ b/drivers/platform/x86/intel_ips.h @@ -0,0 +1,21 @@ +/* + * Copyright (c) 2010 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + * The full GNU General Public License is included in this distribution in + * the file called "COPYING". + */ + +void ips_link_to_i915_driver(void); |