diff options
| author | Eric Anholt <eric@anholt.net> | 2010-12-20 18:40:06 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-01-07 13:58:45 -0800 |
| commit | b16e490eb5f7fb19f1e8fd07f6d45d771a487f82 (patch) | |
| tree | 9d1b83eb9e36f4813b5de521d1545c12a81ba992 /drivers/gpu | |
| parent | 0f37a87fae33bbca1e2ff289330c2f4ba93b5064 (diff) | |
drm/i915, intel_ips: When i915 loads after IPS, make IPS relink to i915.
commit 63ee41d794d9c555f84205517a68509848988760 upstream.
The IPS driver is designed to be able to run detached from i915 and
just not enable GPU turbo in that case, in order to avoid module
dependencies between the two drivers. This means that we don't know
what the load order between the two is going to be, and we had
previously only supported IPS after (optionally) i915, but not i915
after IPS. If the wrong order was chosen, you'd get no GPU turbo, and
something like half the possible graphics performance.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 71c69b8e2ed0..c836b886b357 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> @@ -2047,6 +2048,26 @@ 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 @@ -2234,6 +2255,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) /* XXX Prevent module unload due to memory corruption bugs. */ __module_get(THIS_MODULE); + ips_ping_for_i915_load(); + return 0; out_workqueue_free: |