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drm/i915: add dynamic performance control support for Ironlake

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Ironlake (and 965GM, which this patch doesn't support) supports a
hardware performance and power management feature that allows it to
adjust to changes in GPU load over time with software help.  The goal
if this is to maximize performance/power for a given workload.

This patch enables that feature, which is also a requirement for
supporting Intelligent Power Sharing, a feature which allows for
dynamic budgeting of power between the CPU and GPU in Arrandale
platforms.

Tested-by: ykzhao <yakui.zhao@intel.com>
[anholt: Resolved against the irq handler loop removal]
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Jesse Barnes
2010-01-29 11:27:07 -08:00
committed by Eric Anholt
parent ee980b8003
commit f97108d1d0
8 changed files with 411 additions and 10 deletions
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drivers/gpu/drm/i915/i915_drv.h
+6
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@@ -452,6 +452,7 @@ typedef struct drm_i915_private {
u32 savePIPEB_DATA_N1;
u32 savePIPEB_LINK_M1;
u32 savePIPEB_LINK_N1;
u32 saveRSTDBYCTL;
struct {
struct drm_mm gtt_space;
@@ -590,7 +591,12 @@ typedef struct drm_i915_private {
int child_dev_num;
struct child_device_config *child_dev;
struct drm_connector *int_lvds_connector;
bool mchbar_need_disable;
u8 cur_delay;
u8 min_delay;
u8 max_delay;
} drm_i915_private_t;
/** driver private structure attached to each drm_gem_object */