drm/i915/gen9: Sanitize handling of allowed DC states
We can simplify the conditions selecting the target DC state during
runtime by calculating the allowed DC states in advance during driver
loading. This also makes it easier to disable DC states depending on the
i915.disable_power_well module option, added in the next patch.
v2:
- Print a debug message if the requested max DC value was adjusted due
to a platform limit. Also debug print the calculated mask value. (Patrik)
CC: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1456778945-5411-2-git-send-email-imre.deak@intel.com
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7d2b07f..0e2fb5b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -756,6 +756,7 @@
i915_reg_t mmioaddr[8];
uint32_t mmiodata[8];
uint32_t dc_state;
+ uint32_t allowed_dc_mask;
};
#define DEV_INFO_FOR_EACH_FLAG(func, sep) \