xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/i915/gen9: Fix runtime PM refcounting in case DMC firmware isn't loaded

Browse Source 
While we disable runtime PM and with that display power well support if
the DMC firmware isn't loaded, we still want to disable power wells
during system suspend and driver unload. So drop/reacquire the
corresponding power refcount during suspend/resume and driver unloading.
This also means we have to check if DMC is not loaded and skip enabling
DC states in the power well code.

v2:
- Reuse intel_csr_ucode_suspend() in intel_csr_ucode_fini() instead of
  opencoding the former. (Chris)
- Add docbook comment to the public resume and suspend functions.

CC: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1460980101-14713-1-git-send-email-imre.deak@intel.com
This commit is contained in:
Imre Deak
2016-04-18 14:48:21 +03:00
parent bf93ba67e9
commit f74ed08d55
4 changed files with 50 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/intel_drv.h
View File

@@ -1275,6 +1275,8 @@ u32 skl_plane_ctl_rotation(unsigned int rotation);
void intel_csr_ucode_init(struct drm_i915_private *);
void intel_csr_load_program(struct drm_i915_private *);
void intel_csr_ucode_fini(struct drm_i915_private *);
void intel_csr_ucode_suspend(struct drm_i915_private *);
void intel_csr_ucode_resume(struct drm_i915_private *);
/* intel_dp.c */
void intel_dp_init(struct drm_device *dev, i915_reg_t output_reg, enum port port);