Hi Suraj,
On Thu, Apr 28, 2022 at 05:51:47AM +0000, Kandpal, Suraj wrote:
++Laurent ,Dmitry, and Abhinav
Hi, Can you have a look at the private implementation i915 is currently going with till we can figure out how to work with drm core .
No, sorry, I barely have time to follow up on core DRM changes, I can't help with private i915 topics in my spare time.
A patch series was floated in the drm mailing list which aimed to change the drm_connector and drm_encoder fields to pointer in the drm_connector_writeback structure, this received a huge pushback from the community but since i915 expects each connector present in the drm_device list to be a intel_connector but drm_writeback framework. [1] https://patchwork.kernel.org/project/dri- devel/patch/20220202081702.22119-1-suraj.kandpal@intel.com/ [2] https://patchwork.kernel.org/project/dri- devel/patch/20220202085429.22261-6-suraj.kandpal@intel.com/ This forces us to use a drm_connector which is not embedded in intel_connector the current drm_writeback framework becomes very unfeasible to us as it would mean a lot of checks at a lot of places to take into account the above issue.Since no one had an issue with encoder field being changed into a pointer it was decided to break the connector and encoder pointer changes into two different series.The encoder field changes is currently being worked upon by Abhinav Kumar [3]https://patchwork.kernel.org/project/dri-devel/list/?series=633565 In the meantime for i915 to start using the writeback functionality we came up with a interim solution to own writeback pipeline bypassing one provided by drm which is what these patches do. Note: these are temp patches till we figure out how we can either change drm core writeback to work with our intel_connector structure or find a different solution which allows us to work with the current drm_writeback framework
Suraj Kandpal (3): drm/i915: Creating writeback pipeline to bypass drm_writeback framework drm/i915: Define WD trancoder for i915 drm/i915: Enabling WD Transcoder
drivers/gpu/drm/i915/Makefile | 2 + drivers/gpu/drm/i915/display/intel_acpi.c | 1 + drivers/gpu/drm/i915/display/intel_display.c | 89 +- drivers/gpu/drm/i915/display/intel_display.h | 15 + .../drm/i915/display/intel_display_types.h | 18 + drivers/gpu/drm/i915/display/intel_dpll.c | 3 + drivers/gpu/drm/i915/display/intel_opregion.c | 3 + .../gpu/drm/i915/display/intel_wb_connector.c | 296 ++++++ .../gpu/drm/i915/display/intel_wb_connector.h | 99 ++ drivers/gpu/drm/i915/display/intel_wd.c | 978 ++++++++++++++++++ drivers/gpu/drm/i915/display/intel_wd.h | 82 ++ drivers/gpu/drm/i915/i915_drv.h | 5 + drivers/gpu/drm/i915/i915_irq.c | 8 +- drivers/gpu/drm/i915/i915_pci.c | 7 +- drivers/gpu/drm/i915/i915_reg.h | 139 +++ 15 files changed, 1742 insertions(+), 3 deletions(-) create mode 100644 drivers/gpu/drm/i915/display/intel_wb_connector.c create mode 100644 drivers/gpu/drm/i915/display/intel_wb_connector.h create mode 100644 drivers/gpu/drm/i915/display/intel_wd.c create mode 100644 drivers/gpu/drm/i915/display/intel_wd.h