DPU supports a single writeback session running concurrently with primary display when the CWB mux is configured properly. This series enables clone mode for DPU driver and adds support for programming the CWB mux in cases where the hardware has dedicated CWB pingpong blocks. Currently, the CWB hardware blocks have only been added to the SM8650 hardware catalog and only DSI has been exposed as a possible_clone of WB. This changes are split into two parts: The first part of the series will pull in Dmitry's patches to refactor the DPU resource manager to be based off of CRTC instead of encoder. This includes some changes (noted in the relevant commits) by me and Abhinav to fix some issues with getting the global state and refactoring the CDM allocation to work with Dmitry's changes. The second part of the series will add support for CWB by doing the following: 1) Add a DRM helper to detect if the current CRTC state is in clone mode and add an "in_clone_mode" entry to the atomic state print 2) Add the CWB mux to the hardware catalog and clarify the pingpong block index enum to specifiy which pingpong blocks are dedicated to CWB only and which ones are general use pingpong blocks 3) Add CWB as part of the devcoredump 4) Add support for configuring the CWB mux via dpu_hw_cwb ops 5) Add pending flush support for CWB 6) Add support for validating clone mode in the DPU CRTC and setting up CWB within the encoder 7) Adjust the encoder trigger flush, trigger start, and kickoff order to accomodate clone mode 8) Adjust when the frame done timer is started for clone mode 9) Define the possible clones for DPU encoders so that The feature was tested on SM8650 using IGT's kms_writeback test with the following change [1] and dumping the writeback framebuffer when in clone mode. I haven't gotten the chance to test it on DP yet, but I've validated both single and dual LM on DSI. To test CWB with IGT, you'll need to apply this series [1] and this driver patch [2]. Run the following command to dump the writeback buffer: IGT_FRAME_DUMP_PATH=<dump path> FRAME_PNG_FILE_NAME=<file name> \ ./build/tests/kms_writeback -d [--run-subtest dump-valid-clones] \ You can also do CRC validation by running this command: ./build/tests/kms_writeback [--run-subtest dump-valid-clones] NOTE: We are planning to post KUnit tests for the DRM framework changes as a separate series [1] https://patchwork.freedesktop.org/series/137933/ [2] https://patchwork.freedesktop.org/series/138284/ --- Changes in v3: - Dropped support for CWB on DP connectors for now - Dropped unnecessary PINGPONG array in *_setup_cwb() - Add a check to make sure CWB and CDM aren't supported simultaneously (Dmitry) - Document cwb_enabled checks in dpu_crtc_get_topology() (Dmitry) - Moved implementation of drm_crtc_in_clone_mode() to drm_crtc.c (Jani) - Dropped duplicate error message for reserving CWB resources (Dmitry) - Added notes in framework changes about posting a separate series to add proper KUnit tests (Maxime) - Added commit message note addressing Sima's comment on handling mode_changed (Dmitry) - Formatting fixes (Dmitry) - Added proper kerneldocs (Dmitry) - Renamed dpu_encoder_helper_get_cwb() -> *_get_cwb_mask() (Dmitry) - Capitalize all instances of "pingpong" in comments (Dmitry) - Link to v2: https://lore.kernel.org/r/20240924-concurrent-wb-v2-0-7849f900e863@xxxxxxxxxxx Changes in v2: - Moved CWB hardware programming to its own dpu_hw_cwb abstraction (Dmitry) - Reserve and get assigned CWB muxes using RM API and KMS global state (Dmitry) - Dropped requirement to have only one CWB session at a time - Moved valid clone mode check to DRM framework (Dmitry and Ville) - Switch to default CWB tap point to LM as the DSPP - Dropped printing clone mode status in atomic state (Dmitry) - Call dpu_vbif_clear_errors() before dpu_encoder_kickoff() (Dmitry) - Squashed setup_input_ctrl() and setup_input_mode() into a single dpu_hw_cwb op (Dmitry) - Moved function comment docs to correct place and fixed wording of comments/commit messages (Dmitry) - Grabbed old CRTC state using proper drm_atomic_state API in dpu_crtc_atomic_check() (Dmitry) - Split HW catalog changes of adding the CWB mux block and changing the dedicated CWB pingpong indices into 2 separate commits (Dmitry) - Moved clearing the dpu_crtc_state.num_mixers to "drm/msm/dpu: fill CRTC resources in dpu_crtc.c" (Dmitry) - Fixed alignment and other formatting issues (Dmitry) - Link to v1: https://lore.kernel.org/r/20240829-concurrent-wb-v1-0-502b16ae2ebb@xxxxxxxxxxx --- Dmitry Baryshkov (4): drm/msm/dpu: get rid of struct dpu_rm_requirements drm/msm/dpu: switch RM to use crtc_id rather than enc_id for allocation drm/msm/dpu: move resource allocation to CRTC drm/msm/dpu: fill CRTC resources in dpu_crtc.c Esha Bharadwaj (3): drm/msm/dpu: Add CWB entry to catalog for SM8650 drm/msm/dpu: add devcoredumps for cwb registers drm/msm/dpu: add CWB support to dpu_hw_wb Jessica Zhang (16): drm: add clone mode check for CRTC drm: Add valid clones check drm/msm/dpu: Specify dedicated CWB pingpong blocks drm/msm/dpu: Add dpu_hw_cwb abstraction for CWB block drm/msm/dpu: Add RM support for allocating CWB drm/msm/dpu: Add CWB to msm_display_topology drm/msm/dpu: Require modeset if clone mode status changes drm/msm/dpu: Fail atomic_check if CWB and CDM are enabled drm/msm/dpu: Reserve resources for CWB drm/msm/dpu: Configure CWB in writeback encoder drm/msm/dpu: Support CWB in dpu_hw_ctl drm/msm/dpu: Adjust writeback phys encoder setup for CWB drm/msm/dpu: Start frame done timer after encoder kickoff drm/msm/dpu: Skip trigger flush and start for CWB drm/msm/dpu: Reorder encoder kickoff for CWB drm/msm/dpu: Set possible clones for all encoders drivers/gpu/drm/drm_atomic_helper.c | 23 ++ drivers/gpu/drm/drm_crtc.c | 20 + drivers/gpu/drm/msm/Makefile | 1 + .../drm/msm/disp/dpu1/catalog/dpu_10_0_sm8650.h | 29 +- .../gpu/drm/msm/disp/dpu1/catalog/dpu_8_1_sm8450.h | 4 +- .../gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h | 4 +- .../drm/msm/disp/dpu1/catalog/dpu_9_2_x1e80100.h | 4 +- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 211 +++++++++- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 426 +++++++++++++-------- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 25 +- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 12 +- .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys_wb.c | 16 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 13 + drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c | 30 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h | 15 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.c | 73 ++++ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h | 70 ++++ drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h | 15 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_wb.c | 4 +- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 12 +- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 13 +- drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 353 ++++++++++------- drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h | 16 +- drivers/gpu/drm/msm/msm_drv.h | 2 + include/drm/drm_crtc.h | 2 +- 25 files changed, 1037 insertions(+), 356 deletions(-) --- base-commit: 2023aaa11289cab27f69cf7e8111fd233cdf3170 change-id: 20240618-concurrent-wb-97d62387f952 Best regards, -- Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
