> -----Original Message----- > From: Doug Anderson <dianders@xxxxxxxxxxxx> > Sent: Thursday, March 2, 2023 2:02 AM > To: Vinod Polimera (QUIC) <quic_vpolimer@xxxxxxxxxxx> > Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx; linux-arm-msm@xxxxxxxxxxxxxxx; > freedreno@xxxxxxxxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; robdclark@xxxxxxxxx; swboyd@xxxxxxxxxxxx; > Kalyan Thota (QUIC) <quic_kalyant@xxxxxxxxxxx>; > dmitry.baryshkov@xxxxxxxxxx; Kuogee Hsieh (QUIC) > <quic_khsieh@xxxxxxxxxxx>; Vishnuvardhan Prodduturi (QUIC) > <quic_vproddut@xxxxxxxxxxx>; Bjorn Andersson (QUIC) > <quic_bjorande@xxxxxxxxxxx>; Abhinav Kumar (QUIC) > <quic_abhinavk@xxxxxxxxxxx>; Sankeerth Billakanti (QUIC) > <quic_sbillaka@xxxxxxxxxxx> > Subject: Re: [PATCH v13 00/13] Add PSR support for eDP > > Hi, > > On Wed, Mar 1, 2023 at 11:06 AM Doug Anderson > <dianders@xxxxxxxxxxxx> wrote: > > > > Hi, > > > > On Sun, Feb 12, 2023 at 8:29 AM Vinod Polimera > > <quic_vpolimer@xxxxxxxxxxx> wrote: > > > > > > Changes in v2: > > > - Use dp bridge to set psr entry/exit instead of dpu_enocder. > > > - Don't modify whitespaces. > > > - Set self refresh aware from atomic_check. > > > - Set self refresh aware only if psr is supported. > > > - Provide a stub for msm_dp_display_set_psr. > > > - Move dp functions to bridge code. > > > > > > Changes in v3: > > > - Change callback names to reflect atomic interfaces. > > > - Move bridge callback change to separate patch as suggested by Dmitry. > > > - Remove psr function declaration from msm_drv.h. > > > - Set self_refresh_aware flag only if psr is supported. > > > - Modify the variable names to simpler form. > > > - Define bit fields for PSR settings. > > > - Add comments explaining the steps to enter/exit psr. > > > - Change DRM_INFO to drm_dbg_db. > > > > > > Changes in v4: > > > - Move the get crtc functions to drm_atomic. > > > - Add atomic functions for DP bridge too. > > > - Add ternary operator to choose eDP or DP ops. > > > - Return true/false instead of 1/0. > > > - mode_valid missing in the eDP bridge ops. > > > - Move the functions to get crtc into drm_atomic.c. > > > - Fix compilation issues. > > > - Remove dpu_assign_crtc and get crtc from drm_enc instead of > dpu_enc. > > > - Check for crtc state enable while reserving resources. > > > > > > Changes in v5: > > > - Move the mode_valid changes into a different patch. > > > - Complete psr_op_comp only when isr is set. > > > - Move the DP atomic callback changes to a different patch. > > > - Get crtc from drm connector state crtc. > > > - Move to separate patch for check for crtc state enable while > > > reserving resources. > > > > > > Changes in v6: > > > - Remove crtc from dpu_encoder_virt struct. > > > - fix crtc check during vblank toggle crtc. > > > - Misc changes. > > > > > > Changes in v7: > > > - Add fix for underrun issue on kasan build. > > > > > > Changes in v8: > > > - Drop the enc spinlock as it won't serve any purpose in > > > protetcing conn state.(Dmitry/Doug) > > > > > > Changes in v9: > > > - Update commit message and fix alignment using spaces.(Marijn) > > > - Misc changes.(Marijn) > > > > > > Changes in v10: > > > - Get crtc cached in dpu_enc during obj init.(Dmitry) > > > > > > Changes in v11: > > > - Remove crtc cached in dpu_enc during obj init. > > > - Update dpu_enc crtc state on crtc enable/disable during self refresh. > > > > > > Changes in v12: > > > - Update sc7180 intf mask to get intf timing gen status > > > based on DPU_INTF_STATUS_SUPPORTED bit.(Dmitry) > > > - Remove "clear active interface in the datapath cleanup" change > > > as it is already included. > > > > > > Changes in v13: > > > - Move core changes to top of the series.(Dmitry) > > > - Drop self refresh aware disable change after psr entry.(Dmitry) > > > > > > Vinod Polimera (13): > > > drm: add helper functions to retrieve old and new crtc > > > drm/bridge: use atomic enable/disable callbacks for panel bridge > > > drm/bridge: add psr support for panel bridge callbacks > > > drm/msm/disp/dpu: check for crtc enable rather than crtc active to > > > release shared resources > > > drm/msm/disp/dpu: get timing engine status from intf status register > > > drm/msm/disp/dpu: wait for extra vsync till timing engine status is > > > disabled > > > drm/msm/disp/dpu: reset the datapath after timing engine disable > > > drm/msm/dp: use atomic callbacks for DP bridge ops > > > drm/msm/dp: Add basic PSR support for eDP > > > drm/msm/dp: use the eDP bridge ops to validate eDP modes > > > drm/msm/disp/dpu: use atomic enable/disable callbacks for encoder > > > functions > > > drm/msm/disp/dpu: add PSR support for eDP interface in dpu driver > > > drm/msm/disp/dpu: update dpu_enc crtc state on crtc enable/disable > > > during self refresh > > > > I'm curious what the plan is for landing this series. I could land the > > first two in drm-misc if you want, but I'm a lowly committer and so I > > couldn't make an immutable branch for you nor can I officially Ack the > > changes to land in your branch. That means you'd be blocked for an > > extra version. Do you already have a plan? If not, then maybe we need > > to get in touch with one of the maintainers [1] of drm-misc? That's > > documented [2] to be in their set of responsibilities. > > > > [1] https://drm.pages.freedesktop.org/maintainer- > tools/repositories.html#drm-misc-repository > > [2] https://drm.pages.freedesktop.org/maintainer-tools/maintainer-drm- > misc.html#maintainer-s-duties > > The above question about how we'd land this is still a good one, but > perhaps less relevant quite yet because, at least in my testing, the > current series doesn't work. :-/ > > I know previous versions worked, so I went back and tried older > versions. It turns out that v12 _does_ work for me, but v13 doesn't > work. The difference is very small. I'm assuming you made some changes > in v13 and they looked so small that you just sent v13 out without > testing? ...or, of course, there's always a possibility that I messed > up in testing this myself, though I did repeat my results and they > were consistent. > > FWIW, my testing was roughly to do this on a device that had a > PSR-enabled eDP display: > > echo "dp_catalog_ctrl_set_psr" > > /sys/kernel/debug/tracing/set_ftrace_filter > echo function > /sys/kernel/debug/tracing/current_tracer > echo 1 > /sys/kernel/debug/tracing/tracing_on > cat /sys/kernel/debug/tracing/trace_pipe > > I should see a splat in the trace buffers each time PSR is entered or > exited. On v12 I get splats as the cursor on my screen blinks. On v13, > it's just silence. > > Please confirm that you tested v13. If you're confident that v13 works > then I can dig further myself. Thanks, Doug for catching this. I didn't per say test V13 as I did not make any changes apart from dropping a patch for flicker. Apparently flicker fix was reusing self-refresh aware variable and dropping the patch caused not to initialize it. It was an honest mistake. I pushed a new patch to set self-refresh aware as part of v14. It includes all the untouched patches of v13 plus one additional patch to set self-refresh aware. I have tested these changes and PSR is getting exercised. Thanks Again, Vinod > > -Doug
