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Message-ID: <9f6a4271-27ae-4e76-9e36-08da59945edf@quicinc.com> Date: Mon, 6 Jan 2025 17:10:49 -0800 From: Abhinav Kumar <quic_abhinavk@...cinc.com> To: Bjorn Andersson <andersson@...nel.org> CC: Rob Clark <robdclark@...il.com>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, "Simona Vetter" <simona@...ll.ch>, Stephen Boyd <swboyd@...omium.org>, "Chandan Uddaraju" <chandanu@...eaurora.org>, Guenter Roeck <groeck@...omium.org>, Kuogee Hsieh <quic_khsieh@...cinc.com>, Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Vara Reddy <quic_varar@...cinc.com>, Rob Clark <robdclark@...omium.org>, Tanmay Shah <tanmay@...eaurora.org>, <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>, <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, Jessica Zhang <quic_jesszhan@...cinc.com>, Laurent Pinchart <laurent.pinchart@...asonboard.com>, Yongxing Mou <quic_yongmou@...cinc.com> Subject: Re: [PATCH 00/45] drm/msm/dp: Add MST support for MSM chipsets Hi Bjorn / Dmitry Happy New Year ! On 1/6/2025 5:06 PM, Bjorn Andersson wrote: > On Thu, Dec 05, 2024 at 08:31:31PM -0800, Abhinav Kumar wrote: > > Please discuss with and reply to Dmitry's questions/feedback on the > list, so that it's possible for others to join the discussion. > > Regards, > Bjorn Sorry for the delay. I got back from vacation only today, I will respond to this feature by next week starting with the bindings as it got delayed due to my vacation. Thanks Abhinav > >> Add support for Multi-stream transport for MSM chipsets that allow >> a single instance of DP controller to send multiple streams. >> >> This series has been validated on sa8775p ride platform using multiple >> MST dongles and also daisy chain method on both DP0 and DP1 upto 1080P. >> >> With 4x4K monitors, due to lack of layer mixers that combination will not >> work but this can be supported as well after some rework on the DPU side. >> >> In addition, SST was re-validated with all these changes to ensure there >> were no regressions. >> >> This patch series was made on top of: >> >> [1] : https://patchwork.freedesktop.org/patch/622243/ (to avoid a log spam) >> [2] : https://patchwork.freedesktop.org/series/142010/ (to fix up HPD) >> [3] : https://patchwork.freedesktop.org/patch/612740/ (to avoid blank screens) >> [4] : https://patchwork.freedesktop.org/series/140216/ (MDSS DT for sa8775p) >> [5] : https://patchwork.kernel.org/project/linux-arm-msm/list/?series=912200 >> (Display Port DT changes for sa8775p) >> >> Bindings for the pixel clock for additional stream is available at : >> >> [6] : https://patchwork.freedesktop.org/series/142016/ >> >> Overall, the patch series has been organized in the following way: >> >> 1) First set are a couple of fixes made while debugging MST but applicable >> to SST as well so go ahead of everything else >> 2) Prepare the DP driver to get ready to handle multiple streams. This is the bulk >> of the work as current DP driver design had to be adjusted to make this happen. >> 3) Finally, new files to handle MST related operations >> >> Validation was done on the latest linux-next on top of above changes and >> both FB console and weston compositors were validated with these changes. >> >> To: Rob Clark <robdclark@...il.com> >> To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org> >> To: Sean Paul <sean@...rly.run> >> To: Marijn Suijten <marijn.suijten@...ainline.org> >> To: David Airlie <airlied@...il.com> >> To: Simona Vetter <simona@...ll.ch> >> To: Stephen Boyd <swboyd@...omium.org> >> To: Chandan Uddaraju <chandanu@...eaurora.org> >> To: Guenter Roeck <groeck@...omium.org> >> To: Kuogee Hsieh <quic_khsieh@...cinc.com> >> To: Bjorn Andersson <andersson@...nel.org> >> To: Konrad Dybcio <konradybcio@...nel.org> >> To: Rob Herring <robh@...nel.org> >> To: Krzysztof Kozlowski <krzk+dt@...nel.org> >> To: Conor Dooley <conor+dt@...nel.org> >> Cc: Vara Reddy <quic_varar@...cinc.com> >> Cc: Rob Clark <robdclark@...omium.org> >> Cc: Tanmay Shah <tanmay@...eaurora.org> >> Cc: linux-arm-msm@...r.kernel.org >> Cc: dri-devel@...ts.freedesktop.org >> Cc: freedreno@...ts.freedesktop.org >> Cc: linux-kernel@...r.kernel.org >> Cc: devicetree@...r.kernel.org >> Cc: Jessica Zhang <quic_jesszhan@...cinc.com> >> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com> >> >> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com> >> --- >> Abhinav Kumar (43): >> drm/msm/dp: dont call dp_catalog_ctrl_mainlink_ctrl in dp_ctrl_configure_source_params() >> drm/msm/dp: disable the opp table request even for dp_ctrl_off_link() >> drm/msm/dp: fix the intf_type of MST interfaces >> drm/msm/dp: split msm_dp_panel_read_sink_caps() into two parts >> drm/msm/dp: add a helper to read mst caps for dp_panel >> drm/msm/dp: remove dp_display's dp_mode and use dp_panel's instead >> drm/msm/dp: break up dp_display_enable into two parts >> drm/msm/dp: re-arrange dp_display_disable() into functional parts >> drm/msm/dp: allow dp_ctrl stream APIs to use any panel passed to it >> drm/msm/dp: move the pixel clock control to its own API >> drm/msm/dp: split dp_ctrl_off() into stream and link parts >> drm/msm/dp: make bridge helpers use dp_display to allow re-use >> drm/msm/dp: separate dp_display_prepare() into its own API >> drm/msm/dp: introduce stream_id for each DP panel >> drm/msm/dp: convert dp_display_set_mode() to use dp_panel argument >> drm/msm/dp: add support for programming p1 register block >> drm/msm/dp: use stream_id to change offsets in dp_catalog >> drm/msm/dp: add support to send ACT packets for MST >> drm/msm/dp: add support to program mst support in mainlink >> drm/msm/dp: no need to update tu calculation for mst >> drm/msm/dp: add support for mst channel slot allocation >> drm/msm/dp: add support to send vcpf packets in dp controller >> drm/msm/dp: always program MST_FIFO_CONSTANT_FILL for MST >> drm/msm/dp: abstract out the dp_display stream helpers to accept a panel >> drm/msm/dp: move link related operations to dp_display_unprepare() >> drm/msm/dp: replace power_on with active_stream_cnt for dp_display >> drm/msm/dp: make the SST bridge disconnected when mst is active >> drm/msm/dp: add an API to initialize MST on sink side >> drm/msm/dp: skip reading the EDID for MST cases >> drm/msm/dp: add dp_display_get_panel() to initialize DP panel >> drm/msm/dp: add dp_mst_drm to manage DP MST bridge operations >> drm/msm/dp: add connector abstraction for DP MST >> drm/msm/dp: add irq hpd callback for dp mst >> drm/msm/dp: add support to re-use and clear the panel edid >> drm/msm/dp: add a mst session mutex to protect bridge ops >> drm/msm: add support for non-blocking commits >> drm/msm: initialize DRM MST encoders for DP controllers >> drm/msm/dp: initialize dp_mst module for each DP MST controller >> drm/msm: add a stream to intf map for DP controller >> drm/msm/dpu: use msm_dp_get_mst_intf_id() to get the intf id >> drm/msm/dp: mark ST_DISCONNECTED only if all streams are disabled >> drm/msm/dp: populate the max_streams for sa8775 mst controller >> arm64: dts: qcom: add mst support for pixel 1 stream clk for DP1 >> >> Yongxing Mou (2): >> drm/msm/dp: propagate hpd state changes to dp mst module >> arm64: dts: qcom: add mst support for pixel stream clk for DP0 >> >> arch/arm64/boot/dts/qcom/sa8775p.dtsi | 23 +- >> drivers/gpu/drm/msm/Makefile | 3 +- >> .../drm/msm/disp/dpu1/catalog/dpu_8_4_sa8775p.h | 8 +- >> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 25 +- >> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h | 2 + >> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 29 +- >> drivers/gpu/drm/msm/dp/dp_audio.c | 2 +- >> drivers/gpu/drm/msm/dp/dp_aux.h | 1 + >> drivers/gpu/drm/msm/dp/dp_catalog.c | 292 ++++- >> drivers/gpu/drm/msm/dp/dp_catalog.h | 27 + >> drivers/gpu/drm/msm/dp/dp_ctrl.c | 454 ++++++-- >> drivers/gpu/drm/msm/dp/dp_ctrl.h | 21 +- >> drivers/gpu/drm/msm/dp/dp_display.c | 559 +++++++--- >> drivers/gpu/drm/msm/dp/dp_display.h | 33 +- >> drivers/gpu/drm/msm/dp/dp_drm.c | 53 +- >> drivers/gpu/drm/msm/dp/dp_drm.h | 12 - >> drivers/gpu/drm/msm/dp/dp_mst_drm.c | 1118 ++++++++++++++++++++ >> drivers/gpu/drm/msm/dp/dp_mst_drm.h | 110 ++ >> drivers/gpu/drm/msm/dp/dp_panel.c | 41 +- >> drivers/gpu/drm/msm/dp/dp_panel.h | 15 +- >> drivers/gpu/drm/msm/dp/dp_reg.h | 25 +- >> drivers/gpu/drm/msm/msm_atomic.c | 2 + >> drivers/gpu/drm/msm/msm_drv.h | 29 + >> drivers/gpu/drm/msm/msm_kms.c | 1 + >> 24 files changed, 2589 insertions(+), 296 deletions(-) >> --- >> base-commit: b166256c1e6ce356fa1404d4c8531830e6f100a8 >> change-id: 20241205-dp_mst-d62fa86257ed >> >> Best regards, >> -- >> Abhinav Kumar <quic_abhinavk@...cinc.com> >>
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