kernel.git/drivers/gpu/drm/msm/dp/dp_ctrl.c, branch linux-5.13.y

drm/msm/dp: do not end dp link training until video is ready

2021-09-18T11:42:11Z

[ Upstream commit 2e0adc765d884cc080baa501e250bfad97035b09 ] Initialize both pre-emphasis and voltage swing level to 0 before start link training and do not end link training until video is ready to reduce the period between end of link training and video start to meet Link Layer CTS requirement. Some dongle main link symbol may become unlocked again if host did not end link training soon enough after completion of link training 2. Host have to re train main link if loss of symbol locked detected before end link training so that the coming video stream can be transmitted to sink properly. This fixes Link Layer CTS cases 4.3.2.1, 4.3.2.2, 4.3.2.3 and 4.3.2.4. Changes in v3: -- merge retrain link if loss of symbol locked happen into this patch -- replace dp_ctrl_loss_symbol_lock() with dp_ctrl_channel_eq_ok() Signed-off-by: Kuogee Hsieh Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1628196295-7382-7-git-send-email-khsieh@codeaurora.org Signed-off-by: Rob Clark Signed-off-by: Sasha Levin

drm/msm/dp: reduce link rate if failed at link training 1

2021-09-18T11:42:10Z

[ Upstream commit 4b85d405cfe938ae7ad61656484ae88dee289e3b ] Reduce link rate and re start link training if link training 1 failed due to loss of clock recovery done to fix Link Layer CTS case 4.3.1.7. Also only update voltage and pre-emphasis swing level after link training started to fix Link Layer CTS case 4.3.1.6. Changes in V2: -- replaced cr_status with link_status[DP_LINK_STATUS_SIZE] -- replaced dp_ctrl_any_lane_cr_done() with dp_ctrl_colco_recovery_any_ok() -- replaced dp_ctrl_any_ane_cr_lose() with !drm_dp_clock_recovery_ok() Changes in V3: -- return failed if lane_count <= 1 Signed-off-by: Kuogee Hsieh Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1628196295-7382-3-git-send-email-khsieh@codeaurora.org [remove unused cr_status variable] Signed-off-by: Rob Clark Signed-off-by: Sasha Levin

drm/msm/dp: use dp_ctrl_off_link_stream during PHY compliance test run

2021-08-04T10:47:54Z

[ Upstream commit 7591c532b818ef4b8e3e635d842547c08b3a32b4 ] DP cable should always connect to DPU during the entire PHY compliance testing run. Since DP PHY compliance test is executed at irq_hpd event context, dp_ctrl_off_link_stream() should be used instead of dp_ctrl_off(). dp_ctrl_off() is used for unplug event which is triggered when DP cable is dis connected. Changes in V2: -- add fixes statement Fixes: f21c8a276c2d ("drm/msm/dp: handle irq_hpd with sink_count = 0 correctly") Signed-off-by: Kuogee Hsieh Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1626191647-13901-2-git-send-email-khsieh@codeaurora.org Signed-off-by: Rob Clark Signed-off-by: Sasha Levin

drm/msm/dp: handle irq_hpd with sink_count = 0 correctly

2021-07-14T15:07:16Z

[ Upstream commit f21c8a276c2daddddf58d483b49b01d0603f0316 ] irq_hpd interrupt should be handled after dongle plugged in and before dongle unplugged. Hence irq_hpd interrupt is enabled at the end of the plugin handle and disabled at the beginning of unplugged handle. Current irq_hpd with sink_count = 0 is wrongly handled same as the dongle unplugged which tears down the mainlink and disables the phy. This patch fixes this problem by only tearing down the mainlink but keeping phy enabled at irq_hpd with sink_count = 0 handle so that next irq_hpd with sink_count =1 can be handled by setup mainlink only. This patch also set dongle into D3 (power off) state at end of handling irq_hpd with sink_count = 0. Changes in v2: -- add ctrl->phy_Power_count Changes in v3: -- del ctrl->phy_Power_count -- add phy_power_off to dp_ctrl_off_link_stream() Changes in v4: -- return immediately if clock disable failed at dp_ctrl_off_link_stream() Changes in v5: -- set dongle to D3 (power off) state at dp_ctrl_off_link_stream() Changes in v6: -- add Fixes tag Fixes: ea9f337ce81e ("drm/msm/dp: reset dp controller only at boot up and pm_resume") Signed-off-by: Kuogee Hsieh Tested-by: Stephen Boyd Reviewed-by: Stephen Boyd Link: https://lore.kernel.org/r/1621635930-30161-1-git-send-email-khsieh@codeaurora.org Signed-off-by: Rob Clark Signed-off-by: Sasha Levin

Merge tag 'drm-msm-next-2021-02-07' of https://gitlab.freedesktop.org/drm/msm into drm-next

2021-02-24T23:27:42Z

* a6xx speedbin support * a508, a509, a512 support * various a5xx fixes * various dpu fixes * qseed3lite support for sm8250 * dsi fix for msm8994 * mdp5 fix for framerate bug with cmd mode panels * a6xx GMU OOB race fixes that were showing up in CI * various addition and removal of semicolons * gem submit fix for legacy userspace relocs path Signed-off-by: Dave Airlie From: Rob Clark Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGvh3tvLz_xtk=4x9xUfo2h2s4xkniOvC7HyLO2jrXnXkw@mail.gmail.com

drm/msm/dp: Add a missing semi-colon

2021-02-07T17:57:04Z

A missing semicolon here causes my external display to stop working. Indeed, missing the semicolon on the return statement leads to dp_panel_update_tu_timings() not existing because the compiler thinks it's part of the return statement of a void function, so it must not be important. $ ./scripts/bloat-o-meter before.o after.o add/remove: 1/1 grow/shrink: 0/1 up/down: 7400/-7540 (-140) Function old new delta dp_panel_update_tu_timings - 7400 +7400 _dp_ctrl_calc_tu.constprop 18024 17900 -124 dp_panel_update_tu_timings.constprop 7416 - -7416 Total: Before=54440, After=54300, chg -0.26% Add a semicolon so this function works like it used to. Cc: Sean Paul Cc: Kuogee Hsieh Cc: linux-arm-msm@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: freedreno@lists.freedesktop.org Cc: Lee Jones Fixes: cc9014bf63a4 ("drm/msm/dp/dp_ctrl: Move 'tu' from the stack to the heap") Signed-off-by: Stephen Boyd Signed-off-by: Rob Clark

drm/msm/dp: reset dp controller only at boot up and pm_resume

2021-02-06T17:28:17Z

DP_SW_RESET is the global SW reset that is used to initialize DP controller. If DP_SW_RESET executed during connection setup, two HPD related side effects may occurred, 1) pending HPD interrupts cleared unexpected 2) re start debounce logic which trigger another interrupt This patch only issue DP_SW_RESET at boot up and pm_resume. This patch also reinit video_comp before configure dp controller to avoid missing VIDEO_READY interrupt. Fixes: 9fc418430c65 ("drm/msm/dp: unplug interrupt missed after irq_hpd handler") Signed-off-by: Kuogee Hsieh Reviewed-by: Stephen Boyd Signed-off-by: Rob Clark

drm/msm/dp/dp_ctrl: Remove unneeded semicolon

2021-01-31T19:34:37Z

fix semicolon.cocci warnings: drivers/gpu/drm/msm/dp/dp_ctrl.c:1161:2-3: Unneeded semicolon Signed-off-by: Xu Wang Signed-off-by: Rob Clark

drm/msm/dp: unplug interrupt missed after irq_hpd handler

2021-01-31T19:34:36Z

There is HPD unplug interrupts missed at scenario of an irq_hpd followed by unplug interrupts with around 10 ms in between. Since both AUX_SW_RESET and DP_SW_RESET clear pending HPD interrupts, irq_hpd handler should not issues either aux or sw reset to avoid following unplug interrupt be cleared accidentally. This patch also postpone handling of irq_hpd until connected state if it happened at connection pending state. Changes in V2: -- add postpone handling of irq_hpd until connected state -- check DP_TRAINING_1 instead of DP_TRAINING_NONE Signed-off-by: Kuogee Hsieh Signed-off-by: Rob Clark

drm/msm/dp: fix build after dp quirk helper change

2021-01-21T13:11:21Z

Commit 7c553f8b5a7d ("drm/dp: Revert "drm/dp: Introduce EDID-based quirks"") removed drm_dp_get_edid_quirks() and changed the signature of drm_dp_has_quirk() while they were still being used in msm. Fix the breakage. Functionally, removing the EDID-based quirks has no impact on msm. [The above commit was merged to drm-intel-next; make two wrongs a right by merging this fix through drm-intel-next as well.] Reported-by: Stephen Rothwell References: http://lore.kernel.org/r/20210120105715.4391dd95@canb.auug.org.au Fixes: 7c553f8b5a7d ("drm/dp: Revert "drm/dp: Introduce EDID-based quirks"") Cc: Lyude Paul Acked-by: Daniel Vetter Cc: Rob Clark Cc: Sean Paul Cc: dri-devel@lists.freedesktop.org Reviewed-by: Lyude Paul Tested-by: Fabio Estevam Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20210120110708.32131-1-jani.nikula@intel.com