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Currently DP driver is executed independent of PM runtime framework. This leads msm eDP panel can not being detected by edp_panel driver during generic_edp_panel_probe() due to AUX DPCD read failed at edp panel driver. Incorporate PM runtime framework into DP driver so that host controller's power and clocks are enable/disable through PM runtime mechanism. Once PM runtime framework is incorporated into DP driver, waking up device from power up path is not necessary. Hence remove it. After incorporating pm_runtime framework into eDP/DP driver, dp_pm_suspend() to handle power off both DP phy and controller during suspend and dp_pm_resume() to handle power on both DP phy and controller during resume are not necessary. Therefore both dp_pm_suspend() and dp_pm_resume() are dropped and replace with dp_pm_runtime_suspend() and dp_pm_runtime_resume() respectively. Changes in v9: -- silent compiler warning message at dp_power_init() and dp_power_deinit() with W1 flag Changes in v7: -- add comments to dp_pm_runtime_resume() -- add comments to dp_bridge_hpd_enable() -- delete dp->hpd_state = ST_DISCONNECTED from dp_bridge_hpd_notify() Changes in v6: -- delete dp_power_client_deinit(dp->power); -- remove if (!dp->dp_display.is_edp) condition checkout at plug_handle() -- remove if (!dp->dp_display.is_edp) condition checkout at unplug_handle() -- add IRQF_NO_AUTOEN to devm_request_irq() -- add enable_irq() and disable_irq() to pm_runtime_resume()/suspend() -- del dp->hpd_state = ST_DISCONNECTED from dp_bridge_hpd_disable() Changes in v5: -- remove pm_runtime_put_autosuspend feature, use pm_runtime_put_sync() -- squash add pm_runtime_force_suspend()/resume() patch into this patch Changes in v4: -- reworded commit text to explain why pm_framework is required for edp panel -- reworded commit text to explain autosuspend is choiced -- delete EV_POWER_PM_GET and PM_EV_POWER_PUT from changes #3 -- delete dp_display_pm_get() and dp_display_pm_Put() from changes #3 -- return value from pm_runtime_resume_and_get() directly -- check return value of devm_pm_runtime_enable() -- delete pm_runtime_xxx from dp_display_remove() -- drop dp_display_host_init() from EV_HPD_INIT_SETUP -- drop both dp_pm_prepare() and dp_pm_compete() from this change -- delete ST_SUSPENDED state -- rewording commit text to add more details regrading the purpose of this change Changes in v3: -- incorporate removing pm_runtime_xx() from dp_pwer.c to this patch -- use pm_runtime_resume_and_get() instead of pm_runtime_get() -- error checking pm_runtime_resume_and_get() return value -- add EV_POWER_PM_GET and PM_EV_POWER_PUT to handle HPD_GPIO case -- replace dp_pm_suspend() with pm_runtime_force_suspend() -- replace dp_pm_resume() with pm_runtime_force_resume() Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Patchwork: https://patchwork.freedesktop.org/patch/570073/ Link: https://lore.kernel.org/r/1701472789-25951-6-git-send-email-quic_khsieh@quicinc.com Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.