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0d77a3e0ea
Add support for blocking the IRQ handling on the HPD pin of a given encoder, handling IRQs that arrived while in the blocked state after unblocking the IRQ handling. This will be used by a follow-up change, which blocks/unblocks the IRQ handling around DP link training. This is similar to the intel_hpd_disable/enable() functionality, by also handling encoders/ports with a pulse handler (i.e. also blocking/unblocking the short/long pulse handling) and handling the IRQs arrived in the blocked state after the handling is unblocked (vs. just dropping such IRQs). v2: - Handle encoders without a port assigned to them. - Fix clearing IRQs from intel_hotplug::short_port_mask. v3: - Rename intel_hpd_suspend/resume() to intel_hpd_block/unblock(). (Jani) - Refer to HPD pins as hpd_pin vs. hpd. - Flush dig_port_work in intel_hpd_block() if any encoder using the HPD pin has a pulse handler. v4: - Fix hpd_pin_has_pulse(), checking the encoder's HPD pin. v5: - Rebase on port->hpd_pin tracking. (Ville) v6: (Jani) - Add hpd_pin_is_blocked() helper. - Use the hpd_pin_mask term for a mask of pins instead of hpd_pins. - Prevent decrementing a 0 refcount in unblock_hpd_pin(). Cc: Jani Nikula <jani.nikula@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250305114820.3523077-1-imre.deak@intel.com
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
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText 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.