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path: root/drivers/gpu/drm/i915/display/intel_hdcp_gsc.h
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2025-05-02drm/i915/hdcp: drop unnecessary include from intel_hdcp_gsc.hJani Nikula
Nothing in intel_hdcp_gsc.c needs linux/err.h. Remove it. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/26ae2c04554fc8dd76d2fdb0f2b0a63cb1fed98f.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: pass struct drm_device to driver specific HDCP GSC codeJani Nikula
The driver specific HDCP GSC code will eventually be part of the driver cores rather than display. Remove the struct intel_display references from them, and pass struct drm_device instead. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/bf9aa8e44e18eef41e3077a2966935b4e2649b62.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: simplify HDCP GSC firmware usage selectionJani Nikula
Just localize the GSC decision inside intel_hdcp.c, and deduplicate the conditions. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/a1d031bfbff7073e576dfe8d3d3d5a28d7bb2c15.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: switch the HDCP GSC message interface from u8* to void*Jani Nikula
The in/out buffers are just opaque data, and don't need to be considered u8*. Switching to void* lets us drop a ton of unnecessary casts. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/ea005adb713e85b797d83204c80de0a2a8e5ab47.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: pass the context to the HDCP GSC message interfaceJani Nikula
The opaque HDCP GSC context nicely abstracts the differences between drivers. Pass that instead of struct drm_i915_private or struct xe_device to intel_hdcp_gsc_msg_send(). We can store the driver specific data in the context. This lets us drop the dependency on i915_drv.h from intel_hdcp_gsc_message.c. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/df1653212f9014e717701b017e78e0017884b870.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: rename HDCP GSC context alloc/free functionsJani Nikula
Name the functions intel_hdcp_gsc_context_alloc() and intel_hdcp_gsc_context_free() for consistency. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/c6e25686ed20b5fdea9a59faf6a64a7312a075b0.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: rename struct intel_hdcp_gsc_message to intel_hdcp_gsc_contextJani Nikula
It's really about the context more than about the message. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/ca0a802a81ba4e96e7c40646a32386d4351d6ff4.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: split HDCP GSC message alloc/save responsibilitiesJani Nikula
Allocate and initialize the HDCP GSC message in intel_hdcp_gsc_hdcp2_init() as before, but store the pointer to display->hdcp.hdcp_message in the caller. Similarly, pass in the pointer to intel_hdcp_gsc_free_message(). Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/a74fcc941126bf92d12115b5faf4f75099e26242.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2025-05-02drm/i915/hdcp: deduplicate and refactor HDCP GSC ops initializationJani Nikula
The gsc_hdcp_ops is duplicated and initialized exactly the same way in two different places (for i915 and xe), and requires forward declarations for all the hooks. Deduplicate, and make the functions static. There are slight differences in the i915 and xe implementations of intel_hdcp_gsc_init() and intel_hdcp_gsc_fini(). Take the best of both, and improve. We need to expose intel_hdcp_gsc_hdcp2_init() and intel_hdcp_gsc_free_message() for this, and create the latter for xe. Cc: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Link: https://lore.kernel.org/r/21e7871b35d4c7d13f016b5ecb4f10e5be72c531.1745524803.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2024-09-12drm/i915/hdcp: Use intel_display in hdcp_gscSuraj Kandpal
Use intel_display structure instead of drm_i915_private wherever possible in hdcp_gsc related files. --v2 -make intel_hdcp_gsc_hdcp2_init accept intel_display [Jani] Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240911090540.643155-3-suraj.kandpal@intel.com
2024-09-12drm/i915/hdcp: Move to using intel_display in intel_hdcpSuraj Kandpal
Move to using intel_display wherever possible in intel_hdcp.c as a part of code refactor. --v2 -Move intel_display to the first line wherever possible [Jani] -use the closest reference when using to_intel_display [Jani] Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240911090540.643155-2-suraj.kandpal@intel.com
2024-03-06drm/i915/hdcp: Move intel_hdcp_gsc_message def away from header fileSuraj Kandpal
Move intel_hdcp_gsc_message definition into intel_hdcp_gsc.c so that intel_hdcp_gsc_message can be redefined for xe as needed. --v2 -Correct commit message to reflect what patch is actually doing [Arun] Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Mika Kahola <mika.kahola@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240306024741.1858039-2-suraj.kandpal@intel.com
2023-10-12drm/i915/hdcp: Move checks for gsc health statusSuraj Kandpal
Move checks for gsc components required for HDCP 2.2 to work into intel_hdcp_gsc.c. This will also help with XE refactor on HDCP's side. Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Uma Shankar <uma.shankar@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20231009095537.653619-2-suraj.kandpal@intel.com
2023-06-14drm/i915/hdcp: Modify hdcp_gsc_message msg sending mechanismSuraj Kandpal
Allocate a multipage object that can be used for input and output for intel_hdcp_gsc_message so that corruption of output message can be avoided by the current overwriting method. Modify intel_gsc_send_sync() to take into account header_out and addr_out so as to use them to verify the message send status. Check link for comment and review history https://patchwork.freedesktop.org/series/118499/ --v2 -Change approach from allocating two objects to just one multipage object [Daniele] --v3 -Squash the two patches together [Daniele] -No need to allocate twice the size of intel_hdcp_gsc_message [Daniele] Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Cc: Alan Previn <alan.previn.teres.alexis@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230602105113.1791104-1-suraj.kandpal@intel.com
2023-03-23drm/i915/mtl: Add HDCP GSC interfaceSuraj Kandpal
MTL uses GSC command streamer i.e gsc cs to send HDCP/PXP commands to GSC f/w. It requires to keep hdcp display driver agnostic to content protection f/w (ME/GSC fw) in the form of i915_hdcp_fw_ops generic ops. Adding HDCP GSC CS interface by leveraging the i915_hdcp_fw_ops generic ops instead of I915_HDCP_COMPONENT as integral part of i915. Adding checks to see if GSC is loaded and proxy is setup --v6 -dont change the license date in same patch series [Jani] -fix the license year {Jani] --v8 -remove stale comment [Ankit] -get headers in alphabetical order [Ankit] -fix hdcp2_supported check [Ankit] --v9 -remove return statement from hdcp_gsc_fini [Ankit] Cc: Tomas Winkler <tomas.winkler@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Uma Shankar <uma.shankar@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230316092927.668980-7-suraj.kandpal@intel.com
2023-03-23drm/i915/mtl: Add function to send command to GSC CSSuraj Kandpal
Add function that takes care of sending command to gsc cs. We start of with allocation of memory for our command intel_hdcp_gsc_message that contains gsc cs memory header as directed in specs followed by the actual payload hdcp message that we want to send. Spec states that we need to poll pending bit of response header around 20 times each try being 50ms apart hence adding that to current gsc_msg_send function Also we use the same function to take care of both sending and receiving hence no separate function to get the response. --v4 -Create common function to fill in gsc_mtl_header [Alan] -define host session bitmask [Alan] --v5 -use i915 directly instead of gt->i915 [Alan] -No need to make fields NULL as we are already using kzalloc [Alan] --v8 -change mechanism to reuse the same memory for one hdcp session[Alan] -fix header ordering -add comments to explain flags and host session mask [Alan] --v9 -remove gem obj from hdcp message as we can use i915_vma_unpin_and_release [Alan] -move hdcp message allocation and deallocation from hdcp2_enable and hdcp2_disable to init and teardown of HDCP [Alan] --v10 -remove unnecessary i915_vma_unpin [Alan] --v11 -fix comment style [Uma] Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Alan Pervin Teres <alan.previn.teres.alexis@intel.com> Cc: Uma Shankar <uma.shankar@intel.com> Cc: Anshuman Gupta <anshuman.gupta@intel.com> Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Signed-off-by: Uma Shankar <uma.shankar@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230316092927.668980-6-suraj.kandpal@intel.com