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2021-03-31drm/hdcp: DP HDCP2.2 errata LC_Send_L_Prime=16Anshuman Gupta1-1/+1
Fix LC_Send_L_Prime message timeout to 16 as documented in DP HDCP 2.2 errata page 3. https://www.digital-cp.com/sites/default/files/HDCP%202_2_DisplayPort_Errata_v3_0.pdf Cc: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Acked-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210324113012.7564-3-anshuman.gupta@intel.com
2021-03-31drm/i915/hdcp: Add DP HDCP2.2 timeout to read entire msgAnshuman Gupta1-0/+3
As documented in HDCP 2.2 DP Errata spec transmitter should abort the authentication protocol in case transmitter has not received the entire {AKE_Send_Cert, AKE_Send_H_prime, AKE_Send_Paring_Info} msg within {110,7,5} miliseconds. Adding above msg timeout values and aborting the HDCP authentication in case it timedout to read entire msg. https://www.digital-cp.com/sites/default/files/HDCP%202_2_DisplayPort_Errata_v3_0.pdf v2: - Removed redundant variable msg_can_timedout. [Ankit] Cc: Ramalingam C <ramalingam.c@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com> Acked-by: Maxime Ripard <mripard@kernel.org> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210324113012.7564-2-anshuman.gupta@intel.com
2021-01-13drm/hdcp: Max MST content streamsAnshuman Gupta1-4/+4
Let's define Maximum MST content streams up to four generically which can be supported by modern display controllers. Cc: Sean Paul <seanpaul@chromium.org> Cc: Ramalingam C <ramalingam.c@intel.com> Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Reviewed-by: Ramalingam C <ramalingam.c@intel.com> Tested-by: Karthik B S <karthik.b.s@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210111081120.28417-14-anshuman.gupta@intel.com
2020-09-01drm/i915: Fix sha_text population codeSean Paul1-0/+3
This patch fixes a few bugs: 1- We weren't taking into account sha_leftovers when adding multiple ksvs to sha_text. As such, we were or'ing the end of ksv[j - 1] with the beginning of ksv[j] 2- In the sha_leftovers == 2 and sha_leftovers == 3 case, bstatus was being placed on the wrong half of sha_text, overlapping the leftover ksv value 3- In the sha_leftovers == 2 case, we need to manually terminate the byte stream with 0x80 since the hardware doesn't have enough room to add it after writing M0 The upside is that all of the HDCP supported HDMI repeaters I could find on Amazon just strip HDCP anyways, so it turns out to be _really_ hard to hit any of these cases without an MST hub, which is not (yet) supported. Oh, and the sha_leftovers == 1 case works perfectly! Fixes: ee5e5e7a5e0f ("drm/i915: Add HDCP framework + base implementation") Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Ramalingam C <ramalingam.c@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Sean Paul <seanpaul@chromium.org> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: intel-gfx@lists.freedesktop.org Cc: <stable@vger.kernel.org> # v4.17+ Reviewed-by: Ramalingam C <ramalingam.c@intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20191203173638.94919-2-sean@poorly.run #v1 Link: https://patchwork.freedesktop.org/patch/msgid/20191212190230.188505-2-sean@poorly.run #v2 Link: https://patchwork.freedesktop.org/patch/msgid/20200117193103.156821-2-sean@poorly.run #v3 Link: https://patchwork.freedesktop.org/patch/msgid/20200218220242.107265-2-sean@poorly.run #v4 Link: https://patchwork.freedesktop.org/patch/msgid/20200305201236.152307-2-sean@poorly.run #v5 Link: https://patchwork.freedesktop.org/patch/msgid/20200429195502.39919-2-sean@poorly.run #v6 Link: https://patchwork.freedesktop.org/patch/msgid/20200623155907.22961-2-sean@poorly.run #v7 Changes in v2: -None Changes in v3: -None Changes in v4: -Rebased on intel_de_write changes Changes in v5: -None Changes in v6: -None Changes in v7: -None Changes in v8: -None Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200818153910.27894-2-sean@poorly.run
2020-03-04drm/hdcp: fix DRM_HDCP_2_KSV_COUNT_2_LSBITSRamalingam C1-1/+1
Need to extract the 2 most significant bits from a byte for constructing the revoked KSV count of the SRM. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200212102942.26568-3-ramalingam.c@intel.com
2020-03-04drm/hdcp: optimizing the srm handlingRamalingam C1-2/+2
As we are not using the sysfs infrastructure anymore, link to it is removed. And global srm data and mutex to protect it are removed, with required handling at revocation check function. v2: srm_data is dropped and few more comments are addressed. v3: ptr passing around is fixed with functional testing. v4: fix htmldoc [lkp] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Suggested-by: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <sean@poorly.run> Link: https://patchwork.freedesktop.org/patch/msgid/20200212102942.26568-2-ramalingam.c@intel.com
2019-08-06drm/hdcp: update content protection property with ueventRamalingam C1-0/+2
drm function is defined and exported to update a connector's content protection property state and to generate a uevent along with it. Pekka have completed the Weston DRM-backend review in https://gitlab.freedesktop.org/wayland/weston/merge_requests/48 and the UAPI for HDCP 2.2 looks good. The userspace is accepted in Weston. v2: Update only when state is different from old one. v3: KDoc is added [Daniel] v4: KDoc is extended bit more [pekka] v5: Uevent usage is documented at kdoc of "Content Protection" also [pekka] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/320963/?series=57232&rev=14
2019-08-06drm: Add Content protection type propertyRamalingam C1-1/+6
This patch adds a DRM ENUM property to the selected connectors. This property is used for mentioning the protected content's type from userspace to kernel HDCP authentication. Type of the stream is decided by the protected content providers. Type 0 content can be rendered on any HDCP protected display wires. But Type 1 content can be rendered only on HDCP2.2 protected paths. So when a userspace sets this property to Type 1 and starts the HDCP enable, kernel will honour it only if HDCP2.2 authentication is through for type 1. Else HDCP enable will be failed. Pekka have completed the Weston DRM-backend review in https://gitlab.freedesktop.org/wayland/weston/merge_requests/48 and the UAPI for HDCP 2.2 looks good. The userspace is accepted in Weston. v2: cp_content_type is replaced with content_protection_type [daniel] check at atomic_set_property is removed [Maarten] v3: %s/content_protection_type/hdcp_content_type [Pekka] v4: property is created for the first requested connector and then reused. [Danvet] v5: kernel doc nits addressed [Daniel] Rebased as part of patch reordering. v6: Kernel docs are modified [pekka] v7: More details in Kernel docs. [pekka] v8: Few more clarification into kernel doc of content type [pekka] v9: Small fixes in coding style. v10: Moving DRM_MODE_HDCP_CONTENT_TYPEx definition to drm_hdcp.h [pekka] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/320957/?series=57232&rev=14
2019-05-09drm/hdcp: gathering hdcp related code into drm_hdcp.cRamalingam C1-0/+3
Considering the significant size of hdcp related code in drm, all hdcp related codes are moved into separate file called drm_hdcp.c. v2: Rebased. v2: Rebased. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Suggested-by: Daniel Vetter <daniel@ffwll.ch> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190507162745.25600-7-ramalingam.c@intel.com
2019-05-09drm: revocation check at drm subsystemRamalingam C1-0/+24
On every hdcp revocation check request SRM is read from fw file /lib/firmware/display_hdcp_srm.bin SRM table is parsed and stored at drm_hdcp.c, with functions exported for the services for revocation check from drivers (which implements the HDCP authentication) This patch handles the HDCP1.4 and 2.2 versions of SRM table. v2: moved the uAPI to request_firmware_direct() [Daniel] v3: kdoc added. [Daniel] srm_header unified and bit field definitions are removed. [Daniel] locking improved. [Daniel] vrl length violation is fixed. [Daniel] v4: s/__swab16/be16_to_cpu [Daniel] be24_to_cpu is done through a global func [Daniel] Unused variables are removed. [Daniel] unchecked return values are dropped from static funcs [Daniel] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Acked-by: Satyeshwar Singh <satyeshwar.singh@intel.com> Reviewed-by: Daniel Vetter <daniel@ffwll.ch> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190507162745.25600-5-ramalingam.c@intel.com
2019-05-09drm: generic fn converting be24 to cpu and vice versaRamalingam C1-2/+2
Existing functions for converting a 3bytes(be24) of big endian value into u32 of little endian and vice versa are renamed as s/drm_hdcp2_seq_num_to_u32/drm_hdcp_be24_to_cpu s/drm_hdcp2_u32_to_seq_num/drm_hdcp_cpu_to_be24 Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Suggested-by: Daniel Vetter <daniel@ffwll.ch> cc: Tomas Winkler <tomas.winkler@intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190507162745.25600-4-ramalingam.c@intel.com
2019-02-20drm: removing the DP Errata msg and its msg idRamalingam C1-6/+0
Since DP ERRATA message is not defined at spec, those structure definition is removed from drm_hdcp.h Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550338640-17470-13-git-send-email-ramalingam.c@intel.com
2019-02-20drm: HDCP2.2 link check periodRamalingam C1-0/+1
Time period for HDCP2.2 link check. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550338640-17470-10-git-send-email-ramalingam.c@intel.com
2019-02-20Merge tag 'topic/mei-hdcp-2019-02-19' of ↵Joonas Lahtinen1-0/+18
git://anongit.freedesktop.org/drm/drm-intel into drm-intel-next-queued Prep patches + headers for the mei-hdcp/i915 component interfaces Also contains the prep work in the component helpers plus adjustements for the snd-hda/i915 component interface. Plus one small static inline in the drm_hdcp.h header that both i915 and mei_hdcp will need. Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> From: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20190219071619.GA11016@phenom.ffwll.local
2019-02-15drm: helper functions for hdcp2 seq_num to from u32Ramalingam C1-0/+18
Library functions for endianness are aligned for 16/32/64 bits. But hdcp sequence numbers are 24bits(big endian). So for their conversion to and from u32 helper functions are developed. v2: Comment is updated. [Daniel] Reviewed-by Uma. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1550219730-17734-10-git-send-email-ramalingam.c@intel.com
2019-01-02drm: include types.h from drm_hdcp.hJani Nikula1-0/+2
drm_hdcp.h uses kernel integer types, make it self-contained by including linux/kernel.h. This prepares for dropping drmP.h from files including drm_hdcp.h. [Updated commit message per Laurent's review while applying.] Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/adfc79941e827b49eb6186f317cbeff0fb365f33.1545915059.git.jani.nikula@intel.com
2018-10-29drm: HDMI and DP specific HDCP2.2 definesRamalingam C1-0/+28
This patch adds HDCP register definitions for HDMI and DP HDCP adaptations. HDMI specific HDCP2.2 register definitions are added into drm_hdcp.h, where as HDCP2.2 register offsets in DPCD offsets are defined at drm_dp_helper.h. v2: bit_field definitions are replaced by macros. [Tomas and Jani] v3: No Changes. v4: Comments style and typos are fixed [Uma] v5: Fix for macros. v6: Adds _MS to the timeouts to represent units [Sean Paul] v7: Macro DP_HDCP_2_2_REG_EKH_KM_OFFSET renamed [Uma] Redundant macro is removed [Uma] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Acked-by: Sean Paul <seanpaul@chromium.org> (for merging through drm-intel) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1540806351-7137-6-git-send-email-ramalingam.c@intel.com
2018-10-29drm: hdcp2.2 authentication msg definitionsRamalingam C1-0/+184
This patch defines the hdcp2.2 protocol messages for authentication. v2: bit_fields are removed. Instead bitmasking used. [Tomas and Jani] prefix HDCP_2_2_ is added to the macros. [Tomas] v3: No Changes. v4: Style and spellings are fixed [Uma] v5: Fix for macros. v6: comment for Type is improved [Sean Paul] v7: %s/HDCP_2_2_LPRIME_HALF_LEN/HDCP_2_2_V_PRIME_HALF_LEN [Uma] %s/uintxx_t/uxx v8: %s/eceiver_id/receiver_id Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Reviewed-by: Uma Shankar <uma.shankar@intel.com> Acked-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/1540806351-7137-5-git-send-email-ramalingam.c@intel.com
2018-04-16drm: Fix HDCP downstream dev count readRamalingam C1-1/+1
In both HDMI and DP, device count is represented by 6:0 bits of a register(BInfo/Bstatus) So macro for bitmasking the device_count is fixed(0x3F->0x7F). v3: Retained the Rb-ed. v4: %s/drm\/i915/drm [rodrigo] v5: Added "Fixes:" and HDCP keyword in subject [Rodrigo, Sean Paul] Signed-off-by: Ramalingam C <ramalingam.c@intel.com> Fixes: 495eb7f877ab drm: Add some HDCP related #defines cc: Sean Paul <seanpaul@chromium.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/1522929802-22850-1-git-send-email-ramalingam.c@intel.com
2018-01-19drm/i915: Check for downstream topology errorsRamalingam C1-0/+2
HDCP compliant Repeaters can support max of 127 devices and max depth of 7 for downstream topology. If these max limits are exceeded, repeater will set the topology error flags MAX_CASCADE_EXCEEDED and/or MAX_DEVS_EXCEEDED in Bstatus followed by asserting READY/CP_IRQ for HDCP transmitter. This patch check for these error flags as soon as READY bit is asserted. Signed-off-by: Ramalingam C <ramalingam.c@intel.com> [seanpaul fixed checkpatch alignment issue] Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/1516254488-4971-5-git-send-email-ramalingam.c@intel.com
2018-01-08drm: Add some HDCP related #definesSean Paul1-0/+39
In preparation for implementing HDCP in i915, add some HDCP related register offsets and defines. The dpcd register offsets will go in drm_dp_helper.h whereas the ddc offsets along with generic HDCP stuff will get stuffed in drm_hdcp.h, which is new. Changes in v2: - drm_hdcp.h gets MIT license (Daniel) Changes in v3: - None Changes in v4: - None Changes in v5: - None Changes in v6: - SPDX license Cc: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Ramalingam C <ramalingm.c@intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20180108195545.218615-5-seanpaul@chromium.org
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