From: "C, Ramalingam" <ramalingam.c@intel.com>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: daniel.vetter@ffwll.ch, intel-gfx@lists.freedesktop.org,
dri-devel@lists.freedesktop.org, seanpaul@chromium.org,
tomas.winkler@intel.com
Subject: Re: [PATCH v9 10/39] drm/i915: Implement HDCP2.2 receiver authentication
Date: Wed, 19 Dec 2018 21:18:20 +0530 [thread overview]
Message-ID: <7ed9278c-2e4b-3d3e-45ef-65c13c18d68f@intel.com> (raw)
In-Reply-To: <20181219153519.GN21184@phenom.ffwll.local>
[-- Attachment #1.1: Type: text/plain, Size: 1621 bytes --]
On 12/19/2018 9:05 PM, Daniel Vetter wrote:
> On Wed, Dec 19, 2018 at 08:35:48PM +0530, C, Ramalingam wrote:
>> On 12/19/2018 8:05 PM, Daniel Vetter wrote:
>>> On Thu, Dec 13, 2018 at 09:31:12AM +0530, Ramalingam C wrote:
>>>> + if (!hdcp->is_repeater && shim->config_stream_type) {
>>>> + /*
>>>> + * Errata for DP: As Stream type is used for encryption,
>>>> + * Receiver should be communicated with stream type for the
>>>> + * decryption of the content.
>>>> + * Repeater will be communicated with stream type as a
>>>> + * part of it's auth later in time.
>>>> + */
>>> I'm not following what you want to say with this comment, and haven't
>>> found anything in the hdcp2 dp spec about this either.
>> this is there in the errata of DP HDCP2.2 spec.
>> hdcp2.2 encryption algo involves the stream type as a parameter.
>> And as part of hdcp auth mentioned in base spec DP repeaters receive that details to decrypt the content.
>> But DP receivers dont get it. So errata adds the missing piece for decryption.
> Ok I found it, but the fake HDCP_2_2_ERRATA_DP_STREAM_TYPE define is kinda
> annoying. It doesn't exist in the spec, but we put it into the drm_hdcp.h
> header. Since you have a special ->config_stream_type hook for this
> anyway, and it's only needed for DP, please move that into the shim
> implementation.
>
> And then a follow-up patch to remove the fake #define from drm_hdcp.h.
This is defined to make the hdcp_shim interface to look common between DP and HDMI.
We can move this errata msg definition and its msg_id into intel_drv.h just for the intel's consumption.
-Ram
> -Daniel
[-- Attachment #1.2: Type: text/html, Size: 2581 bytes --]
[-- Attachment #2: Type: text/plain, Size: 160 bytes --]
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next prev parent reply other threads:[~2018-12-19 15:48 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-13 4:01 [PATCH v9 00/39] drm/i915: Implement HDCP2.2 Ramalingam C
2018-12-13 4:01 ` [PATCH v9 01/39] drm/i915: Gathering the HDCP1.4 routines together Ramalingam C
2018-12-13 8:17 ` Winkler, Tomas
2018-12-13 11:21 ` C, Ramalingam
2018-12-19 13:35 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 02/39] drm: header for i915 - MEI_HDCP interface Ramalingam C
2018-12-17 11:28 ` Winkler, Tomas
2018-12-17 13:27 ` Daniel Vetter
2018-12-17 13:42 ` Winkler, Tomas
2018-12-17 13:59 ` Daniel Vetter
2018-12-19 13:37 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 03/39] drivers/base: use a worker for sysfs unbind Ramalingam C
2018-12-19 13:38 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 04/39] component: alloc component_match without any comp to match Ramalingam C
2018-12-19 13:42 ` Daniel Vetter
2018-12-19 15:04 ` Greg Kroah-Hartman
2018-12-13 4:01 ` [PATCH v9 05/39] drm/i915: component master at i915 driver load Ramalingam C
2018-12-19 13:45 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 06/39] drm/i915: Initialize HDCP2.2 Ramalingam C
2018-12-19 13:45 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 07/39] drm/i915: MEI interface definition Ramalingam C
2018-12-19 14:00 ` Daniel Vetter
2018-12-19 15:15 ` C, Ramalingam
2018-12-19 15:21 ` Daniel Vetter
2018-12-20 13:18 ` C, Ramalingam
2018-12-20 14:47 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 08/39] drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking Ramalingam C
2018-12-19 15:48 ` Daniel Vetter
2018-12-20 11:29 ` C, Ramalingam
2018-12-20 14:53 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 09/39] drm/i915: Enable and Disable of HDCP2.2 Ramalingam C
2018-12-19 15:54 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 10/39] drm/i915: Implement HDCP2.2 receiver authentication Ramalingam C
2018-12-19 14:35 ` Daniel Vetter
2018-12-19 15:05 ` C, Ramalingam
2018-12-19 15:35 ` Daniel Vetter
2018-12-19 15:48 ` C, Ramalingam [this message]
2018-12-19 18:40 ` Jani Nikula
2018-12-19 21:36 ` Winkler, Tomas
2018-12-20 7:42 ` Jani Nikula
2018-12-20 14:28 ` Winkler, Tomas
2018-12-20 14:55 ` Daniel Vetter
2018-12-21 18:06 ` Ville Syrjälä
2018-12-13 4:01 ` [PATCH v9 11/39] drm: helper functions for hdcp2 seq_num to from u32 Ramalingam C
2018-12-19 14:38 ` Daniel Vetter
2018-12-13 4:01 ` [PATCH v9 12/39] drm/i915: Implement HDCP2.2 repeater authentication Ramalingam C
2018-12-13 8:22 ` Winkler, Tomas
2018-12-13 11:18 ` C, Ramalingam
2018-12-19 14:48 ` Daniel Vetter
2018-12-19 15:35 ` C, Ramalingam
2018-12-13 4:01 ` [PATCH v9 13/39] drm: HDCP2.2 link check related constants Ramalingam C
2018-12-19 15:16 ` Daniel Vetter
2018-12-19 15:39 ` C, Ramalingam
2018-12-19 15:58 ` Daniel Vetter
2018-12-19 16:22 ` C, Ramalingam
2018-12-19 16:35 ` Daniel Vetter
2018-12-19 17:01 ` C, Ramalingam
2018-12-13 4:01 ` [PATCH v9 14/39] drm/i915: Implement HDCP2.2 link integrity check Ramalingam C
2018-12-13 4:01 ` [PATCH v9 15/39] drm/i915: Handle HDCP2.2 downstream topology change Ramalingam C
2018-12-13 4:01 ` [PATCH v9 16/39] drm/i915: Implement the HDCP2.2 support for DP Ramalingam C
2018-12-13 4:01 ` [PATCH v9 17/39] drm/i915: Implement the HDCP2.2 support for HDMI Ramalingam C
2018-12-13 4:01 ` [PATCH v9 18/39] drm/i915: Add HDCP2.2 support for DP connectors Ramalingam C
2018-12-13 4:01 ` [PATCH v9 19/39] drm/i915: Add HDCP2.2 support for HDMI connectors Ramalingam C
2018-12-13 4:01 ` [PATCH v9 20/39] mei: bus: whitelist hdcp client Ramalingam C
2018-12-13 4:01 ` [PATCH v9 21/39] mei: bus: export to_mei_cl_device for mei client device drivers Ramalingam C
2018-12-13 4:01 ` [PATCH v9 22/39] misc/mei/hdcp: Client driver for HDCP application Ramalingam C
2018-12-13 4:01 ` [PATCH v9 23/39] misc/mei/hdcp: Define ME FW interface for HDCP2.2 Ramalingam C
2018-12-13 4:01 ` [PATCH v9 24/39] misc/mei/hdcp: Initiate Wired HDCP2.2 Tx Session Ramalingam C
2018-12-13 4:01 ` [PATCH v9 25/39] misc/mei/hdcp: Verify Receiver Cert and prepare km Ramalingam C
2018-12-13 4:01 ` [PATCH v9 26/39] misc/mei/hdcp: Verify H_prime Ramalingam C
2018-12-13 4:01 ` [PATCH v9 27/39] misc/mei/hdcp: Store the HDCP Pairing info Ramalingam C
2018-12-13 4:01 ` [PATCH v9 28/39] misc/mei/hdcp: Initiate Locality check Ramalingam C
2018-12-13 4:01 ` [PATCH v9 29/39] misc/mei/hdcp: Verify L_prime Ramalingam C
2018-12-13 4:01 ` [PATCH v9 30/39] misc/mei/hdcp: Prepare Session Key Ramalingam C
2018-12-13 4:01 ` [PATCH v9 31/39] misc/mei/hdcp: Repeater topology verification and ack Ramalingam C
2018-12-13 4:01 ` [PATCH v9 32/39] misc/mei/hdcp: Verify M_prime Ramalingam C
2018-12-13 4:01 ` [PATCH v9 33/39] misc/mei/hdcp: Enabling the HDCP authentication Ramalingam C
2018-12-13 4:01 ` [PATCH v9 34/39] misc/mei/hdcp: Closing wired HDCP2.2 Tx Session Ramalingam C
2018-12-13 4:01 ` [PATCH v9 35/39] misc/mei/hdcp: Component framework for I915 Interface Ramalingam C
2018-12-13 12:36 ` C, Ramalingam
2018-12-13 16:11 ` Daniel Vetter
2018-12-13 16:27 ` Winkler, Tomas
2018-12-13 17:35 ` Daniel Vetter
2018-12-15 21:20 ` Winkler, Tomas
2018-12-17 9:39 ` Daniel Vetter
2018-12-17 9:59 ` Daniel Vetter
2018-12-17 10:57 ` Winkler, Tomas
2018-12-17 13:46 ` Daniel Vetter
2018-12-19 6:45 ` C, Ramalingam
2018-12-20 15:59 ` C, Ramalingam
2018-12-20 16:06 ` Winkler, Tomas
2018-12-20 16:47 ` C, Ramalingam
2018-12-13 4:01 ` [PATCH v9 36/39] drm/i915: Commit CP without modeset Ramalingam C
2018-12-13 4:01 ` [PATCH v9 37/39] drm/i915: Fix KBL HDCP2.2 encrypt status signalling Ramalingam C
2018-12-19 15:40 ` Daniel Vetter
2018-12-19 16:16 ` C, Ramalingam
2018-12-13 4:01 ` [PATCH v9 38/39] FOR_TEST: i915/Kconfig: Select mei_hdcp by I915 Ramalingam C
2018-12-13 4:01 ` [PATCH v9 39/39] FOR_TESTING_ONLY: debugfs: Excluding the LSPCon for HDCP1.4 Ramalingam C
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7ed9278c-2e4b-3d3e-45ef-65c13c18d68f@intel.com \
--to=ramalingam.c@intel.com \
--cc=daniel.vetter@ffwll.ch \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=intel-gfx@lists.freedesktop.org \
--cc=seanpaul@chromium.org \
--cc=tomas.winkler@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox