drm/i915: hdcp1.4 CP_IRQ handling and SW encryption tracking

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"hdcp_encrypted" flag is defined to denote the HDCP1.4 encryption status.
This SW tracking is used to determine the need for real hdcp1.4 disable
and hdcp_check_link upon CP_IRQ.

On CP_IRQ we filter the CP_IRQ related to the states like Link failure
and reauthentication req etc and handle them in hdcp_check_link.
CP_IRQ corresponding to the authentication msg availability are ignored.

WARN_ON is added for the abrupt stop of HDCP encryption of a port.

v2:
  bool is used in struct for the cleaner coding. [Daniel]
  check_link work_fn is scheduled for cp_irq handling [Daniel]
v3:
  rebased.

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>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1550338640-17470-6-git-send-email-ramalingam.c@intel.com

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Ramalingam C 2019-02-16 23:06:52 +05:30 • committed by Daniel Vetter

parent 9055aac765

commit 09d56393c1

3 changed files with 58 additions and 22 deletions

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2

drivers/gpu/drm/i915/intel_dp.c

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5

drivers/gpu/drm/i915/intel_drv.h

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73

drivers/gpu/drm/i915/intel_hdcp.c

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