Commit b8e47d87 authored Apr 05, 2018 by Ramalingam C Committed by Sean Paul Apr 16, 2018

drm: Fix HDCP downstream dev count read



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: 495eb7f8 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

parent 8089f9f5

include/drm/drm_hdcp.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -19,7 +19,7 @@
		#define DRM_HDCP_RI_LEN 2
		#define DRM_HDCP_V_PRIME_PART_LEN 4
		#define DRM_HDCP_V_PRIME_NUM_PARTS 5
		#define DRM_HDCP_NUM_DOWNSTREAM(x) (x & 0x3f)
		#define DRM_HDCP_NUM_DOWNSTREAM(x) (x & 0x7f)
		#define DRM_HDCP_MAX_CASCADE_EXCEEDED(x) (x & BIT(3))
		#define DRM_HDCP_MAX_DEVICE_EXCEEDED(x) (x & BIT(7))

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