[PATCH v12 6/6] drm/hdcp: reference for srm file format

[Ramalingam C]

In the kernel documentation, HDCP specifications links are shared as a
reference for SRM table format.

v2:
  Fixed small nits. [Shashank]

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma at intel.com>
Acked-by: Pekka Paalanen <pekka.paalanen at collabora.com>
---
 drivers/gpu/drm/drm_hdcp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c
index 77433ee3d652..9191633a3c43 100644
--- a/drivers/gpu/drm/drm_hdcp.c
+++ b/drivers/gpu/drm/drm_hdcp.c
@@ -271,6 +271,13 @@ static void drm_hdcp_request_srm(struct drm_device *drm_dev)
  *
  * SRM should be presented in the name of "display_hdcp_srm.bin".
  *
+ * Format of the SRM table, that userspace needs to write into the binary file,
+ * is defined at:
+ * 1. Renewability chapter on 55th page of HDCP 1.4 specification
+ * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20Specification%20Rev1_4_Secure.pdf
+ * 2. Renewability chapter on 63rd page of HDCP 2.2 specification
+ * https://www.digital-cp.com/sites/default/files/specifications/HDCP%20on%20HDMI%20Specification%20Rev2_2_Final1.pdf
+ *
  * Returns:
  * TRUE on any of the KSV is revoked, else FALSE.
  */
-- 
2.19.1