diff mbox series

[v2,2/5] drm/hdcp: fix DRM_HDCP_2_KSV_COUNT_2_LSBITS

Message ID 20200212102942.26568-3-ramalingam.c@intel.com (mailing list archive)
State New, archived
Headers show
Series HDCP misc | expand

Commit Message

Ramalingam C Feb. 12, 2020, 10:29 a.m. UTC 
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>
---
 include/drm/drm_hdcp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Gupta, Anshuman Feb. 13, 2020, 11:37 a.m. UTC | #1 
On 2020-02-12 at 15:59:39 +0530, Ramalingam C wrote:
> 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>
> ---
>  include/drm/drm_hdcp.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
> index d512089b873f..c6bab4986a65 100644
> --- a/include/drm/drm_hdcp.h
> +++ b/include/drm/drm_hdcp.h
> @@ -276,7 +276,7 @@ void drm_hdcp_cpu_to_be24(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
>  #define DRM_HDCP_2_VRL_LENGTH_SIZE		3
>  #define DRM_HDCP_2_DCP_SIG_SIZE			384
>  #define DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ	4
> -#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte)	(((byte) & 0xC) >> 6)
> +#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte)	(((byte) & 0xC0) >> 6)
LGTM, verified wrt Table 5.1 HDCP HDMI specs page 64.
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com> 
>  
>  struct hdcp_srm_header {
>  	u8 srm_id;
> -- 
> 2.20.1
> 
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> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff mbox series

Patch

diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index d512089b873f..c6bab4986a65 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -276,7 +276,7 @@  void drm_hdcp_cpu_to_be24(u8 seq_num[HDCP_2_2_SEQ_NUM_LEN], u32 val)
 #define DRM_HDCP_2_VRL_LENGTH_SIZE		3
 #define DRM_HDCP_2_DCP_SIG_SIZE			384
 #define DRM_HDCP_2_NO_OF_DEV_PLUS_RESERVED_SZ	4
-#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte)	(((byte) & 0xC) >> 6)
+#define DRM_HDCP_2_KSV_COUNT_2_LSBITS(byte)	(((byte) & 0xC0) >> 6)
 
 struct hdcp_srm_header {
 	u8 srm_id;