diff options
| author | Ramalingam C <ramalingam.c@intel.com> | 2018-01-18 08:48:08 +0300 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2018-01-19 01:56:02 +0300 |
| commit | 49d85d034268ab9d9156ff6f81cc07d4caad03f6 (patch) | |
| tree | 5f5e5ace2fdfd293c5ad30f013fb638d1c56a36c /include/drm/drm_hdcp.h | |
| parent | 24b42cbadb73e0b9ac67c2d619073b394bc146bd (diff) | |
| download | linux-49d85d034268ab9d9156ff6f81cc07d4caad03f6.tar.xz | |
drm/i915: Check for downstream topology errors
HDCP compliant Repeaters can support max of 127 devices and max
depth of 7 for downstream topology.
If these max limits are exceeded, repeater will set the
topology error flags MAX_CASCADE_EXCEEDED and/or MAX_DEVS_EXCEEDED
in Bstatus followed by asserting READY/CP_IRQ for HDCP transmitter.
This patch check for these error flags as soon as READY bit is asserted.
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
[seanpaul fixed checkpatch alignment issue]
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1516254488-4971-5-git-send-email-ramalingam.c@intel.com
Diffstat (limited to 'include/drm/drm_hdcp.h')
| -rw-r--r-- | include/drm/drm_hdcp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h index 43f7bd902b41..562fa7df2637 100644 --- a/include/drm/drm_hdcp.h +++ b/include/drm/drm_hdcp.h @@ -20,6 +20,8 @@ #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_MAX_CASCADE_EXCEEDED(x) (x & BIT(3)) +#define DRM_HDCP_MAX_DEVICE_EXCEEDED(x) (x & BIT(7)) /* Slave address for the HDCP registers in the receiver */ #define DRM_HDCP_DDC_ADDR 0x3A |