diff options
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c index 2cbd931363bd..43e6f8b17e79 100644 --- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c +++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp1_execution.c @@ -128,6 +128,11 @@ static inline uint8_t get_device_count(struct mod_hdcp *hdcp) static inline enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp) { + /* Avoid device count == 0 to do authentication */ + if (0 == get_device_count(hdcp)) { + return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE; + } + /* Some MST display may choose to report the internal panel as an HDCP RX. * To update this condition with 1(because the immediate repeater's internal * panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c index c1331facdcb4..117c6b45f718 100644 --- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c +++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_execution.c @@ -207,6 +207,11 @@ static inline uint8_t get_device_count(struct mod_hdcp *hdcp) static enum mod_hdcp_status check_device_count(struct mod_hdcp *hdcp) { + /* Avoid device count == 0 to do authentication */ + if (0 == get_device_count(hdcp)) { + return MOD_HDCP_STATUS_HDCP1_DEVICE_COUNT_MISMATCH_FAILURE; + } + /* Some MST display may choose to report the internal panel as an HDCP RX. */ /* To update this condition with 1(because the immediate repeater's internal */ /* panel is possibly not included in DEVICE_COUNT) + get_device_count(hdcp). */ |