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authorWenjing Liu <wenjing.liu@amd.com>2021-05-17 21:54:19 +0200
committerAlex Deucher <alexander.deucher@amd.com>2021-06-08 18:15:54 +0200
commit416b4e7596fa8cbe47f94f53009e252acfd36ece (patch)
tree4550ee21d620fb96a23fa7f0757a056e0bdbf9a0 /drivers
parentdrm/amd/display: Enabling PSR support for multiple panels (diff)
downloadlinux-416b4e7596fa8cbe47f94f53009e252acfd36ece.tar.xz
linux-416b4e7596fa8cbe47f94f53009e252acfd36ece.zip
drm/amd/display: delay 100ms before restart after failing to read CP_IRQ
[why] Some DPRX will issue CP_IRQ when user disconnects a display that has been authenticated. Since display is being disconnecting dpcd read will fail. This will cause us to attempt HDCP retry on disconnection. We are adding a 100ms delay before retry. So we will only start retry if within 100ms there is no disconnection call to HDCP module. Signed-off-by: Wenjing Liu <wenjing.liu@amd.com> Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com> Acked-by: Stylon Wang <stylon.wang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
index b0306ed6d6b4..70cb230d8f56 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp2_transition.c
@@ -564,7 +564,7 @@ enum mod_hdcp_status mod_hdcp_hdcp2_dp_transition(struct mod_hdcp *hdcp,
case D2_A5_AUTHENTICATED:
if (input->rxstatus_read == FAIL ||
input->reauth_request_check == FAIL) {
- fail_and_restart_in_ms(0, &status, output);
+ fail_and_restart_in_ms(100, &status, output);
break;
} else if (input->link_integrity_check_dp == FAIL) {
if (hdcp->connection.hdcp2_retry_count >= 1)