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charset="utf-8" When user enabled HDCP feature, upper layer will set HDCP content to DRM_MODE_CONTENT_PROTECTION_DESIRED. Next, anx7625 will update HDCP content to DRM_MODE_CONTENT_PROTECTION_ENABLED if down stream support HDCP feature. However once HDCP content turn to DRM_MODE_CONTENT_PROTECTION_ENABLED upper layer will not update the HDCP content to DRM_MODE_CONTENT_PROTECTION_UNDESIRED until monitor disconnect. So when user dynamic change the display resolution, anx7625 driver must call drm_hdcp_update_content_protection() to update HDCP content to DRM_MODE_CONTENT_PROTECTION_UNDESIRED in bridge interface .atomic_disable(). Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 25 ++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/br= idge/analogix/anx7625.c index a2675b121fe4..a75f519ddcb8 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -861,6 +861,22 @@ static int anx7625_hdcp_disable(struct anx7625_data *c= tx) TX_HDCP_CTRL0, ~HARD_AUTH_EN & 0xFF); } =20 +static void anx7625_hdcp_disable_and_update_cp(struct anx7625_data *ctx) +{ + struct device *dev =3D ctx->dev; + + if (!ctx->connector) + return; + + anx7625_hdcp_disable(ctx); + + ctx->hdcp_cp =3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED; + drm_hdcp_update_content_protection(ctx->connector, + ctx->hdcp_cp); + + dev_dbg(dev, "update CP to UNDESIRE\n"); +} + static int anx7625_hdcp_enable(struct anx7625_data *ctx) { u8 bcap; @@ -2165,11 +2181,8 @@ static int anx7625_connector_atomic_check(struct anx= 7625_data *ctx, dev_err(dev, "current CP is not ENABLED\n"); return -EINVAL; } - anx7625_hdcp_disable(ctx); - ctx->hdcp_cp =3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED; - drm_hdcp_update_content_protection(ctx->connector, - ctx->hdcp_cp); - dev_dbg(dev, "update CP to UNDESIRE\n"); + + anx7625_hdcp_disable_and_update_cp(ctx); } =20 if (cp =3D=3D DRM_MODE_CONTENT_PROTECTION_ENABLED) { @@ -2449,6 +2462,8 @@ static void anx7625_bridge_atomic_disable(struct drm_= bridge *bridge, =20 dev_dbg(dev, "drm atomic disable\n"); =20 + anx7625_hdcp_disable_and_update_cp(ctx); + ctx->connector =3D NULL; anx7625_dp_stop(ctx); =20 --=20 2.25.1