[PATCH v4 10/27] venus: hfi_venus: add suspend functionality for Venus 4xx

[Stanimir Varbanov]

This adds suspend (power collapse) functionality by reusing
the suspend function for Venus 3xx and also enables idle indicator
property for Venus 4xx (where it is disabled by default).

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
Reviewed-by: Tomasz Figa <tfiga@xxxxxxxxxxxx>
---
 drivers/media/platform/qcom/venus/hfi_venus.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/hfi_venus.c b/drivers/media/platform/qcom/venus/hfi_venus.c
index 7a83e967a8ea..9366dae16b0a 100644
--- a/drivers/media/platform/qcom/venus/hfi_venus.c
+++ b/drivers/media/platform/qcom/venus/hfi_venus.c
@@ -879,6 +879,14 @@ static int venus_sys_set_default_properties(struct venus_hfi_device *hdev)
 	if (ret)
 		dev_warn(dev, "setting fw debug msg ON failed (%d)\n", ret);
 
+	/*
+	 * Idle indicator is disabled by default on some 4xx firmware versions,
+	 * enable it explicitly in order to make suspend functional by checking
+	 * WFI (wait-for-interrupt) bit.
+	 */
+	if (IS_V4(hdev->core))
+		venus_sys_idle_indicator = true;
+
 	ret = venus_sys_set_idle_message(hdev, venus_sys_idle_indicator);
 	if (ret)
 		dev_warn(dev, "setting idle response ON failed (%d)\n", ret);
@@ -1533,7 +1541,8 @@ static int venus_suspend_3xx(struct venus_core *core)
 
 static int venus_suspend(struct venus_core *core)
 {
-	if (core->res->hfi_version == HFI_VERSION_3XX)
+	if (core->res->hfi_version == HFI_VERSION_3XX ||
+	    core->res->hfi_version == HFI_VERSION_4XX)
 		return venus_suspend_3xx(core);
 
 	return venus_suspend_1xx(core);
-- 
2.14.1