media: venus: Remove unused hfi_core_ping()

hfi_core_ping() was added by 2017's
commit 09c2845 ("[media] media: venus: hfi: add Host Firmware
Interface (HFI)")

but has remained unused.

Remove it.

It was the only caller of the ->core_ping member of hfi_ops,
so remove it, and the venus_core_ping that it pointed to.

Note I've left pky_sys_ping which seems to be the lowest level
definition of the command.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

Author: Dr. David Alan Gilbert

drivers/media/platform/qcom/venus/hfi.c

@@ -138,29 +138,6 @@ int hfi_core_trigger_ssr(struct venus_core *core, u32 type)
 	return core->ops->core_trigger_ssr(core, type);
 }
 
-int hfi_core_ping(struct venus_core *core)
-{
-	int ret;
-
-	mutex_lock(&core->lock);
-
-	ret = core->ops->core_ping(core, 0xbeef);
-	if (ret)
-		goto unlock;
-
-	ret = wait_for_completion_timeout(&core->done, TIMEOUT);
-	if (!ret) {
-		ret = -ETIMEDOUT;
-		goto unlock;
-	}
-	ret = 0;
-	if (core->error != HFI_ERR_NONE)
-		ret = -ENODEV;
-unlock:
-	mutex_unlock(&core->lock);
-	return ret;
-}
-
 static int wait_session_msg(struct venus_inst *inst)
 {
 	int ret;

drivers/media/platform/qcom/venus/hfi.h

@@ -108,7 +108,6 @@ struct hfi_inst_ops {
 struct hfi_ops {
 	int (*core_init)(struct venus_core *core);
 	int (*core_deinit)(struct venus_core *core);
-	int (*core_ping)(struct venus_core *core, u32 cookie);
 	int (*core_trigger_ssr)(struct venus_core *core, u32 trigger_type);
 
 	int (*session_init)(struct venus_inst *inst, u32 session_type,
@@ -152,7 +151,6 @@ int hfi_core_deinit(struct venus_core *core, bool blocking);
 int hfi_core_suspend(struct venus_core *core);
 int hfi_core_resume(struct venus_core *core, bool force);
 int hfi_core_trigger_ssr(struct venus_core *core, u32 type);
-int hfi_core_ping(struct venus_core *core);
 int hfi_session_create(struct venus_inst *inst, const struct hfi_inst_ops *ops);
 void hfi_session_destroy(struct venus_inst *inst);
 int hfi_session_init(struct venus_inst *inst, u32 pixfmt);

drivers/media/platform/qcom/venus/hfi_venus.c

@@ -1178,16 +1178,6 @@ static int venus_core_deinit(struct venus_core *core)
 	return 0;
 }
 
-static int venus_core_ping(struct venus_core *core, u32 cookie)
-{
-	struct venus_hfi_device *hdev = to_hfi_priv(core);
-	struct hfi_sys_ping_pkt pkt;
-
-	pkt_sys_ping(&pkt, cookie);
-
-	return venus_iface_cmdq_write(hdev, &pkt, false);
-}
-
 static int venus_core_trigger_ssr(struct venus_core *core, u32 trigger_type)
 {
 	struct venus_hfi_device *hdev = to_hfi_priv(core);
@@ -1639,7 +1629,6 @@ static int venus_suspend(struct venus_core *core)
 static const struct hfi_ops venus_hfi_ops = {
 	.core_init			= venus_core_init,
 	.core_deinit			= venus_core_deinit,
-	.core_ping			= venus_core_ping,
 	.core_trigger_ssr		= venus_core_trigger_ssr,
 
 	.session_init			= venus_session_init,