linux-kernel - [PATCH] ACPI: CPPC: Support PCC with interrupt flag

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Message-Id: <1469135265-27048-1-git-send-email-hotran@apm.com>
Date:	Thu, 21 Jul 2016 14:07:45 -0700
From:	Hoan Tran <hotran@....com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>, pprakash@...eaurora.org,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	lho@....com, Duc Dang <dhdang@....com>, Hoan Tran <hotran@....com>
Subject: [PATCH] ACPI: CPPC: Support PCC with interrupt flag

For PCC mailbox with interrupt flag, CPPC should call mbox_chan_txdone()
function to notify the mailbox framework about TX completion.

Signed-off-by: Hoan Tran <hotran@....com>
---
This patch is tested on top and depends on patch[1]:
[1] http://www.spinics.net/lists/linux-acpi/msg66041.html
 - [PATCH v3] mailbox: pcc: Support HW-Reduced Communication Subspace type 2

 drivers/acpi/cppc_acpi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 2e98173..19606aa 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -191,7 +191,11 @@ static int send_pcc_cmd(u16 cmd)
 			last_cmd_cmpl_time = ktime_get();
 	}
 
-	mbox_client_txdone(pcc_channel, ret);
+	if (pcc_channel->mbox->txdone_irq)
+		mbox_chan_txdone(pcc_channel, ret);
+	else
+		mbox_client_txdone(pcc_channel, ret);
+
 	return ret;
 }
 
-- 
1.9.1