linux-kernel - [PATCH] intel_telemetry_pltdrv: Change verbosity control bits

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Date:	Wed, 17 Feb 2016 12:05:22 +0530
From:	Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>
To:	platform-driver-x86@...r.kernel.org
Cc:	dvhart@...radead.org, linux-kernel@...r.kernel.org,
	Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>
Subject: [PATCH] intel_telemetry_pltdrv: Change verbosity control bits

Due to a recent fix in the firmware, the Punit verbosity control bits
now adhere to the correct pattern. Hence remove the workaround and
do a read-mofiy-write of the register.

Signed-off-by: Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>
---
 drivers/platform/x86/intel_telemetry_pltdrv.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel_telemetry_pltdrv.c b/drivers/platform/x86/intel_telemetry_pltdrv.c
index f97019b..397119f 100644
--- a/drivers/platform/x86/intel_telemetry_pltdrv.c
+++ b/drivers/platform/x86/intel_telemetry_pltdrv.c
@@ -1030,8 +1030,19 @@ static int telemetry_plt_set_trace_verbosity(enum telemetry_unit telem_unit,
 	switch (telem_unit) {
 	case TELEM_PSS:
 		ret = intel_punit_ipc_command(
+				IPC_PUNIT_BIOS_READ_TELE_TRACE_CTRL,
+				0, 0, NULL, &temp);
+		if (ret) {
+			pr_err("PSS TRACE_CTRL Read Failed\n");
+			goto out;
+		}
+
+		TELEM_CLEAR_VERBOSITY_BITS(temp);
+		TELEM_SET_VERBOSITY_BITS(temp, verbosity);
+
+		ret = intel_punit_ipc_command(
 				IPC_PUNIT_BIOS_WRITE_TELE_TRACE_CTRL,
-				0, 0, &verbosity, NULL);
+				0, 0, &temp, NULL);
 		if (ret) {
 			pr_err("PSS TRACE_CTRL Verbosity Set Failed\n");
 			goto out;
-- 
1.7.9.5