linux-kernel - [PATCH 3/5] media: iris: Add IRIS_BSE_HW_CLK handling in power on/off sequence

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Message-Id: <20260209-enable_iris_on_purwa-v1-3-537c410f604f@oss.qualcomm.com>
Date: Mon, 09 Feb 2026 15:39:05 +0800
From: Wangao Wang <wangao.wang@....qualcomm.com>
To: Bryan O'Donoghue <bod@...nel.org>,
        Vikash Garodia <vikash.garodia@....qualcomm.com>,
        Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wangao Wang <wangao.wang@....qualcomm.com>
Subject: [PATCH 3/5] media: iris: Add IRIS_BSE_HW_CLK handling in power
 on/off sequence

On X1P42100 the Iris block has an extra BSE clock. Wire this clock into
the power on/off sequence.

The BSE clock is used to drive the Bin Stream Engine, which is a sub-block
of the video codec hardware responsible for bitstream-level processing. It
is required to be enabled separately from the core clock to ensure proper
codec operation.

Signed-off-by: Wangao Wang <wangao.wang@....qualcomm.com>
---
 drivers/media/platform/qcom/iris/iris_vpu_common.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/iris/iris_vpu_common.c b/drivers/media/platform/qcom/iris/iris_vpu_common.c
index 548e5f1727fdb7543f76a1871f17257fa2360733..8f5cfad87b42f52e49fc25bc0b43c7e1a0ccc5e1 100644
--- a/drivers/media/platform/qcom/iris/iris_vpu_common.c
+++ b/drivers/media/platform/qcom/iris/iris_vpu_common.c
@@ -226,6 +226,7 @@ void iris_vpu_power_off_hw(struct iris_core *core)
 	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN]);
 	iris_disable_unprepare_clock(core, IRIS_HW_AHB_CLK);
 	iris_disable_unprepare_clock(core, IRIS_HW_CLK);
+	iris_disable_unprepare_clock(core, IRIS_BSE_HW_CLK);
 }
 
 void iris_vpu_power_off(struct iris_core *core)
@@ -284,9 +285,13 @@ int iris_vpu_power_on_hw(struct iris_core *core)
 	if (ret)
 		return ret;
 
+	ret = iris_prepare_enable_clock(core, IRIS_BSE_HW_CLK);
+	if (ret && ret != -ENOENT)
+		goto err_disable_power;
+
 	ret = iris_prepare_enable_clock(core, IRIS_HW_CLK);
 	if (ret)
-		goto err_disable_power;
+		goto err_disable_bse_hw_clock;
 
 	ret = iris_prepare_enable_clock(core, IRIS_HW_AHB_CLK);
 	if (ret && ret != -ENOENT)
@@ -302,6 +307,8 @@ int iris_vpu_power_on_hw(struct iris_core *core)
 	iris_disable_unprepare_clock(core, IRIS_HW_AHB_CLK);
 err_disable_hw_clock:
 	iris_disable_unprepare_clock(core, IRIS_HW_CLK);
+err_disable_bse_hw_clock:
+	iris_disable_unprepare_clock(core, IRIS_BSE_HW_CLK);
 err_disable_power:
 	iris_disable_power_domains(core, core->pmdomain_tbl->pd_devs[IRIS_HW_POWER_DOMAIN]);
 

-- 
2.43.0