linux-kernel - [PATCH v10 03/12] dmaengine: qcom: bam_dma: Add bam_pipe

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Message-Id: <20251219-qcom-qce-cmd-descr-v10-3-ff7e4bf7dad4@oss.qualcomm.com>
Date: Fri, 19 Dec 2025 11:07:42 +0100
From: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
To: Vinod Koul <vkoul@...nel.org>, Jonathan Corbet <corbet@....net>,
        Thara Gopinath <thara.gopinath@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Udit Tiwari <quic_utiwari@...cinc.com>,
        Daniel Perez-Zoghbi <dperezzo@...cinc.com>,
        Md Sadre Alam <mdalam@....qualcomm.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Peter Ujfalusi <peter.ujfalusi@...il.com>,
        Michal Simek <michal.simek@....com>
Cc: dmaengine@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Subject: [PATCH v10 03/12] dmaengine: qcom: bam_dma: Add bam_pipe_lock flag
 support

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Extend the device match data with a flag indicating whether the IP
supports the BAM lock/unlock feature. Set it to true on BAM IP versions
1.4.0 and above.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
---
 drivers/dma/qcom/bam_dma.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index 6f78e6b1674a0ff3deef4c3d1892a978555b3807..0ce9153da67032dc8ce910f68d1f80019d8b29f4 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -114,6 +114,7 @@ struct reg_offset_data {
 
 struct bam_device_data {
 	const struct reg_offset_data *reg_info;
+	bool bam_pipe_lock;
 };
 
 static const struct reg_offset_data bam_v1_3_reg_info[] = {
@@ -180,6 +181,7 @@ static const struct reg_offset_data bam_v1_4_reg_info[] = {
 
 static const struct bam_device_data bam_v1_4_data = {
 	.reg_info = bam_v1_4_reg_info,
+	.bam_pipe_lock = true,
 };
 
 static const struct reg_offset_data bam_v1_7_reg_info[] = {
@@ -213,6 +215,7 @@ static const struct reg_offset_data bam_v1_7_reg_info[] = {
 
 static const struct bam_device_data bam_v1_7_data = {
 	.reg_info = bam_v1_7_reg_info,
+	.bam_pipe_lock = true,
 };
 
 /* BAM CTRL */

-- 
2.47.3