linux-kernel - [PATCH] media: venus: assign unique bus_info strings for encoder and decoder

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Message-ID: <20251121184306.218169-1-jorge.ramirez@oss.qualcomm.com>
Date: Fri, 21 Nov 2025 19:43:01 +0100
From: Jorge Ramirez-Ortiz <jorge.ramirez@....qualcomm.com>
To: jorge.ramirez@....qualcomm.com, vikash.garodia@....qualcomm.com,
        dikshita.agarwal@....qualcomm.com, bod@...nel.org, mchehab@...nel.org
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] media: venus: assign unique bus_info strings for encoder and decoder

The Venus encoder and decoder video devices currently report the same
bus_info string ("platform:qcom-venus").

Assign unique bus_info identifiers by appending ":dec" and ":enc" to the
parent device name. With this change v4l2-ctl will display two separate
logical devices

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez@....qualcomm.com>
---
 drivers/media/platform/qcom/venus/vdec.c | 5 +++++
 drivers/media/platform/qcom/venus/venc.c | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 4a6641fdffcf..63f6ae1ff6ac 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -433,9 +433,14 @@ vdec_g_selection(struct file *file, void *fh, struct v4l2_selection *s)
 static int
 vdec_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 {
+	struct venus_inst *inst = to_inst(file);
+	struct venus_core *core = inst->core;
+
 	strscpy(cap->driver, "qcom-venus", sizeof(cap->driver));
 	strscpy(cap->card, "Qualcomm Venus video decoder", sizeof(cap->card));
 	strscpy(cap->bus_info, "platform:qcom-venus", sizeof(cap->bus_info));
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:%s:dec", dev_name(core->dev));
 
 	return 0;
 }
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index b478b982a80d..520689f5533d 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -144,9 +144,14 @@ static int venc_v4l2_to_hfi(int id, int value)
 static int
 venc_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
 {
+	struct venus_inst *inst = to_inst(file);
+	struct venus_core *core = inst->core;
+
 	strscpy(cap->driver, "qcom-venus", sizeof(cap->driver));
 	strscpy(cap->card, "Qualcomm Venus video encoder", sizeof(cap->card));
 	strscpy(cap->bus_info, "platform:qcom-venus", sizeof(cap->bus_info));
+	snprintf(cap->bus_info, sizeof(cap->bus_info),
+		 "platform:%s:enc", dev_name(core->dev));
 
 	return 0;
 }
-- 
2.43.0