linux-kernel - [PATCH v2] media: qcom: camss: tpg: Add tpg support for qcs8300

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Message-ID: <20250717-qcs8300_tpg-v2-1-0946c69c2c8b@quicinc.com>
Date: Thu, 17 Jul 2025 12:18:18 +0800
From: Wenmeng Liu <quic_wenmliu@...cinc.com>
To: Robert Foss <rfoss@...nel.org>, Todor Tomov <todor.too@...il.com>,
        "Bryan
 O'Donoghue" <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab
	<mchehab@...nel.org>
CC: <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Wenmeng Liu <quic_wenmliu@...cinc.com>
Subject: [PATCH v2] media: qcom: camss: tpg: Add tpg support for qcs8300

Add support for TPG found on QCS8300.

Signed-off-by: Wenmeng Liu <quic_wenmliu@...cinc.com>
---
QCS8300 is a Qualcomm SoC. This series adds driver changes to
bring up TPG in QCS8300.

Tested with following commands:
- media-ctl --reset
- v4l2-ctl -d /dev/v4l-subdev0 -c test_pattern=0
- media-ctl -V '"msm_tpg0":0[fmt:SRGGB10/4608x2592 field:none]'
- media-ctl -V '"msm_csid0":0[fmt:SRGGB10/4608x2592 field:none]'
- media-ctl -V '"msm_vfe0_rdi0":0[fmt:SRGGB10/4608x2592 field:none]'
- media-ctl -l '"msm_tpg0":1->"msm_csid0":0[1]'
- media-ctl -l '"msm_csid0":1->"msm_vfe0_rdi0":0[1]'
- v4l2-ctl -d /dev/v4l-subdev3 -c test_pattern=9
- yavta -B capture-mplane -n 5 -f SRGGB10P -s 4608x2592 /dev/video0
  --capture=7

Dependencies:
https://lore.kernel.org/all/20250717-lemans_tpg-v2-0-a2538659349c@quicinc.com/

Changes in v2:
- rebase tpg changes based on new versions of sa8775p and qcs8300 camss patches
- Link to v1: https://lore.kernel.org/all/20250217-qcs8300_tpg-v1-1-6e0f4dd3ad1f@quicinc.com/
---
 drivers/media/platform/qcom/camss/camss.c | 52 ++++++++++++++++++++++++++++++-
 1 file changed, 51 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/camss/camss.c b/drivers/media/platform/qcom/camss/camss.c
index ced31e3655a52a7b2e55b109085cf24a9e230f1d..68411e4a5c55b394145ba907f18cb03e235dcc23 100644
--- a/drivers/media/platform/qcom/camss/camss.c
+++ b/drivers/media/platform/qcom/camss/camss.c
@@ -2548,6 +2548,53 @@ static const struct camss_subdev_resources csiphy_res_8300[] = {
 	},
 };
 
+static const struct camss_subdev_resources tpg_res_8300[] = {
+	/* TPG0 */
+	{
+		.regulators = {  },
+		.clock = { "csiphy_rx" },
+		.clock_rate = { { 400000000 } },
+		.reg = { "tpg0" },
+		.interrupt = { "tpg0" },
+		.tpg = {
+			.lane_cnt = 4,
+			.vc_cnt = 1,
+			.formats = &tpg_formats_gen1,
+			.hw_ops = &tpg_ops_gen1
+		}
+	},
+
+	/* TPG1 */
+	{
+		.regulators = {  },
+		.clock = { "csiphy_rx" },
+		.clock_rate = { { 400000000 } },
+		.reg = { "tpg1" },
+		.interrupt = { "tpg1" },
+		.tpg = {
+			.lane_cnt = 4,
+			.vc_cnt = 1,
+			.formats = &tpg_formats_gen1,
+			.hw_ops = &tpg_ops_gen1
+		}
+	},
+
+	/* TPG2 */
+	{
+		.regulators = {  },
+		.clock = { "csiphy_rx" },
+		.clock_rate = { { 400000000 } },
+		.reg = { "tpg2" },
+		.interrupt = { "tpg2" },
+		.tpg = {
+			.lane_cnt = 4,
+			.vc_cnt = 1,
+			.formats = &tpg_formats_gen1,
+			.hw_ops = &tpg_ops_gen1
+		}
+	},
+};
+
 static const struct camss_subdev_resources csid_res_8300[] = {
 	/* CSID0 */
 	{
@@ -4492,7 +4539,8 @@ static int camss_probe(struct platform_device *pdev)
 	if (!camss->csiphy)
 		return -ENOMEM;
 
-	if (camss->res->version == CAMSS_8775P) {
+	if (camss->res->version == CAMSS_8775P ||
+	    camss->res->version == CAMSS_8300) {
 		camss->tpg = devm_kcalloc(dev, camss->res->tpg_num,
 					  sizeof(*camss->tpg), GFP_KERNEL);
 		if (!camss->tpg)
@@ -4677,11 +4725,13 @@ static const struct camss_resources qcs8300_resources = {
 	.version = CAMSS_8300,
 	.pd_name = "top",
 	.csiphy_res = csiphy_res_8300,
+	.tpg_res = tpg_res_8300,
 	.csid_res = csid_res_8300,
 	.csid_wrapper_res = &csid_wrapper_res_qcs8300,
 	.vfe_res = vfe_res_8300,
 	.icc_res = icc_res_qcs8300,
 	.csiphy_num = ARRAY_SIZE(csiphy_res_8300),
+	.tpg_num = ARRAY_SIZE(tpg_res_8300),
 	.csid_num = ARRAY_SIZE(csid_res_8300),
 	.vfe_num = ARRAY_SIZE(vfe_res_8300),
 	.icc_path_num = ARRAY_SIZE(icc_res_qcs8300),

---
base-commit: dc3d6ecbfebec02791feea0b08062540badcb5a2
change-id: 20250717-qcs8300_tpg-f7735e998310

Best regards,
-- 
Wenmeng Liu <quic_wenmliu@...cinc.com>