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From: Konrad Dybcio <konrad.dybcio@linaro.org>
Date: Fri, 09 Feb 2024 22:10:04 +0100
Subject: [PATCH v2 20/20] media: venus: pm_helpers: Use reset_bulk API
Precedence: bulk
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Message-Id: <20230911-topic-mars-v2-20-3dac84b88c4b@linaro.org>
References: <20230911-topic-mars-v2-0-3dac84b88c4b@linaro.org>
In-Reply-To: <20230911-topic-mars-v2-0-3dac84b88c4b@linaro.org>
To: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>, 
 Vikash Garodia <quic_vgarodia@quicinc.com>, 
 Bryan O'Donoghue <bryan.odonoghue@linaro.org>, 
 Andy Gross <agross@kernel.org>, Bjorn Andersson <andersson@kernel.org>, 
 Mauro Carvalho Chehab <mchehab@kernel.org>, 
 Dikshita Agarwal <quic_dikshita@quicinc.com>, 
 Philipp Zabel <p.zabel@pengutronix.de>
Cc: Marijn Suijten <marijn.suijten@somainline.org>, 
 Stanimir Varbanov <stanimir.varbanov@linaro.org>, 
 Mauro Carvalho Chehab <mchehab+huawei@kernel.org>, 
 linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, 
 linux-kernel@vger.kernel.org, Konrad Dybcio <konrad.dybcio@linaro.org>

All of the resets are toggled together. Use the bulk api to save on some
code complexity.

The delay between resets is now correctly determined by the reset
framework.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/media/platform/qcom/venus/core.c       | 15 ++++++++++-----
 drivers/media/platform/qcom/venus/core.h       |  4 ++--
 drivers/media/platform/qcom/venus/pm_helpers.c | 15 +++------------
 3 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 873affe17537..ff5601a5ce77 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -328,11 +328,16 @@ static int venus_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	for (i = 0; i < res->resets_num; i++) {
-		core->resets[i] = devm_reset_control_get_exclusive(dev, res->resets[i]);
-		if (IS_ERR(core->resets[i]))
-			return PTR_ERR(core->resets[i]);
-	}
+	core->resets = devm_kcalloc(dev, res->resets_num, sizeof(*core->resets), GFP_KERNEL);
+	if (res->resets_num && !core->resets)
+		return -ENOMEM;
+
+	for (i = 0; i < res->resets_num; i++)
+		core->resets[i].id = res->resets[i];
+
+	ret = devm_reset_control_bulk_get_exclusive(dev, res->resets_num, core->resets);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get resets\n");
 
 	ret = venus_get_resources(core);
 	if (ret)
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 6ecaa3e38cac..2376b9cbdf2c 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -130,7 +130,7 @@ struct venus_format {
  * @pmdomains:	a pointer to a list of pmdomains
  * @opp_dl_venus: an device-link for device OPP
  * @opp_pmdomain: an OPP power-domain
- * @resets: an array of reset signals
+ * @resets: a reset_control_bulk_data array of hardware reset signals
  * @vdev_dec:	a reference to video device structure for decoder instances
  * @vdev_enc:	a reference to video device structure for encoder instances
  * @v4l2_dev:	a holder for v4l2 device structure
@@ -183,7 +183,7 @@ struct venus_core {
 	struct dev_pm_domain_list *pmdomains;
 	struct device_link *opp_dl_venus;
 	struct device *opp_pmdomain;
-	struct reset_control *resets[VIDC_RESETS_NUM_MAX];
+	struct reset_control_bulk_data *resets;
 	struct video_device *vdev_dec;
 	struct video_device *vdev_enc;
 	struct v4l2_device v4l2_dev;
diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
index 9df8f2292c17..170fb131cb1e 100644
--- a/drivers/media/platform/qcom/venus/pm_helpers.c
+++ b/drivers/media/platform/qcom/venus/pm_helpers.c
@@ -865,21 +865,12 @@ void vcodec_domains_put(struct venus_core *core)
 static int core_resets_reset(struct venus_core *core)
 {
 	const struct venus_resources *res = core->res;
-	unsigned int i;
 	int ret;
 
-	for (i = 0; i < res->resets_num; i++) {
-		ret = reset_control_assert(core->resets[i]);
-		if (ret)
-			goto err;
-
-		usleep_range(150, 250);
-		ret = reset_control_deassert(core->resets[i]);
-		if (ret)
-			goto err;
-	}
+	ret = reset_control_bulk_reset(res->resets_num, core->resets);
+	if (ret)
+		dev_err(core->dev, "Failed to toggle resets: %d\n", ret);
 
-err:
 	return ret;
 }
 

-- 
2.43.0