linux-kernel - [PATCH 17/23] staging: media: tegra-video: add a per-soc enable/disable op

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Message-Id: <20221109141852.729246-18-luca.ceresoli@bootlin.com>
Date:   Wed,  9 Nov 2022 15:18:46 +0100
From:   luca.ceresoli@...tlin.com
To:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Sowjanya Komatineni <skomatineni@...dia.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Dmitry Osipenko <digetx@...il.com>
Cc:     Luca Ceresoli <luca.ceresoli@...tlin.com>,
        linux-media@...r.kernel.org, linux-tegra@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Richard Leitner <richard.leitner@...data.com>
Subject: [PATCH 17/23] staging: media: tegra-video: add a per-soc enable/disable op

From: Luca Ceresoli <luca.ceresoli@...tlin.com>

The Tegra20 VI needs an additional operation to enable the VI, add an
operation for that.

Signed-off-by: Luca Ceresoli <luca.ceresoli@...tlin.com>
---
 drivers/staging/media/tegra-video/vi.c | 7 +++++++
 drivers/staging/media/tegra-video/vi.h | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 2dd3c6c944a2..d0c387873d4e 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -1853,6 +1853,9 @@ static int tegra_vi_probe(struct platform_device *pdev)
 	vi->client.ops = &vi_client_ops;
 	vi->client.dev = &pdev->dev;
 
+	if (vi->ops->vi_enable)
+		vi->ops->vi_enable(vi, true);
+
 	ret = host1x_client_register(&vi->client);
 	if (ret < 0) {
 		dev_err(&pdev->dev,
@@ -1863,6 +1866,8 @@ static int tegra_vi_probe(struct platform_device *pdev)
 	return 0;
 
 rpm_disable:
+	if (vi->ops->vi_enable)
+		vi->ops->vi_enable(vi, false);
 	pm_runtime_disable(&pdev->dev);
 	return ret;
 }
@@ -1879,6 +1884,8 @@ static int tegra_vi_remove(struct platform_device *pdev)
 		return err;
 	}
 
+	if (vi->ops->vi_enable)
+		vi->ops->vi_enable(vi, false);
 	pm_runtime_disable(&pdev->dev);
 
 	return 0;
diff --git a/drivers/staging/media/tegra-video/vi.h b/drivers/staging/media/tegra-video/vi.h
index 879547073371..851c4f3fcb91 100644
--- a/drivers/staging/media/tegra-video/vi.h
+++ b/drivers/staging/media/tegra-video/vi.h
@@ -37,8 +37,11 @@ enum tegra_vi_pg_mode {
 	TEGRA_VI_PG_PATCH,
 };
 
+struct tegra_vi;
+
 /**
  * struct tegra_vi_ops - Tegra VI operations
+ * @vi_enable: soc-specific operations needed to enable/disable the VI peripheral
  * @vi_fmt_align: modify `pix` to fit the hardware alignment
  *		requirements and fill image geometry
  * @vi_start_streaming: starts media pipeline, subdevice streaming, sets up
@@ -48,6 +51,7 @@ enum tegra_vi_pg_mode {
  *		back any queued buffers.
  */
 struct tegra_vi_ops {
+	int (*vi_enable)(struct tegra_vi *vi, bool on);
 	void (*vi_fmt_align)(struct v4l2_pix_format *pix, unsigned int bpp);
 	int (*vi_start_streaming)(struct vb2_queue *vq, u32 count);
 	void (*vi_stop_streaming)(struct vb2_queue *vq);
-- 
2.34.1