linux-kernel - [PATCH v2] media: hantro: do a PM resume earlier

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Message-Id: <a8b63a10d606dcbee9acc17b54d5d8eaa3d8fc3e.1620311838.git.mchehab+huawei@kernel.org>
Date:   Thu,  6 May 2021 16:37:20 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev
Subject: [PATCH v2] media: hantro: do a PM resume earlier

The device_run() first enables the clock and then
tries to resume PM runtime, checking for errors.

Well, if for some reason the pm_runtime can not resume,
it would be better to detect it beforehand.

So, change the order inside device_run().

Reviewed-by: Ezequiel Garcia <ezequiel@...labora.com>
Fixes: 775fec69008d ("media: add Rockchip VPU JPEG encoder driver")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/staging/media/hantro/hantro_drv.c | 35 +++++++++++++++--------
 1 file changed, 23 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
index 595e82a82728..eea2009fa17b 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -56,16 +56,12 @@ dma_addr_t hantro_get_ref(struct hantro_ctx *ctx, u64 ts)
 	return hantro_get_dec_buf_addr(ctx, buf);
 }
 
-static void hantro_job_finish(struct hantro_dev *vpu,
-			      struct hantro_ctx *ctx,
-			      enum vb2_buffer_state result)
+static void hantro_job_finish_no_pm(struct hantro_dev *vpu,
+				    struct hantro_ctx *ctx,
+				    enum vb2_buffer_state result)
 {
 	struct vb2_v4l2_buffer *src, *dst;
 
-	pm_runtime_mark_last_busy(vpu->dev);
-	pm_runtime_put_autosuspend(vpu->dev);
-	clk_bulk_disable(vpu->variant->num_clocks, vpu->clocks);
-
 	src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
 	dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
 
@@ -81,6 +77,18 @@ static void hantro_job_finish(struct hantro_dev *vpu,
 					 result);
 }
 
+static void hantro_job_finish(struct hantro_dev *vpu,
+			      struct hantro_ctx *ctx,
+			      enum vb2_buffer_state result)
+{
+	pm_runtime_mark_last_busy(vpu->dev);
+	pm_runtime_put_autosuspend(vpu->dev);
+
+	clk_bulk_disable(vpu->variant->num_clocks, vpu->clocks);
+
+	hantro_job_finish_no_pm(vpu, ctx, result);
+}
+
 void hantro_irq_done(struct hantro_dev *vpu,
 		     enum vb2_buffer_state result)
 {
@@ -152,11 +160,14 @@ static void device_run(void *priv)
 	src = hantro_get_src_buf(ctx);
 	dst = hantro_get_dst_buf(ctx);
 
-	ret = clk_bulk_enable(ctx->dev->variant->num_clocks, ctx->dev->clocks);
-	if (ret)
-		goto err_cancel_job;
 	ret = pm_runtime_get_sync(ctx->dev->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(ctx->dev->dev);
+		goto err_cancel_job;
+	}
+
+	ret = clk_bulk_enable(ctx->dev->variant->num_clocks, ctx->dev->clocks);
+	if (ret)
 		goto err_cancel_job;
 
 	v4l2_m2m_buf_copy_metadata(src, dst, true);
@@ -165,7 +176,7 @@ static void device_run(void *priv)
 	return;
 
 err_cancel_job:
-	hantro_job_finish(ctx->dev, ctx, VB2_BUF_STATE_ERROR);
+	hantro_job_finish_no_pm(ctx->dev, ctx, VB2_BUF_STATE_ERROR);
 }
 
 static struct v4l2_m2m_ops vpu_m2m_ops = {
-- 
2.30.2