From a292e26529c7f46a549625f94bdbba004d8caa5f Mon Sep 17 00:00:00 2001 From: Dom Cobley Date: Mon, 22 Feb 2021 18:50:50 +0000 Subject: [PATCH] rpivid: Request maximum hevc clock Query maximum and minimum clock from driver and use those Signed-off-by: Dom Cobley --- drivers/staging/media/rpivid/rpivid_video.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/drivers/staging/media/rpivid/rpivid_video.c +++ b/drivers/staging/media/rpivid/rpivid_video.c @@ -490,6 +490,7 @@ static int rpivid_start_streaming(struct { struct rpivid_ctx *ctx = vb2_get_drv_priv(vq); struct rpivid_dev *dev = ctx->dev; + long max_hevc_clock = clk_round_rate(dev->clock, ULONG_MAX); int ret = 0; if (ctx->src_fmt.pixelformat != V4L2_PIX_FMT_HEVC_SLICE) @@ -498,7 +499,7 @@ static int rpivid_start_streaming(struct if (V4L2_TYPE_IS_OUTPUT(vq->type) && dev->dec_ops->start) ret = dev->dec_ops->start(ctx); - ret = clk_set_rate(dev->clock, 500 * 1000 * 1000); + ret = clk_set_rate(dev->clock, max_hevc_clock); if (ret) { dev_err(dev->dev, "Failed to set clock rate\n"); goto out; @@ -519,12 +520,18 @@ static void rpivid_stop_streaming(struct { struct rpivid_ctx *ctx = vb2_get_drv_priv(vq); struct rpivid_dev *dev = ctx->dev; + long min_hevc_clock = clk_round_rate(dev->clock, 0); + int ret; if (V4L2_TYPE_IS_OUTPUT(vq->type) && dev->dec_ops->stop) dev->dec_ops->stop(ctx); rpivid_queue_cleanup(vq, VB2_BUF_STATE_ERROR); + ret = clk_set_rate(dev->clock, min_hevc_clock); + if (ret) + dev_err(dev->dev, "Failed to set minimum clock rate\n"); + clk_disable_unprepare(dev->clock); }