80 lines
2.4 KiB
Diff
80 lines
2.4 KiB
Diff
From 5c4835e943dd31265770e7ca3c03307d5c725db6 Mon Sep 17 00:00:00 2001
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From: Viorel Suman <viorel.suman@nxp.com>
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Date: Thu, 25 Apr 2019 15:03:56 +0300
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Subject: [PATCH] MLK-21484-4: ASoC: fsl_sai: ensure clk not in use prior
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set_mclk_rate
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On recent kernels clks which are marked with CLK_SET_RATE_GATE are
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"protected" against further changes at clk_prepare time, including clk
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set_parent and set_rate. See commit 9461f7b33d11 ("clk: fix
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CLK_SET_RATE_GATE with clock rate protection"). The current fsl_sai
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implementation ensures the clock is not in use prior set_parent,
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extend this for set_rate also by moving if (sai->mclk_streams == 0)
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outside fsl_sai_set_mclk_rate(). Aside of this avoid changing rate and
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parent for BUS clk.
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Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
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---
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sound/soc/fsl/fsl_sai.c | 30 +++++++++++++-----------------
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1 file changed, 13 insertions(+), 17 deletions(-)
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--- a/sound/soc/fsl/fsl_sai.c
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+++ b/sound/soc/fsl/fsl_sai.c
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@@ -259,25 +259,19 @@ static int fsl_sai_set_mclk_rate(struct
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if (pll) {
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npll = (do_div(ratio, 8000) ? sai->pll11k_clk : sai->pll8k_clk);
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if (!clk_is_match(pll, npll)) {
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- if (sai->mclk_streams == 0) {
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- ret = clk_set_parent(p, npll);
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- if (ret < 0)
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- dev_warn(dai->dev,
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- "failed to set parent %s: %d\n",
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- __clk_get_name(npll), ret);
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- } else {
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- dev_err(dai->dev,
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- "PLL %s is in use by a running stream.\n",
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- __clk_get_name(pll));
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- return -EINVAL;
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- }
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+ ret = clk_set_parent(p, npll);
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+ if (ret < 0)
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+ dev_warn(dai->dev,
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+ "failed to set parent %s: %d\n",
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+ __clk_get_name(npll), ret);
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}
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}
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ret = clk_set_rate(sai->mclk_clk[clk_id], freq);
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if (ret < 0)
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dev_err(dai->dev, "failed to set clock rate (%u): %d\n",
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- freq, ret);
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+ freq, ret);
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+
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return ret;
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}
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@@ -298,7 +292,7 @@ static int fsl_sai_set_dai_sysclk(struct
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if (dir == SND_SOC_CLOCK_IN)
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return 0;
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- if (freq > 0) {
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+ if (freq > 0 && clk_id != FSL_SAI_CLK_BUS) {
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if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) {
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dev_err(cpu_dai->dev, "Unknown clock id: %d\n", clk_id);
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return -EINVAL;
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@@ -309,9 +303,11 @@ static int fsl_sai_set_dai_sysclk(struct
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return -EINVAL;
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}
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- ret = fsl_sai_set_mclk_rate(cpu_dai, clk_id, freq);
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- if (ret < 0)
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- return ret;
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+ if (sai->mclk_streams == 0) {
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+ ret = fsl_sai_set_mclk_rate(cpu_dai, clk_id, freq);
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+ if (ret < 0)
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+ return ret;
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+ }
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}
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ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
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