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Groups > linux.kernel > #1620468

[PATCH 4.9 130/152] ASoC: Intel: cht_bsw_rt5645: add Baytrail MCLK support

From Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups linux.kernel
Subject [PATCH 4.9 130/152] ASoC: Intel: cht_bsw_rt5645: add Baytrail MCLK support
Date 2017-04-10 19:30 +0200
Message-ID <tuLiA-3MR-75@gated-at.bofh.it> (permalink)
References <tuKFP-3ds-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit a50477e55fff69e1028f25624ee9fc9182d59b1f ]

The existing code assumes a 19.2 MHz MCLK as the default
hardware configuration. This is valid for CherryTrail but
not for Baytrail.

Add explicit MCLK configuration to set the 19.2 clock on/off
depending on DAPM events.

This is a prerequisite step to enable devices with Baytrail
and RT5645 such as Asus X205TA

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/soc/intel/boards/cht_bsw_rt5645.c |   84 +++++++++++++++++++++++++++-----
 1 file changed, 71 insertions(+), 13 deletions(-)

--- a/sound/soc/intel/boards/cht_bsw_rt5645.c
+++ b/sound/soc/intel/boards/cht_bsw_rt5645.c
@@ -24,6 +24,9 @@
 #include <linux/acpi.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <asm/cpu_device_id.h>
+#include <asm/platform_sst_audio.h>
+#include <linux/clk.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
@@ -45,6 +48,7 @@ struct cht_mc_private {
 	struct snd_soc_jack jack;
 	struct cht_acpi_card *acpi_card;
 	char codec_name[16];
+	struct clk *mclk;
 };
 
 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
@@ -65,6 +69,7 @@ static int platform_clock_control(struct
 	struct snd_soc_dapm_context *dapm = w->dapm;
 	struct snd_soc_card *card = dapm->card;
 	struct snd_soc_dai *codec_dai;
+	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
 	int ret;
 
 	codec_dai = cht_get_codec_dai(card);
@@ -73,19 +78,30 @@ static int platform_clock_control(struct
 		return -EIO;
 	}
 
-	if (!SND_SOC_DAPM_EVENT_OFF(event))
-		return 0;
+	if (SND_SOC_DAPM_EVENT_ON(event)) {
+		if (ctx->mclk) {
+			ret = clk_prepare_enable(ctx->mclk);
+			if (ret < 0) {
+				dev_err(card->dev,
+					"could not configure MCLK state");
+				return ret;
+			}
+		}
+	} else {
+		/* Set codec sysclk source to its internal clock because codec PLL will
+		 * be off when idle and MCLK will also be off when codec is
+		 * runtime suspended. Codec needs clock for jack detection and button
+		 * press. MCLK is turned off with clock framework or ACPI.
+		 */
+		ret = snd_soc_dai_set_sysclk(codec_dai, RT5645_SCLK_S_RCCLK,
+					48000 * 512, SND_SOC_CLOCK_IN);
+		if (ret < 0) {
+			dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
+			return ret;
+		}
 
-	/* Set codec sysclk source to its internal clock because codec PLL will
-	 * be off when idle and MCLK will also be off by ACPI when codec is
-	 * runtime suspended. Codec needs clock for jack detection and button
-	 * press.
-	 */
-	ret = snd_soc_dai_set_sysclk(codec_dai, RT5645_SCLK_S_RCCLK,
-			0, SND_SOC_CLOCK_IN);
-	if (ret < 0) {
-		dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
-		return ret;
+		if (ctx->mclk)
+			clk_disable_unprepare(ctx->mclk);
 	}
 
 	return 0;
@@ -97,7 +113,7 @@ static const struct snd_soc_dapm_widget
 	SND_SOC_DAPM_MIC("Int Mic", NULL),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 	SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
-			platform_clock_control, SND_SOC_DAPM_POST_PMD),
+			platform_clock_control, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 };
 
 static const struct snd_soc_dapm_route cht_rt5645_audio_map[] = {
@@ -225,6 +241,26 @@ static int cht_codec_init(struct snd_soc
 
 	rt5645_set_jack_detect(codec, &ctx->jack, &ctx->jack, &ctx->jack);
 
+	if (ctx->mclk) {
+		/*
+		 * The firmware might enable the clock at
+		 * boot (this information may or may not
+		 * be reflected in the enable clock register).
+		 * To change the rate we must disable the clock
+		 * first to cover these cases. Due to common
+		 * clock framework restrictions that do not allow
+		 * to disable a clock that has not been enabled,
+		 * we need to enable the clock first.
+		 */
+		ret = clk_prepare_enable(ctx->mclk);
+		if (!ret)
+			clk_disable_unprepare(ctx->mclk);
+
+		ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ);
+
+		if (ret)
+			dev_err(runtime->dev, "unable to set MCLK rate\n");
+	}
 	return ret;
 }
 
@@ -349,6 +385,18 @@ static struct cht_acpi_card snd_soc_card
 
 static char cht_rt5640_codec_name[16]; /* i2c-<HID>:00 with HID being 8 chars */
 
+static bool is_valleyview(void)
+{
+	static const struct x86_cpu_id cpu_ids[] = {
+		{ X86_VENDOR_INTEL, 6, 55 }, /* Valleyview, Bay Trail */
+		{}
+	};
+
+	if (!x86_match_cpu(cpu_ids))
+		return false;
+	return true;
+}
+
 static int snd_cht_mc_probe(struct platform_device *pdev)
 {
 	int ret_val = 0;
@@ -401,6 +449,16 @@ static int snd_cht_mc_probe(struct platf
 		cht_dailink[dai_index].codec_name = cht_rt5640_codec_name;
 	}
 
+	if (is_valleyview()) {
+		drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
+		if (IS_ERR(drv->mclk)) {
+			dev_err(&pdev->dev,
+				"Failed to get MCLK from pmc_plt_clk_3: %ld\n",
+				PTR_ERR(drv->mclk));
+			return PTR_ERR(drv->mclk);
+		}
+	}
+
 	snd_soc_card_set_drvdata(card, drv);
 	ret_val = devm_snd_soc_register_card(&pdev->dev, card);
 	if (ret_val) {

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[PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 18:50 +0200
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  [PATCH 4.9 109/152] ARM: OMAP2+: Fix init for multiple quirks for the same SoC Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
  [PATCH 4.9 128/152] ASoC: Intel: Baytrail: add quirk for Lenovo Thinkpad 10 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
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  [PATCH 4.9 114/152] ARM: davinci: PM: support da8xx DT platforms Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
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  [PATCH 4.9 112/152] Input: gpio_keys - add support for GPIO descriptors Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
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  [PATCH 4.9 134/152] HID: wacom: dont apply generic settings to old devices Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
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  [PATCH 4.9 129/152] ASoC: Intel: cht_bsw_rt5645: harden ACPI device detection Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
  [PATCH 4.9 123/152] [media] rx51: broken build Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
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  [PATCH 4.9 130/152] ASoC: Intel: cht_bsw_rt5645: add Baytrail MCLK support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
  [PATCH 4.9 028/152] brcmfmac: use local iftype avoiding use-after-free of virtual interface Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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  [PATCH 4.9 030/152] metag/usercopy: Fix alignment error checking Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 104/152] drm/i915: more .is_mobile cleanups for BDW Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 029/152] metag/usercopy: Drop unused macros Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 067/152] clocksource/drivers/arm_arch_timer: Dont assume clock runs in suspend Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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  [PATCH 4.9 077/152] arm64: PCI: Manage controller-specific data on per-controller basis Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 102/152] drm/edid: constify edid quirk list Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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  [PATCH 4.9 063/152] usb: dwc3: gadget: delay unmap of bounced requests Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 087/152] PCI: Add MCFG quirks for X-Gene host controller Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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  [PATCH 4.9 089/152] scsi: ufs: add quirk to increase host PA_SaveConfigTime Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 072/152] HID: multitouch: do not retrieve all reports for all devices Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 095/152] HID: asus: Fix keyboard support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 097/152] HID: multitouch: enable the Surface 4 Type Cover Pro (JP) to report multitouch data Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 076/152] x86/intel_idle: Add CPU model 0x4a (Atom Z34xx series) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 103/152] drm/i915: fix INTEL_BDW_IDS definition Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 031/152] metag/usercopy: Add early abort to copy_to_user Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 090/152] ALSA: usb-audio: add implicit fb quirk for Axe-Fx II Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 098/152] nvme: simplify stripe quirk Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 066/152] net/mlx4_core: Use device ID defines Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 105/152] drm/i915: actually drive the BDW reserved IDs Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 065/152] arm64: dts: hisi: fix hip06 sas am-max-trans quirk Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 084/152] PCI: thunder-pem: Factor out resource lookup Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
  [PATCH 4.9 034/152] metag/usercopy: Fix src fixup in from user rapf loops Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 046/152] MIPS: Force o32 fp64 support on 32bit MIPS64r6 kernels Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 057/152] drm/sun4i: tcon: Move SoC specific quirks to a DT matched data structure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 039/152] powerpc: Dont try to fix up misaligned load-with-reservation instructions Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 045/152] s390/uaccess: get_user() should zero on failure (again) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 062/152] HID: i2c-hid: add a simple quirk to fix device defects Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 049/152] MIPS: Lantiq: fix missing xbar kernel panic Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 052/152] MIPS: Flush wrong invalid FTLB entry for huge page Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 037/152] powerpc/mm: Add missing global TLB invalidate if cxl is active Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 036/152] powerpc: Disable HFSCR[TM] if TM is not supported Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 038/152] powerpc/64: Fix flush_(d|i)cache_range() called from modules Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 058/152] drm/sun4i: Add compatible strings for A31/A31s display pipelines Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 044/152] s390/decompressor: fix initrd corruption caused by bss clear Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 054/152] Documentation: stable-kernel-rules: fix stable-tag format Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 059/152] drm/sun4i: Add compatible string for A31/A31s TCON (timing controller) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 043/152] xtensa: make __pa work with uncached KSEG addresses Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 053/152] MIPS: c-r4k: Fix Loongson-3s vcache/scache waysize calculation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 025/152] xfs: Honor FALLOC_FL_KEEP_SIZE when punching ends of files Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 056/152] random: use chacha20 for get_random_int/long Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 032/152] metag/usercopy: Zero rest of buffer from copy_from_user Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 042/152] nios2: reserve boot memory for device tree Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 008/152] drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
  [PATCH 4.9 015/152] arm64: mm: unaligned access by user-land should be received as SIGBUS Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 012/152] arm/arm64: KVM: Take mmap_sem in kvm_arch_prepare_memory_region Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 005/152] drm/vmwgfx: avoid calling vzalloc with a 0 size in vmw_get_cap_3d_ioctl() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 014/152] iio: bmg160: reset chip when probing Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 021/152] dm verity fec: fix bufio leaks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 010/152] staging: android: ashmem: lseek failed due to no FMODE_LSEEK. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 013/152] kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 009/152] sysfs: be careful of error returns from ops->show() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 011/152] arm/arm64: KVM: Take mmap_sem in stage2_unmap_vm Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 004/152] drm/vmwgfx: NULL pointer dereference in vmw_surface_define_ioctl() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 016/152] cfg80211: check rdev resume callback only for registered wiphy Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 017/152] Reset TreeId to zero on SMB2 TREE_CONNECT Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 020/152] dm verity fec: limit error correction recursion Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 019/152] ptrace: fix PTRACE_LISTEN race corrupting task->state Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  [PATCH 4.9 001/152] ppdev: check before attaching port Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
  Re: [PATCH 4.9 000/152] 4.9.22-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-04-10 22:40 +0200
  Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-11 01:00 +0200
    Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 06:40 +0200
  Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-11 05:10 +0200
    Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 06:50 +0200
      Re: [PATCH 4.9 000/152] 4.9.22-stable review Tony Lindgren <tony@atomide.com> - 2017-04-11 17:20 +0200
        Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-12 03:50 +0200
          Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-12 08:30 +0200
  Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 07:10 +0200
    Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-11 14:50 +0200
      Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 16:40 +0200

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