From: Takashi Iwai <tiwai@suse.de>
To: Michele Curti <michele.curti@gmail.com>
Cc: alsa-devel@alsa-project.org
Subject: Re: writing an alsa driver
Date: Wed, 27 May 2015 08:45:43 +0200 [thread overview]
Message-ID: <s5h7fruecx4.wl-tiwai@suse.de> (raw)
In-Reply-To: <20150523163221.GA936@asus>
At Sat, 23 May 2015 18:32:51 +0200,
Michele Curti wrote:
>
> On Thu, May 21, 2015 at 04:52:32PM +0200, Michele Curti wrote:
> > Hi all,
> > I'm going to *try* to "write" a driver for the sound card on my new laptop,
> > an asus x205ta.
> >
> > To be fair I have almost no experience but I'm hoping that all the code is
> > already present and it only needs some adaptations.
> >
> > The cpu is a intel bay trail z3735f, the sound card is a realtek rt5648 that
> > has the same product Id of the rt5645 (0x6308).
> >
> > I see in kernel sources:
> > - the codec driver
> > sound/soc/codecs/rt5645.c
> > - a baytrail board that uses the rt5640
> > sound/soc/intel/boards/byt-rt5640.c
> > - a braswell board that uses the rt5645
> > sound/soc/intel/boards/cht_bsw_rt5645.c
> >
> > What do you think? Is it feasible, given a good amount of free-time? :p
> >
> > Thanks,
> > Michele
>
>
> So I started.. :)
> At the end of the email there is the patch.
>
>
> What I did:
> - copied the board file byt-rt5640.c to byt-rt5645.c
> - find&replace 5640->5645 in byt-rt5645.c
> - added acpi device id to detect the sound card
> - added kernel config SND_SOC_INTEL_BYT_RT5645_MACH to select the driver
>
>
> Nothing works.
>
> But at least the right modules are loaded it seems.. Here the output of
> "lsmod | grep snd":
> snd_soc_sst_baytrail_pcm 24576 0
> snd_soc_sst_ipc 16384 1 snd_soc_sst_baytrail_pcm
> snd_soc_sst_dsp 36864 2 snd_soc_sst_baytrail_pcm,snd_soc_sst_ipc
> snd_soc_sst_byt_rt5645_mach 16384 0
> snd_soc_rt5645 94208 0
> regmap_i2c 16384 1 snd_soc_rt5645
> snd_soc_rl6231 16384 1 snd_soc_rt5645
> snd_soc_core 159744 3 snd_soc_rt5645,snd_soc_sst_baytrail_pcm,snd_soc_sst_byt_rt5645_mach
> snd_compress 20480 1 snd_soc_core
> dw_dmac_core 28672 2 dw_dmac,snd_soc_sst_dsp
> snd_pcm 90112 3 snd_soc_rt5645,snd_soc_core,snd_soc_sst_baytrail_pcm
> snd_timer 28672 1 snd_pcm
> snd 57344 4 snd_soc_core,snd_timer,snd_pcm,snd_compress
> soundcore 16384 1 snd
> snd_soc_sst_acpi 16384 0
>
>
> And dmesg tells me:
> [ +1.386847] rt5645 i2c-10EC5648:00: Failed to reguest IRQ: -22
> [ +0.000102] rt5645 i2c-10EC5648:00: Fail gpio_request hp_det_gpio
> [ +0.000094] rt5645 i2c-10EC5648:00: Fail gpio_direction hp_det_gpio
> [ +0.088989] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.062539] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.021995] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.001828] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.016646] i2c_hid i2c-PDEC3393:00: error in i2c_hid_init_report size:7 / ret_size:4
> [ +0.002541] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.004755] brcmfmac: brcmf_sdio_drivestrengthinit: No SDIO Drive strength init done for chip 43340 rev 2 pmurev 20
> [ +0.003586] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.002844] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.001705] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.011199] i2c_hid i2c-PDEC3393:00: error in i2c_hid_init_report size:19 / ret_size:4
> [ +0.018094] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.067913] i2c_hid i2c-ELAN0100:00: error in i2c_hid_init_report size:633 / ret_size:7
> [ +0.004378] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.000145] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.000980] i2c_hid i2c-ELAN0100:00: error in i2c_hid_init_report size:131 / ret_size:7
> [ +0.000949] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.020845] (NULL device *): ipc: error DSP boot timeout
> [ +0.213465] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.036706] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +0.008144] byt-rt5645 byt-rt5645: ASoC: CPU DAI baytrail-pcm-audio not registered
> [ +1.811435] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Jun 17 2014 11:48:43 version 6.10.190.49 (r485840) FWID 01-8744bcd2
> [ +0.014526] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code
> [ +0.092535] brcmfmac: brcmf_add_if: ERROR: netdev:wlan0 already exists
> [ +0.000011] brcmfmac: brcmf_add_if: ignore IF event
>
>
> For now I'm at a standstill and I don't understand a lot of things...
> I will read the code.. :)
>
> Regards,
> Michele
>
> Signed-off-by: Michele Curti <michele.curti@gmail.com>
Keyon, could you take a look?
Takashi
> ---
> sound/soc/codecs/rt5645.c | 2 +
> sound/soc/intel/Kconfig | 9 ++
> sound/soc/intel/boards/Makefile | 2 +
> sound/soc/intel/boards/byt-rt5645.c | 222 ++++++++++++++++++++++++++++++++++++
> sound/soc/intel/common/sst-acpi.c | 1 +
> 5 files changed, 236 insertions(+)
> create mode 100644 sound/soc/intel/boards/byt-rt5645.c
>
> diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
> index be4d741..3692569 100644
> --- a/sound/soc/codecs/rt5645.c
> +++ b/sound/soc/codecs/rt5645.c
> @@ -2652,6 +2652,7 @@ static const struct regmap_config rt5645_regmap = {
>
> static const struct i2c_device_id rt5645_i2c_id[] = {
> { "rt5645", 0 },
> + { "rt5648", 0 },
> { "rt5650", 0 },
> { }
> };
> @@ -2660,6 +2661,7 @@ MODULE_DEVICE_TABLE(i2c, rt5645_i2c_id);
> #ifdef CONFIG_ACPI
> static struct acpi_device_id rt5645_acpi_match[] = {
> { "10EC5645", 0 },
> + { "10EC5648", 0 },
> { "10EC5650", 0 },
> {},
> };
> diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
> index ee03dbd..ad324c0 100644
> --- a/sound/soc/intel/Kconfig
> +++ b/sound/soc/intel/Kconfig
> @@ -65,6 +65,15 @@ config SND_SOC_INTEL_BYT_RT5640_MACH
> This adds audio driver for Intel Baytrail platform based boards
> with the RT5640 audio codec.
>
> +config SND_SOC_INTEL_BYT_RT5645_MACH
> + tristate "ASoC Audio driver for Intel Baytrail with RT5645 codec"
> + depends on SND_SOC_INTEL_SST && X86_INTEL_LPSS && I2C
> + select SND_SOC_INTEL_BAYTRAIL
> + select SND_SOC_RT5645
> + help
> + This adds audio driver for Intel Baytrail platform based boards
> + with the RT5645 audio codec.
> +
> config SND_SOC_INTEL_BYT_MAX98090_MACH
> tristate "ASoC Audio driver for Intel Baytrail with MAX98090 codec"
> depends on SND_SOC_INTEL_SST && X86_INTEL_LPSS && I2C
> diff --git a/sound/soc/intel/boards/Makefile b/sound/soc/intel/boards/Makefile
> index f8237f0..bcb082a 100644
> --- a/sound/soc/intel/boards/Makefile
> +++ b/sound/soc/intel/boards/Makefile
> @@ -1,5 +1,6 @@
> snd-soc-sst-haswell-objs := haswell.o
> snd-soc-sst-byt-rt5640-mach-objs := byt-rt5640.o
> +snd-soc-sst-byt-rt5645-mach-objs := byt-rt5645.o
> snd-soc-sst-byt-max98090-mach-objs := byt-max98090.o
> snd-soc-sst-broadwell-objs := broadwell.o
> snd-soc-sst-bytcr-rt5640-objs := bytcr_rt5640.o
> @@ -8,6 +9,7 @@ snd-soc-sst-cht-bsw-rt5645-objs := cht_bsw_rt5645.o
>
> obj-$(CONFIG_SND_SOC_INTEL_HASWELL_MACH) += snd-soc-sst-haswell.o
> obj-$(CONFIG_SND_SOC_INTEL_BYT_RT5640_MACH) += snd-soc-sst-byt-rt5640-mach.o
> +obj-$(CONFIG_SND_SOC_INTEL_BYT_RT5645_MACH) += snd-soc-sst-byt-rt5645-mach.o
> obj-$(CONFIG_SND_SOC_INTEL_BYT_MAX98090_MACH) += snd-soc-sst-byt-max98090-mach.o
> obj-$(CONFIG_SND_SOC_INTEL_BROADWELL_MACH) += snd-soc-sst-broadwell.o
> obj-$(CONFIG_SND_SOC_INTEL_BYTCR_RT5640_MACH) += snd-soc-sst-bytcr-rt5640.o
> diff --git a/sound/soc/intel/boards/byt-rt5645.c b/sound/soc/intel/boards/byt-rt5645.c
> new file mode 100644
> index 0000000..5bdb56e
> --- /dev/null
> +++ b/sound/soc/intel/boards/byt-rt5645.c
> @@ -0,0 +1,222 @@
> +/*
> + * Intel Baytrail SST RT5645 machine driver
> + * Copyright (c) 2014, Intel Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + */
> +
> +#include <linux/init.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/acpi.h>
> +#include <linux/device.h>
> +#include <linux/dmi.h>
> +#include <linux/slab.h>
> +#include <sound/pcm.h>
> +#include <sound/pcm_params.h>
> +#include <sound/soc.h>
> +#include <sound/jack.h>
> +#include "../../codecs/rt5645.h"
> +
> +#include "../common/sst-dsp.h"
> +
> +static const struct snd_soc_dapm_widget byt_rt5645_widgets[] = {
> + SND_SOC_DAPM_HP("Headphone", NULL),
> + SND_SOC_DAPM_MIC("Headset Mic", NULL),
> + SND_SOC_DAPM_MIC("Internal Mic", NULL),
> + SND_SOC_DAPM_SPK("Speaker", NULL),
> +};
> +
> +static const struct snd_soc_dapm_route byt_rt5645_audio_map[] = {
> + {"Headset Mic", NULL, "MICBIAS1"},
> + {"IN2P", NULL, "Headset Mic"},
> + {"Headphone", NULL, "HPOL"},
> + {"Headphone", NULL, "HPOR"},
> + {"Speaker", NULL, "SPOLP"},
> + {"Speaker", NULL, "SPOLN"},
> + {"Speaker", NULL, "SPORP"},
> + {"Speaker", NULL, "SPORN"},
> +};
> +
> +static const struct snd_soc_dapm_route byt_rt5645_intmic_dmic1_map[] = {
> + {"DMIC1", NULL, "Internal Mic"},
> +};
> +
> +static const struct snd_soc_dapm_route byt_rt5645_intmic_dmic2_map[] = {
> + {"DMIC2", NULL, "Internal Mic"},
> +};
> +
> +static const struct snd_soc_dapm_route byt_rt5645_intmic_in1_map[] = {
> + {"Internal Mic", NULL, "MICBIAS1"},
> + {"IN1P", NULL, "Internal Mic"},
> +};
> +
> +enum {
> + BYT_RT5645_DMIC1_MAP,
> + BYT_RT5645_DMIC2_MAP,
> + BYT_RT5645_IN1_MAP,
> +};
> +
> +#define BYT_RT5645_MAP(quirk) ((quirk) & 0xff)
> +#define BYT_RT5645_DMIC_EN BIT(16)
> +
> +static unsigned long byt_rt5645_quirk = BYT_RT5645_DMIC1_MAP |
> + BYT_RT5645_DMIC_EN;
> +
> +static const struct snd_kcontrol_new byt_rt5645_controls[] = {
> + SOC_DAPM_PIN_SWITCH("Headphone"),
> + SOC_DAPM_PIN_SWITCH("Headset Mic"),
> + SOC_DAPM_PIN_SWITCH("Internal Mic"),
> + SOC_DAPM_PIN_SWITCH("Speaker"),
> +};
> +
> +static int byt_rt5645_hw_params(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params)
> +{
> + struct snd_soc_pcm_runtime *rtd = substream->private_data;
> + struct snd_soc_dai *codec_dai = rtd->codec_dai;
> + int ret;
> +
> + ret = snd_soc_dai_set_sysclk(codec_dai, RT5645_SCLK_S_PLL1,
> + params_rate(params) * 256,
> + SND_SOC_CLOCK_IN);
> + if (ret < 0) {
> + dev_err(codec_dai->dev, "can't set codec clock %d\n", ret);
> + return ret;
> + }
> + ret = snd_soc_dai_set_pll(codec_dai, 0, RT5645_PLL1_S_BCLK1,
> + params_rate(params) * 64,
> + params_rate(params) * 256);
> + if (ret < 0) {
> + dev_err(codec_dai->dev, "can't set codec pll: %d\n", ret);
> + return ret;
> + }
> + return 0;
> +}
> +
> +static int byt_rt5645_quirk_cb(const struct dmi_system_id *id)
> +{
> + byt_rt5645_quirk = (unsigned long)id->driver_data;
> + return 1;
> +}
> +
> +static const struct dmi_system_id byt_rt5645_quirk_table[] = {
> + {
> + .callback = byt_rt5645_quirk_cb,
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "X205TA"),
> + },
> + .driver_data = (unsigned long *)BYT_RT5645_IN1_MAP,
> + },
> + {
> + .callback = byt_rt5645_quirk_cb,
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "DellInc."),
> + DMI_MATCH(DMI_PRODUCT_NAME, "Venue 8 Pro 5830"),
> + },
> + .driver_data = (unsigned long *)(BYT_RT5645_DMIC2_MAP |
> + BYT_RT5645_DMIC_EN),
> + },
> + {}
> +};
> +
> +static int byt_rt5645_init(struct snd_soc_pcm_runtime *runtime)
> +{
> + int ret;
> + struct snd_soc_card *card = runtime->card;
> + const struct snd_soc_dapm_route *custom_map;
> + int num_routes;
> +
> + card->dapm.idle_bias_off = true;
> +
> + ret = snd_soc_add_card_controls(card, byt_rt5645_controls,
> + ARRAY_SIZE(byt_rt5645_controls));
> + if (ret) {
> + dev_err(card->dev, "unable to add card controls\n");
> + return ret;
> + }
> +
> + dmi_check_system(byt_rt5645_quirk_table);
> + switch (BYT_RT5645_MAP(byt_rt5645_quirk)) {
> + case BYT_RT5645_IN1_MAP:
> + custom_map = byt_rt5645_intmic_in1_map;
> + num_routes = ARRAY_SIZE(byt_rt5645_intmic_in1_map);
> + break;
> + case BYT_RT5645_DMIC2_MAP:
> + custom_map = byt_rt5645_intmic_dmic2_map;
> + num_routes = ARRAY_SIZE(byt_rt5645_intmic_dmic2_map);
> + break;
> + default:
> + custom_map = byt_rt5645_intmic_dmic1_map;
> + num_routes = ARRAY_SIZE(byt_rt5645_intmic_dmic1_map);
> + }
> +
> + ret = snd_soc_dapm_add_routes(&card->dapm, custom_map, num_routes);
> + if (ret)
> + return ret;
> +
> + snd_soc_dapm_ignore_suspend(&card->dapm, "Headphone");
> + snd_soc_dapm_ignore_suspend(&card->dapm, "Speaker");
> +
> + return ret;
> +}
> +
> +static struct snd_soc_ops byt_rt5645_ops = {
> + .hw_params = byt_rt5645_hw_params,
> +};
> +
> +static struct snd_soc_dai_link byt_rt5645_dais[] = {
> + {
> + .name = "Baytrail Audio",
> + .stream_name = "Audio",
> + .cpu_dai_name = "baytrail-pcm-audio",
> + .codec_dai_name = "rt5645-aif1",
> + .codec_name = "i2c-10EC56458:00",
> + .platform_name = "baytrail-pcm-audio",
> + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
> + SND_SOC_DAIFMT_CBS_CFS,
> + .init = byt_rt5645_init,
> + .ops = &byt_rt5645_ops,
> + },
> +};
> +
> +static struct snd_soc_card byt_rt5645_card = {
> + .name = "byt-rt5645",
> + .dai_link = byt_rt5645_dais,
> + .num_links = ARRAY_SIZE(byt_rt5645_dais),
> + .dapm_widgets = byt_rt5645_widgets,
> + .num_dapm_widgets = ARRAY_SIZE(byt_rt5645_widgets),
> + .dapm_routes = byt_rt5645_audio_map,
> + .num_dapm_routes = ARRAY_SIZE(byt_rt5645_audio_map),
> + .fully_routed = true,
> +};
> +
> +static int byt_rt5645_probe(struct platform_device *pdev)
> +{
> + struct snd_soc_card *card = &byt_rt5645_card;
> +
> + card->dev = &pdev->dev;
> + return devm_snd_soc_register_card(&pdev->dev, card);
> +}
> +
> +static struct platform_driver byt_rt5645_audio = {
> + .probe = byt_rt5645_probe,
> + .driver = {
> + .name = "byt-rt5645",
> + .pm = &snd_soc_pm_ops,
> + },
> +};
> +module_platform_driver(byt_rt5645_audio)
> +
> +MODULE_DESCRIPTION("ASoC Intel(R) Baytrail Machine driver");
> +MODULE_AUTHOR("Omair Md Abdullah, Jarkko Nikula");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:byt-rt5645");
> diff --git a/sound/soc/intel/common/sst-acpi.c b/sound/soc/intel/common/sst-acpi.c
> index 42f293f..bb28e84 100644
> --- a/sound/soc/intel/common/sst-acpi.c
> +++ b/sound/soc/intel/common/sst-acpi.c
> @@ -248,6 +248,7 @@ static struct sst_acpi_desc sst_acpi_broadwell_desc = {
>
> static struct sst_acpi_mach baytrail_machines[] = {
> { "10EC5640", "byt-rt5640", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
> + { "10EC5648", "byt-rt5645", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
> { "193C9890", "byt-max98090", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
> {}
> };
> --
> 2.4.1
>
>
> _______________________________________________
> Alsa-devel mailing list
> Alsa-devel@alsa-project.org
> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
next prev parent reply other threads:[~2015-05-27 6:45 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-21 14:52 writing an alsa driver Michele Curti
2015-05-23 16:32 ` Michele Curti
2015-05-27 6:45 ` Takashi Iwai [this message]
2015-05-27 8:54 ` Michele Curti
2015-05-27 18:41 ` Liam Girdwood
2015-05-27 20:13 ` Michele Curti
2015-05-28 11:31 ` Liam Girdwood
2015-05-28 12:53 ` Michele Curti
2015-05-28 13:21 ` Liam Girdwood
2015-05-28 19:17 ` Michele Curti
2015-05-29 9:42 ` Liam Girdwood
2015-05-29 13:17 ` Michele Curti
2015-06-01 11:06 ` Liam Girdwood
2015-06-04 7:09 ` Marcus Bannerman
2015-06-04 9:04 ` Michele Curti
2015-06-04 8:59 ` Michele Curti
2015-06-04 10:33 ` Liam Girdwood
2015-06-04 17:44 ` Juergen Bausa
2015-06-04 19:39 ` Michele Curti
2015-06-05 7:00 ` Jarkko Nikula
2015-06-08 8:26 ` Michele Curti
2015-06-08 8:49 ` Michele Curti
2015-06-13 13:47 ` Luka Karinja
2015-06-15 16:46 ` Michele Curti
2015-06-15 17:04 ` Liam Girdwood
2015-06-16 20:50 ` Michele Curti
2015-06-17 9:16 ` Liam Girdwood
2015-06-17 21:34 ` Michele Curti
2015-06-18 11:14 ` Vinod Koul
2015-06-18 18:47 ` Michele Curti
2015-06-19 7:54 ` Vinod Koul
2015-06-19 8:12 ` Michele Curti
2015-06-17 6:39 ` Jarkko Nikula
2015-06-23 9:09 ` Michele Curti
2015-06-23 9:51 ` Liam Girdwood
2015-06-24 10:21 ` Vinod Koul
2015-06-24 11:31 ` Antonio Ospite
2015-06-24 11:40 ` Liam Girdwood
2015-06-24 16:04 ` Vinod Koul
2015-06-24 18:21 ` Michele Curti
2015-06-25 3:24 ` Vinod Koul
2015-06-25 7:39 ` Michele Curti
2016-03-03 11:11 ` Michele Curti
2016-03-03 11:27 ` Vinod Koul
2016-03-03 13:08 ` Michele Curti
2016-03-03 16:20 ` Pierre-Louis Bossart
2016-03-04 11:07 ` Michele Curti
2015-07-22 20:05 Marco Bodega
2015-07-24 20:54 ` Michele Curti
2015-08-10 14:12 Johnny
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=s5h7fruecx4.wl-tiwai@suse.de \
--to=tiwai@suse.de \
--cc=alsa-devel@alsa-project.org \
--cc=michele.curti@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.