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Message-ID: <6c9d9c3e-3ea4-cf91-aebf-a0b30447e42e@linaro.org>
Date: Tue, 23 Nov 2021 12:28:56 +0000
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
rohitkr@...eaurora.org, linux-arm-msm@...r.kernel.org,
alsa-devel@...a-project.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, swboyd@...omium.org,
judyhsiao@...omium.org
Cc: Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: Re: [PATCH v5 09/10] ASoC: qcom: lpass-sc7280: Add platform driver
for lpass audio
On 22/11/2021 11:46, Srinivasa Rao Mandadapu wrote:
> Add platform driver for configuring sc7280 lpass core I2S and
> DMA configuration to support playback & capture to external codecs
> connected over secondary MI2S interface and soundwire interface.
>
> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@...eaurora.org>
> Co-developed-by: Venkata Prasad Potturu <potturu@...eaurora.org>
> Signed-off-by: Venkata Prasad Potturu <potturu@...eaurora.org>
> ---
> sound/soc/qcom/lpass-sc7280.c | 416 ++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 416 insertions(+)
> create mode 100644 sound/soc/qcom/lpass-sc7280.c
>
> diff --git a/sound/soc/qcom/lpass-sc7280.c b/sound/soc/qcom/lpass-sc7280.c
> new file mode 100644
> index 0000000..20ad3ee
> --- /dev/null
> +++ b/sound/soc/qcom/lpass-sc7280.c
> @@ -0,0 +1,416 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
> + *
> + * lpass-sc7180.c -- ALSA SoC platform-machine driver for QTi LPASS
> + */
> +
> +#include <linux/module.h>
> +#include <sound/pcm.h>
> +#include <sound/soc.h>
> +#include <linux/pm_domain.h>
?? do you really use this
> +#include <linux/pm_runtime.h>
> +
> +#include <dt-bindings/sound/sc7180-lpass.h>
> +
> +#include "lpass-lpaif-reg.h"
> +#include "lpass.h"
> +
> +static struct snd_soc_dai_driver sc7280_lpass_cpu_dai_driver[] = {
> + {
> + .id = LPASS_CDC_DMA_RX0,
> + .name = "CDC DMA RX",
> + .playback = {
> + .stream_name = "WCD Playback",
> + .formats = SNDRV_PCM_FMTBIT_S16,
indentation is changing for every field, can we be consistent.
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
> + .channels_min = 2,
> + .channels_max = 2,
> + },
> + .ops = &asoc_qcom_lpass_wcd_dai_ops,
> + },
> + {
> + .id = LPASS_CDC_DMA_TX3,
> + .name = "CDC DMA TX",
> + .capture = {
> + .stream_name = "WCD Capture",
> + .formats = SNDRV_PCM_FMTBIT_S16,
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
> + .channels_min = 1,
> + .channels_max = 2,
> + },
> + .ops = &asoc_qcom_lpass_wcd_dai_ops,
> + },
> +
> + {
> + .id = MI2S_SECONDARY,
> + .name = "Secondary MI2S",
> + .playback = {
> + .stream_name = "Secondary MI2S Playback",
> + .formats = SNDRV_PCM_FMTBIT_S16,
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
> + .channels_min = 2,
> + .channels_max = 2,
> + },
> + .probe = &asoc_qcom_lpass_cpu_dai_probe,
> + .ops = &asoc_qcom_lpass_cpu_dai_ops,
> + },
> + {
> + .id = LPASS_DP_RX,
> + .name = "Hdmi",
> + .playback = {
> + .stream_name = "DP Playback",
> + .formats = SNDRV_PCM_FMTBIT_S24,
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
> + .channels_min = 2,
> + .channels_max = 2,
> + },
> + .ops = &asoc_qcom_lpass_hdmi_dai_ops,
> + },
> + {
> + .id = LPASS_CDC_DMA_VA_TX0,
> + .name = "CDC DMA VA",
> + .capture = {
> + .stream_name = "DMIC Capture",
> + .formats = SNDRV_PCM_FMTBIT_S16,
> + .rates = SNDRV_PCM_RATE_48000,
> + .rate_min = 48000,
> + .rate_max = 48000,
> + .channels_min = 2,
> + .channels_max = 4,
> + },
> + .ops = &asoc_qcom_lpass_wcd_dai_ops,
> + },
> +};
> +
> +static int sc7280_lpass_alloc_dma_channel(struct lpass_data *drvdata,
> + int direction, unsigned int dai_id)
Same indentation issue.
> +{
> + struct lpass_variant *v = drvdata->variant;
> + int chan = 0;
> +
> + if (dai_id == LPASS_CDC_DMA_RX0 ||
> + dai_id == LPASS_CDC_DMA_TX3) {
this looks very badly indented..
> + if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
> + chan = find_first_zero_bit(&drvdata->rxtx_dma_ch_bit_map,
> + v->rxtx_rdma_channels);
> +
> + if (chan >= v->rxtx_rdma_channels)
> + return -EBUSY;
> + } else {
> + chan = find_next_zero_bit(&drvdata->rxtx_dma_ch_bit_map,
> + v->rxtx_wrdma_channel_start +
> + v->rxtx_wrdma_channels,
> + v->rxtx_wrdma_channel_start);
> +
> + if (chan >= v->rxtx_wrdma_channel_start + v->rxtx_wrdma_channels)
multiple spaces after >=
> + return -EBUSY;
> + }
> +
> + set_bit(chan, &drvdata->rxtx_dma_ch_bit_map);
> + } else if (dai_id == LPASS_CDC_DMA_VA_TX0) {
> + if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
> + chan = find_first_zero_bit(&drvdata->va_dma_ch_bit_map,
> + v->va_rdma_channels);
> +
> + if (chan >= v->va_rdma_channels)
> + return -EBUSY;
> + } else {
> + chan = find_next_zero_bit(&drvdata->va_dma_ch_bit_map,
> + v->va_wrdma_channel_start +
> + v->va_wrdma_channels,
> + v->va_wrdma_channel_start);
> +
> + if (chan >= v->va_wrdma_channel_start + v->va_wrdma_channels)
> + return -EBUSY;
> + }
> +
> + set_bit(chan, &drvdata->va_dma_ch_bit_map);
> + } else if (dai_id == LPASS_DP_RX) {
> + if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
> + chan = find_first_zero_bit(&drvdata->hdmi_dma_ch_bit_map,
> + v->hdmi_rdma_channels);
> +
> + if (chan >= v->hdmi_rdma_channels)
> + return -EBUSY;
> + }
> + set_bit(chan, &drvdata->hdmi_dma_ch_bit_map);
> + } else {
> + if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
> + chan = find_first_zero_bit(&drvdata->dma_ch_bit_map,
> + v->rdma_channels);
> +
> + if (chan >= v->rdma_channels)
> + return -EBUSY;
> + } else {
> + chan = find_next_zero_bit(&drvdata->dma_ch_bit_map,
> + v->wrdma_channel_start +
> + v->wrdma_channels,
> + v->wrdma_channel_start);
> +
> + if (chan >= v->wrdma_channel_start + v->wrdma_channels)
> + return -EBUSY;
> + }
> + set_bit(chan, &drvdata->dma_ch_bit_map);
> + }
> + return chan;
> +}
> +
> +static int sc7280_lpass_free_dma_channel(struct lpass_data *drvdata, int chan, unsigned int dai_id)
> +{
> + if (dai_id == LPASS_CDC_DMA_RX0 ||
> + dai_id == LPASS_CDC_DMA_TX3)
> + clear_bit(chan, &drvdata->rxtx_dma_ch_bit_map);
> + else if (dai_id == LPASS_CDC_DMA_VA_TX0)
> + clear_bit(chan, &drvdata->va_dma_ch_bit_map);
> + else if (dai_id == LPASS_DP_RX)
> + clear_bit(chan, &drvdata->hdmi_dma_ch_bit_map);
> + else
> + clear_bit(chan, &drvdata->dma_ch_bit_map);
better move this to a switch case.
> +
> + return 0;
> +}
> +
> +static int sc7280_lpass_init(struct platform_device *pdev)
> +{
> + struct lpass_data *drvdata = platform_get_drvdata(pdev);
> + struct lpass_variant *variant = drvdata->variant;
> + struct device *dev = &pdev->dev;
> +
> + drvdata->clks = devm_kcalloc(dev, variant->num_clks,
> + sizeof(*drvdata->clks), GFP_KERNEL);
No check on return value ?
> + drvdata->num_clks = variant->num_clks;
> +
> + drvdata->aon_cc_audio_hm_h = devm_clk_get(dev, "lpass_aon_cc_audio_hm_h_clk");
> + if (IS_ERR(drvdata->aon_cc_audio_hm_h))
> + return PTR_ERR(drvdata->aon_cc_audio_hm_h);
> + drvdata->core_cc_sysnoc_mport_core = devm_clk_get(dev,
> + "lpass_core_cc_sysnoc_mport_core_clk");
> + if (IS_ERR(drvdata->core_cc_sysnoc_mport_core))
> + return PTR_ERR(drvdata->core_cc_sysnoc_mport_core);
> +
> + clk_prepare_enable(drvdata->aon_cc_audio_hm_h);
> + clk_prepare_enable(drvdata->core_cc_sysnoc_mport_core);
> + return 0;
> +}
> +
> +static int sc7280_lpass_exit(struct platform_device *pdev)
> +{
> + struct lpass_data *drvdata = platform_get_drvdata(pdev);
> +
> + clk_disable_unprepare(drvdata->core_cc_sysnoc_mport_core);
> + clk_disable_unprepare(drvdata->aon_cc_audio_hm_h);
> +
> + return 0;
> +}
> +
> +static struct lpass_variant sc7280_data = {
> + .i2sctrl_reg_base = 0x1000,
> + .i2sctrl_reg_stride = 0x1000,
> + .i2s_ports = 3,
> + .irq_reg_base = 0x9000,
> + .irq_reg_stride = 0x1000,
> + .irq_ports = 3,
> + .rdma_reg_base = 0xC000,
> + .rdma_reg_stride = 0x1000,
> + .rdma_channels = 5,
> + .rxtx_rdma_reg_base = 0xC000,
> + .rxtx_rdma_reg_stride = 0x1000,
> + .rxtx_rdma_channels = 8,
> + .hdmi_rdma_reg_base = 0x64000,
> + .hdmi_rdma_reg_stride = 0x1000,
> + .hdmi_rdma_channels = 4,
> + .dmactl_audif_start = 1,
> + .wrdma_reg_base = 0x18000,
> + .wrdma_reg_stride = 0x1000,
> + .wrdma_channel_start = 5,
> + .wrdma_channels = 4,
> + .rxtx_irq_reg_base = 0x9000,
> + .rxtx_irq_reg_stride = 0x1000,
> + .rxtx_irq_ports = 3,
> + .rxtx_wrdma_reg_base = 0x18000,
> + .rxtx_wrdma_reg_stride = 0x1000,
> + .rxtx_wrdma_channel_start = 5,
> + .rxtx_wrdma_channels = 6,
> + .va_wrdma_reg_base = 0x18000,
> + .va_wrdma_reg_stride = 0x1000,
> + .va_wrdma_channel_start = 5,
> + .va_wrdma_channels = 3,
> + .va_irq_reg_base = 0x9000,
> + .va_irq_reg_stride = 0x1000,
> + .va_irq_ports = 3,
> +
> + .loopback = REG_FIELD_ID(0x1000, 17, 17, 3, 0x1000),
> + .spken = REG_FIELD_ID(0x1000, 16, 16, 3, 0x1000),
> + .spkmode = REG_FIELD_ID(0x1000, 11, 15, 3, 0x1000),
> + .spkmono = REG_FIELD_ID(0x1000, 10, 10, 3, 0x1000),
> + .micen = REG_FIELD_ID(0x1000, 9, 9, 3, 0x1000),
> + .micmode = REG_FIELD_ID(0x1000, 4, 8, 3, 0x1000),
> + .micmono = REG_FIELD_ID(0x1000, 3, 3, 3, 0x1000),
> + .wssrc = REG_FIELD_ID(0x1000, 2, 2, 3, 0x1000),
> + .bitwidth = REG_FIELD_ID(0x1000, 0, 1, 3, 0x1000),
> +
> + .rdma_dyncclk = REG_FIELD_ID(0xC000, 21, 21, 5, 0x1000),
> + .rdma_bursten = REG_FIELD_ID(0xC000, 20, 20, 5, 0x1000),
> + .rdma_wpscnt = REG_FIELD_ID(0xC000, 16, 19, 5, 0x1000),
> + .rdma_intf = REG_FIELD_ID(0xC000, 12, 15, 5, 0x1000),
> + .rdma_fifowm = REG_FIELD_ID(0xC000, 1, 5, 5, 0x1000),
> + .rdma_enable = REG_FIELD_ID(0xC000, 0, 0, 5, 0x1000),
> +
> + .rxtx_rdma_enable = REG_FIELD_ID(0xC000, 0, 0, 7, 0x1000),
> + .rxtx_rdma_fifowm = REG_FIELD_ID(0xC000, 1, 11, 7, 0x1000),
> + .rxtx_rdma_intf = REG_FIELD_ID(0xC000, 12, 15, 7, 0x1000),
> + .rxtx_rdma_wpscnt = REG_FIELD_ID(0xC000, 16, 19, 7, 0x1000),
> + .rxtx_rdma_bursten = REG_FIELD_ID(0xC000, 20, 20, 7, 0x1000),
> + .rxtx_rdma_dyncclk = REG_FIELD_ID(0xC000, 21, 21, 7, 0x1000),
> +
> + .rxtx_rdma_codec_ch = REG_FIELD_ID(0xC050, 0, 7, 7, 0x1000),
> + .rxtx_rdma_codec_intf = REG_FIELD_ID(0xC050, 16, 19, 7, 0x1000),
> + .rxtx_rdma_codec_fs_delay = REG_FIELD_ID(0xC050, 21, 24, 7, 0x1000),
> + .rxtx_rdma_codec_fs_sel = REG_FIELD_ID(0xC050, 25, 27, 7, 0x1000),
> + .rxtx_rdma_codec_pack = REG_FIELD_ID(0xC050, 29, 29, 5, 0x1000),
> + .rxtx_rdma_codec_enable = REG_FIELD_ID(0xC050, 30, 30, 7, 0x1000),
> +
> + .rxtx_wrdma_enable = REG_FIELD_ID(0x18000, 0, 0, 5, 0x1000),
> + .rxtx_wrdma_fifowm = REG_FIELD_ID(0x18000, 1, 11, 5, 0x1000),
> + .rxtx_wrdma_intf = REG_FIELD_ID(0x18000, 12, 16, 5, 0x1000),
> + .rxtx_wrdma_wpscnt = REG_FIELD_ID(0x18000, 17, 20, 5, 0x1000),
> + .rxtx_wrdma_bursten = REG_FIELD_ID(0x18000, 21, 21, 5, 0x1000),
> + .rxtx_wrdma_dyncclk = REG_FIELD_ID(0x18000, 22, 22, 5, 0x1000),
> +
> + .rxtx_wrdma_codec_ch = REG_FIELD_ID(0x18050, 0, 7, 5, 0x1000),
> + .rxtx_wrdma_codec_intf = REG_FIELD_ID(0x18050, 16, 19, 5, 0x1000),
> + .rxtx_wrdma_codec_fs_delay = REG_FIELD_ID(0x18050, 21, 24, 5, 0x1000),
> + .rxtx_wrdma_codec_fs_sel = REG_FIELD_ID(0x18050, 25, 27, 5, 0x1000),
> + .rxtx_wrdma_codec_pack = REG_FIELD_ID(0x18050, 29, 29, 5, 0x1000),
> + .rxtx_wrdma_codec_enable = REG_FIELD_ID(0x18050, 30, 30, 5, 0x1000),
> +
> + .va_wrdma_enable = REG_FIELD_ID(0x18000, 0, 0, 5, 0x1000),
> + .va_wrdma_fifowm = REG_FIELD_ID(0x18000, 1, 11, 5, 0x1000),
> + .va_wrdma_intf = REG_FIELD_ID(0x18000, 12, 16, 5, 0x1000),
> + .va_wrdma_wpscnt = REG_FIELD_ID(0x18000, 17, 20, 5, 0x1000),
> + .va_wrdma_bursten = REG_FIELD_ID(0x18000, 21, 21, 5, 0x1000),
> + .va_wrdma_dyncclk = REG_FIELD_ID(0x18000, 22, 22, 5, 0x1000),
> +
> + .va_wrdma_codec_ch = REG_FIELD_ID(0x18050, 0, 7, 5, 0x1000),
> + .va_wrdma_codec_intf = REG_FIELD_ID(0x18050, 16, 19, 5, 0x1000),
> + .va_wrdma_codec_fs_delay = REG_FIELD_ID(0x18050, 21, 24, 5, 0x1000),
> + .va_wrdma_codec_fs_sel = REG_FIELD_ID(0x18050, 25, 27, 5, 0x1000),
> + .va_wrdma_codec_pack = REG_FIELD_ID(0x18050, 29, 29, 5, 0x1000),
> + .va_wrdma_codec_enable = REG_FIELD_ID(0x18050, 30, 30, 5, 0x1000),
> +
> + .hdmi_tx_ctl_addr = 0x1000,
> + .hdmi_legacy_addr = 0x1008,
> + .hdmi_vbit_addr = 0x610c0,
> + .hdmi_ch_lsb_addr = 0x61048,
> + .hdmi_ch_msb_addr = 0x6104c,
> + .ch_stride = 0x8,
> + .hdmi_parity_addr = 0x61034,
> + .hdmi_dmactl_addr = 0x61038,
> + .hdmi_dma_stride = 0x4,
> + .hdmi_DP_addr = 0x610c8,
> + .hdmi_sstream_addr = 0x6101c,
> + .hdmi_irq_reg_base = 0x63000,
> + .hdmi_irq_ports = 1,
> +
> + .hdmi_rdma_dyncclk = REG_FIELD_ID(0x64000, 14, 14, 4, 0x1000),
> + .hdmi_rdma_bursten = REG_FIELD_ID(0x64000, 13, 13, 4, 0x1000),
> + .hdmi_rdma_burst8 = REG_FIELD_ID(0x64000, 15, 15, 4, 0x1000),
> + .hdmi_rdma_burst16 = REG_FIELD_ID(0x64000, 16, 16, 4, 0x1000),
> + .hdmi_rdma_dynburst = REG_FIELD_ID(0x64000, 18, 18, 4, 0x1000),
> + .hdmi_rdma_wpscnt = REG_FIELD_ID(0x64000, 10, 12, 4, 0x1000),
> + .hdmi_rdma_fifowm = REG_FIELD_ID(0x64000, 1, 5, 4, 0x1000),
> + .hdmi_rdma_enable = REG_FIELD_ID(0x64000, 0, 0, 4, 0x1000),
> +
> + .sstream_en = REG_FIELD(0x6101c, 0, 0),
> + .dma_sel = REG_FIELD(0x6101c, 1, 2),
> + .auto_bbit_en = REG_FIELD(0x6101c, 3, 3),
> + .layout = REG_FIELD(0x6101c, 4, 4),
> + .layout_sp = REG_FIELD(0x6101c, 5, 8),
> + .set_sp_on_en = REG_FIELD(0x6101c, 10, 10),
> + .dp_audio = REG_FIELD(0x6101c, 11, 11),
> + .dp_staffing_en = REG_FIELD(0x6101c, 12, 12),
> + .dp_sp_b_hw_en = REG_FIELD(0x6101c, 13, 13),
> +
> + .mute = REG_FIELD(0x610c8, 0, 0),
> + .as_sdp_cc = REG_FIELD(0x610c8, 1, 3),
> + .as_sdp_ct = REG_FIELD(0x610c8, 4, 7),
> + .aif_db4 = REG_FIELD(0x610c8, 8, 15),
> + .frequency = REG_FIELD(0x610c8, 16, 21),
> + .mst_index = REG_FIELD(0x610c8, 28, 29),
> + .dptx_index = REG_FIELD(0x610c8, 30, 31),
> +
> + .soft_reset = REG_FIELD(0x1000, 31, 31),
> + .force_reset = REG_FIELD(0x1000, 30, 30),
> +
> + .use_hw_chs = REG_FIELD(0x61038, 0, 0),
> + .use_hw_usr = REG_FIELD(0x61038, 1, 1),
> + .hw_chs_sel = REG_FIELD(0x61038, 2, 4),
> + .hw_usr_sel = REG_FIELD(0x61038, 5, 6),
> +
> + .replace_vbit = REG_FIELD(0x610c0, 0, 0),
> + .vbit_stream = REG_FIELD(0x610c0, 1, 1),
> +
> + .legacy_en = REG_FIELD(0x1008, 0, 0),
> + .calc_en = REG_FIELD(0x61034, 0, 0),
> + .lsb_bits = REG_FIELD(0x61048, 0, 31),
> + .msb_bits = REG_FIELD(0x6104c, 0, 31),
> +
> +
> + .clk_name = (const char*[]) {
> + "lpass_aon_cc_audio_hm_h_clk",
> + "lpass_core_cc_sysnoc_mport_core_clk"
> + },
> + .num_clks = 2,
> + .cdc_dma_clk_names = (const char*[]) {
> + "lpass_audio_cc_codec_mem0_clk",
> + "lpass_audio_cc_codec_mem1_clk",
> + "lpass_audio_cc_codec_mem2_clk",
> + "lpass_aon_cc_va_mem0_clk"
> + },
> + .cdc_dma_num_clks = 4,
> + .dai_driver = sc7280_lpass_cpu_dai_driver,
> + .num_dai = ARRAY_SIZE(sc7280_lpass_cpu_dai_driver),
> + .dai_osr_clk_names = (const char *[]) {
> + "null",
> + "null"
> + },
> + .dai_bit_clk_names = (const char *[]) {
> + "null",
> + "lpass_core_cc_ext_if0_ibit_clk",
> + "lpass_core_cc_ext_if1_ibit_clk"
> + },
> + .init = sc7280_lpass_init,
> + .exit = sc7280_lpass_exit,
> + .alloc_dma_channel = sc7280_lpass_alloc_dma_channel,
> + .free_dma_channel = sc7280_lpass_free_dma_channel,
> +};
> +
> +static const struct of_device_id sc7280_lpass_cpu_device_id[] = {
> + {.compatible = "qcom,sc7280-lpass-cpu", .data = &sc7280_data},
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, sc7280_lpass_cpu_device_id);
> +
> +static struct platform_driver sc7280_lpass_cpu_platform_driver = {
> + .driver = {
> + .name = "sc7280-lpass-cpu",
> + .of_match_table = of_match_ptr(sc7280_lpass_cpu_device_id),
> + },
> + .probe = asoc_qcom_lpass_cpu_platform_probe,
> + .remove = asoc_qcom_lpass_cpu_platform_remove,
> + .shutdown = asoc_qcom_lpass_cpu_platform_shutdown,
> +};
> +
> +module_platform_driver(sc7280_lpass_cpu_platform_driver);
> +
> +MODULE_DESCRIPTION("SC7280 LPASS CPU DRIVER");
> +MODULE_LICENSE("GPL v2");
use "GPL"
--srini
>
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