November 2019 - Alsa-devel - mailman.alsa-project.org

[alsa-devel] [PATCH] ASoC: rt5682: fix i2c arbitration lost issue
by shumingf＠realtek.com 28 Nov '19

28 Nov '19

From: Shuming Fan <shumingf(a)realtek.com> This patch modified the HW initial setting to fix i2c arbitration lost issue. Signed-off-by: Shuming Fan <shumingf(a)realtek.com> --- sound/soc/codecs/rt5682.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sound/soc/codecs/rt5682.c b/sound/soc/codecs/rt5682.c index b1713fffa3eb..ae6f6121bc1b 100644 --- a/sound/soc/codecs/rt5682.c +++ b/sound/soc/codecs/rt5682.c @@ -73,6 +73,7 @@ struct rt5682_priv { static const struct reg_sequence patch_list[] = { {RT5682_HP_IMP_SENS_CTRL_19, 0x1000}, {RT5682_DAC_ADC_DIG_VOL1, 0xa020}, + {RT5682_I2C_CTRL, 0x000f}, }; static const struct reg_default rt5682_reg[] = { @@ -2474,6 +2475,7 @@ static void rt5682_calibrate(struct rt5682_priv *rt5682) mutex_lock(&rt5682->calibrate_mutex); rt5682_reset(rt5682->regmap); + regmap_write(rt5682->regmap, RT5682_I2C_CTRL, 0x000f); regmap_write(rt5682->regmap, RT5682_PWR_ANLG_1, 0xa2af); usleep_range(15000, 20000); regmap_write(rt5682->regmap, RT5682_PWR_ANLG_1, 0xf2af); -- 2.24.0

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[alsa-devel] [PATCH] ASoC: AMD: Enable clk in startup intead of hw_params
by Yu-Hsuan Hsu 28 Nov '19

28 Nov '19

Some usages only call startup and shutdown without setting hw_params (e.g. arecord --dump-hw-params). If we don't enable clk in startup, it will cause ref count error because the clk will be disabled in shutdown. For this reason, we should move enabling clk from hw_params to startup. In addition, the hw_params is fixed in this driver(48000 rate, 2 channels, S16_LE format) so we don't need to change the clk rate after the hw_params is set. Signed-off-by: Yu-Hsuan Hsu <yuhsuan(a)chromium.org> --- sound/soc/amd/acp-da7219-max98357a.c | 46 +++++++++------------------- 1 file changed, 14 insertions(+), 32 deletions(-) diff --git a/sound/soc/amd/acp-da7219-max98357a.c b/sound/soc/amd/acp-da7219-max98357a.c index f4ee6798154af5..7a5621e5e2330d 100644 --- a/sound/soc/amd/acp-da7219-max98357a.c +++ b/sound/soc/amd/acp-da7219-max98357a.c @@ -96,14 +96,19 @@ static int cz_da7219_init(struct snd_soc_pcm_runtime *rtd) return 0; } -static int da7219_clk_enable(struct snd_pcm_substream *substream, - int wclk_rate, int bclk_rate) +static int da7219_clk_enable(struct snd_pcm_substream *substream) { int ret = 0; struct snd_soc_pcm_runtime *rtd = substream->private_data; - clk_set_rate(da7219_dai_wclk, wclk_rate); - clk_set_rate(da7219_dai_bclk, bclk_rate); + /* + * Set wclk to 48000 because the rate constraint of this driver is + * 48000. ADAU7002 spec: "The ADAU7002 requires a BCLK rate that is + * minimum of 64x the LRCLK sample rate." DA7219 is the only clk + * source so for all codecs we have to limit bclk to 64X lrclk. + */ + clk_set_rate(da7219_dai_wclk, 48000); + clk_set_rate(da7219_dai_bclk, 48000 * 64); ret = clk_prepare_enable(da7219_dai_bclk); if (ret < 0) { dev_err(rtd->dev, "can't enable master clock %d\n", ret); @@ -156,7 +161,7 @@ static int cz_da7219_play_startup(struct snd_pcm_substream *substream) &constraints_rates); machine->play_i2s_instance = I2S_SP_INSTANCE; - return 0; + return da7219_clk_enable(substream); } static int cz_da7219_cap_startup(struct snd_pcm_substream *substream) @@ -178,7 +183,7 @@ static int cz_da7219_cap_startup(struct snd_pcm_substream *substream) machine->cap_i2s_instance = I2S_SP_INSTANCE; machine->capture_channel = CAP_CHANNEL1; - return 0; + return da7219_clk_enable(substream); } static int cz_max_startup(struct snd_pcm_substream *substream) @@ -199,7 +204,7 @@ static int cz_max_startup(struct snd_pcm_substream *substream) &constraints_rates); machine->play_i2s_instance = I2S_BT_INSTANCE; - return 0; + return da7219_clk_enable(substream); } static int cz_dmic0_startup(struct snd_pcm_substream *substream) @@ -220,7 +225,7 @@ static int cz_dmic0_startup(struct snd_pcm_substream *substream) &constraints_rates); machine->cap_i2s_instance = I2S_BT_INSTANCE; - return 0; + return da7219_clk_enable(substream); } static int cz_dmic1_startup(struct snd_pcm_substream *substream) @@ -242,25 +247,7 @@ static int cz_dmic1_startup(struct snd_pcm_substream *substream) machine->cap_i2s_instance = I2S_SP_INSTANCE; machine->capture_channel = CAP_CHANNEL0; - return 0; -} - -static int cz_da7219_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) -{ - int wclk, bclk; - - wclk = params_rate(params); - bclk = wclk * params_channels(params) * - snd_pcm_format_width(params_format(params)); - /* ADAU7002 spec: "The ADAU7002 requires a BCLK rate - * that is minimum of 64x the LRCLK sample rate." - * DA7219 is the only clk source so for all codecs - * we have to limit bclk to 64X lrclk. - */ - if (bclk < (wclk * 64)) - bclk = wclk * 64; - return da7219_clk_enable(substream, wclk, bclk); + return da7219_clk_enable(substream); } static void cz_da7219_shutdown(struct snd_pcm_substream *substream) @@ -271,31 +258,26 @@ static void cz_da7219_shutdown(struct snd_pcm_substream *substream) static const struct snd_soc_ops cz_da7219_play_ops = { .startup = cz_da7219_play_startup, .shutdown = cz_da7219_shutdown, - .hw_params = cz_da7219_params, }; static const struct snd_soc_ops cz_da7219_cap_ops = { .startup = cz_da7219_cap_startup, .shutdown = cz_da7219_shutdown, - .hw_params = cz_da7219_params, }; static const struct snd_soc_ops cz_max_play_ops = { .startup = cz_max_startup, .shutdown = cz_da7219_shutdown, - .hw_params = cz_da7219_params, }; static const struct snd_soc_ops cz_dmic0_cap_ops = { .startup = cz_dmic0_startup, .shutdown = cz_da7219_shutdown, - .hw_params = cz_da7219_params, }; static const struct snd_soc_ops cz_dmic1_cap_ops = { .startup = cz_dmic1_startup, .shutdown = cz_da7219_shutdown, - .hw_params = cz_da7219_params, }; SND_SOC_DAILINK_DEF(designware1, -- 2.24.0.432.g9d3f5f5b63-goog

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[alsa-devel] [PATCH] ASoC: SOF: Intel: BYT: fix a copy/paste mistake in byt_dump()
by Pierre-Louis Bossart 28 Nov '19

28 Nov '19

From: Keyon Jie <yang.jie(a)linux.intel.com> The shim registers in BYT/CHT/BSW are 64bits based, correct the copy/paste (from bdw.c where the shim registers are 32bits based) error in byt_dump(). Fixes: 3a9e204d4e36 ("ASoC: SOF: Intel: Add context data to any IPC timeout") Signed-off-by: Keyon Jie <yang.jie(a)linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> --- sound/soc/sof/intel/byt.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/sound/soc/sof/intel/byt.c b/sound/soc/sof/intel/byt.c index 2abf80b3eb52..b9061b79a57b 100644 --- a/sound/soc/sof/intel/byt.c +++ b/sound/soc/sof/intel/byt.c @@ -145,33 +145,33 @@ static void byt_dump(struct snd_sof_dev *sdev, u32 flags) struct sof_ipc_dsp_oops_xtensa xoops; struct sof_ipc_panic_info panic_info; u32 stack[BYT_STACK_DUMP_SIZE]; - u32 status, panic, imrd, imrx; + u64 status, panic, imrd, imrx; /* now try generic SOF status messages */ - status = snd_sof_dsp_read(sdev, BYT_DSP_BAR, SHIM_IPCD); - panic = snd_sof_dsp_read(sdev, BYT_DSP_BAR, SHIM_IPCX); + status = snd_sof_dsp_read64(sdev, BYT_DSP_BAR, SHIM_IPCD); + panic = snd_sof_dsp_read64(sdev, BYT_DSP_BAR, SHIM_IPCX); byt_get_registers(sdev, &xoops, &panic_info, stack, BYT_STACK_DUMP_SIZE); snd_sof_get_status(sdev, status, panic, &xoops, &panic_info, stack, BYT_STACK_DUMP_SIZE); /* provide some context for firmware debug */ - imrx = snd_sof_dsp_read(sdev, BYT_DSP_BAR, SHIM_IMRX); - imrd = snd_sof_dsp_read(sdev, BYT_DSP_BAR, SHIM_IMRD); + imrx = snd_sof_dsp_read64(sdev, BYT_DSP_BAR, SHIM_IMRX); + imrd = snd_sof_dsp_read64(sdev, BYT_DSP_BAR, SHIM_IMRD); dev_err(sdev->dev, - "error: ipc host -> DSP: pending %s complete %s raw 0x%8.8x\n", + "error: ipc host -> DSP: pending %s complete %s raw 0x%llx\n", (panic & SHIM_IPCX_BUSY) ? "yes" : "no", (panic & SHIM_IPCX_DONE) ? "yes" : "no", panic); dev_err(sdev->dev, - "error: mask host: pending %s complete %s raw 0x%8.8x\n", + "error: mask host: pending %s complete %s raw 0x%llx\n", (imrx & SHIM_IMRX_BUSY) ? "yes" : "no", (imrx & SHIM_IMRX_DONE) ? "yes" : "no", imrx); dev_err(sdev->dev, - "error: ipc DSP -> host: pending %s complete %s raw 0x%8.8x\n", + "error: ipc DSP -> host: pending %s complete %s raw 0x%llx\n", (status & SHIM_IPCD_BUSY) ? "yes" : "no", (status & SHIM_IPCD_DONE) ? "yes" : "no", status); dev_err(sdev->dev, - "error: mask DSP: pending %s complete %s raw 0x%8.8x\n", + "error: mask DSP: pending %s complete %s raw 0x%llx\n", (imrd & SHIM_IMRD_BUSY) ? "yes" : "no", (imrd & SHIM_IMRD_DONE) ? "yes" : "no", imrd); -- 2.20.1

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[alsa-devel] [PATCH] ASoC: SOF: topology: Fix unload for SAI/ESAI
by Pierre-Louis Bossart 28 Nov '19

28 Nov '19

From: Daniel Baluta <daniel.baluta(a)nxp.com> Link unload now fails for ESAI/SAI DAIs with: "error: invalid DAI type 6" because DAI type is not properly handled. Fix this by correctly handling cases where type is ESAI or SAI. Fixes: a4eff5f86c9c5e7 ("ASoC: SOF: imx: Read ESAI parameters and send them to DSP") Signed-off-by: Daniel Baluta <daniel.baluta(a)nxp.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart(a)linux.intel.com> --- sound/soc/sof/topology.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/soc/sof/topology.c b/sound/soc/sof/topology.c index d82ab981e840..e20b806ec80f 100644 --- a/sound/soc/sof/topology.c +++ b/sound/soc/sof/topology.c @@ -3132,7 +3132,9 @@ static int sof_link_unload(struct snd_soc_component *scomp, case SOF_DAI_INTEL_SSP: case SOF_DAI_INTEL_DMIC: case SOF_DAI_INTEL_ALH: - /* no resource needs to be released for SSP, DMIC and ALH */ + case SOF_DAI_IMX_SAI: + case SOF_DAI_IMX_ESAI: + /* no resource needs to be released for all cases above */ break; case SOF_DAI_INTEL_HDA: ret = sof_link_hda_unload(sdev, link); -- 2.20.1

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[alsa-devel] [PATCH -next] ASoC: rt5677: Fix build error without CONFIG_SPI
by YueHaibing 28 Nov '19

28 Nov '19

If CONFIG_SPI is n, SND_SOC_RT5677_SPI also is n, building fails: sound/soc/codecs/rt5677.o: In function `rt5677_irq': rt5677.c:(.text+0x2dbf): undefined reference to `rt5677_spi_hotword_detected' sound/soc/codecs/rt5677.o: In function `rt5677_dsp_work': rt5677.c:(.text+0x3709): undefined reference to `rt5677_spi_write' This adds stub helpers to fix this. Reported-by: Hulk Robot <hulkci(a)huawei.com> Fixes: 461c623270e4 ("ASoC: rt5677: Load firmware via SPI using delayed work") Signed-off-by: YueHaibing <yuehaibing(a)huawei.com> --- sound/soc/codecs/rt5677-spi.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/sound/soc/codecs/rt5677-spi.h b/sound/soc/codecs/rt5677-spi.h index 3af36ec..088b779 100644 --- a/sound/soc/codecs/rt5677-spi.h +++ b/sound/soc/codecs/rt5677-spi.h @@ -9,9 +9,25 @@ #ifndef __RT5677_SPI_H__ #define __RT5677_SPI_H__ +#if IS_ENABLED(CONFIG_SND_SOC_RT5677_SPI) int rt5677_spi_read(u32 addr, void *rxbuf, size_t len); int rt5677_spi_write(u32 addr, const void *txbuf, size_t len); int rt5677_spi_write_firmware(u32 addr, const struct firmware *fw); void rt5677_spi_hotword_detected(void); +#else +static inline int rt5677_spi_read(u32 addr, void *rxbuf, size_t len) +{ + return -EINVAL; +} +static inline int rt5677_spi_write(u32 addr, const void *txbuf, size_t len) +{ + return -EINVAL; +} +static inline int rt5677_spi_write_firmware(u32 addr, const struct firmware *fw) +{ + return -EINVAL; +} +static inline void rt5677_spi_hotword_detected(void){} +#endif #endif /* __RT5677_SPI_H__ */ -- 2.7.4

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[alsa-devel] [PATCH] ASoC: wm8904: fix automatic sysclk configuration
by Michael Walle 28 Nov '19

28 Nov '19

The simple-card tries to signal the codec to disable rate constraints, see commit 2458adb8f92a ("SoC: simple-card-utils: set 0Hz to sysclk when shutdown"). This wasn't handled by the codec, instead it would set the FLL frequency to 0Hz which isn't working. Since we don't have any rate constraints just ignore this request. Fixes: 13409d27cb39 ("ASoC: wm8904: configure sysclk/FLL automatically") Signed-off-by: Michael Walle <michael(a)walle.cc> --- sound/soc/codecs/wm8904.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c index 7d7ea15d73e0..5ffbaddd6e49 100644 --- a/sound/soc/codecs/wm8904.c +++ b/sound/soc/codecs/wm8904.c @@ -1806,6 +1806,12 @@ static int wm8904_set_sysclk(struct snd_soc_dai *dai, int clk_id, switch (clk_id) { case WM8904_CLK_AUTO: + /* We don't have any rate constraints, so just ignore the + * request to disable constraining. + */ + if (!freq) + return 0; + mclk_freq = clk_get_rate(priv->mclk); /* enable FLL if a different sysclk is desired */ if (mclk_freq != freq) { -- 2.20.1

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[alsa-devel] [PATCH v2 0/3] ASoC: max98090: fix PLL unlocked workaround-related
by Tzung-Bi Shih 28 Nov '19

28 Nov '19

This series is a follow up fix for the question: https://mailman.alsa-project.org/pipermail/alsa-devel/2019-October/157364.h… Changes from v1: ASoC: max98090: remove msleep in PLL unlocked workaround - add more comments https://mailman.alsa-project.org/pipermail/alsa-devel/2019-November/158969.… ASoC: max98090: exit workaround earlier if PLL is locked - "sleep first and then check the status" https://mailman.alsa-project.org/pipermail/alsa-devel/2019-November/158998.… ASoC: max98090: fix possible race conditions - fix typo https://mailman.alsa-project.org/pipermail/alsa-devel/2019-November/158966.… - add more descriptions in commit message Tzung-Bi Shih (3): ASoC: max98090: remove msleep in PLL unlocked workaround ASoC: max98090: exit workaround earlier if PLL is locked ASoC: max98090: fix possible race conditions sound/soc/codecs/max98090.c | 30 +++++++++++++++++++++--------- sound/soc/codecs/max98090.h | 1 - 2 files changed, 21 insertions(+), 10 deletions(-) -- 2.24.0.432.g9d3f5f5b63-goog

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[alsa-devel] [PATCHv2 0/6] ASoC: da7213: support for usage with simple-card
by Sebastian Reichel 28 Nov '19

28 Nov '19

Hi, This extends the da7213 driver to be used with simple-audio-card in combination with a fixed clock. Here is a snippet of the downstream board's DT, that is supposed to be supported by this patchset. --------------------------------------------------------------------- / { sound { compatible = "simple-audio-card"; simple-audio-card,name = "audio-card"; simple-audio-card,format = "i2s"; simple-audio-card,bitclock-master = <&dailink_master>; simple-audio-card,frame-master = <&dailink_master>; simple-audio-card,widgets = "Speaker", "Ext Spk"; simple-audio-card,audio-routing = "Ext Spk", "LINE"; simple-audio-card,cpu { sound-dai = <&ssi1>; }; dailink_master: simple-audio-card,codec { sound-dai = <&codec>; }; }; clk_ext_audio_codec: clock-codec { compatible = "fixed-clock"; #clock-cells = <0>; clock-frequency = <12288000>; }; }; &i2c1 { codec: audio-codec@1a { compatible = "dlg,da7212"; reg = <0x1a>; #sound-dai-cells = <0>; VDDA-supply = <&reg_2v5_audio>; VDDSP-supply = <&reg_5v0_audio>; VDDMIC-supply = <&reg_3v3_audio>; VDDIO-supply = <&reg_3v3_audio>; clocks = <&clk_ext_audio_codec>; clock-names = "mclk"; }; }; --------------------------------------------------------------------- Changes since PATCHv1: * https://lore.kernel.org/alsa-devel/20191108174843.11227-1-sebastian.reichel… * add patch adding da7212 compatible to DT bindings * update regulator patch, so that VDDA is enabled together with VDDIO while the device is enabled to avoid device reset * update clock patch, so that automatic PLL handling is not enabled when PLL is configured manually * update clock patch, so that automatic PLL is disabled when the device is suspended * update clock patch, so that automatic PLL is configured into bypass mode when possible -- Sebastian Sebastian Reichel (6): ASoC: da7213: Add da7212 DT compatible ASoC: da7213: Add regulator support ASoC: da7213: Provide selectable option ASoC: da7213: Move set_sysclk to codec level ASoC: da7213: Move set_pll to codec level ASoC: da7213: Add default clock handling .../devicetree/bindings/sound/da7213.txt | 8 +- sound/soc/codecs/Kconfig | 3 +- sound/soc/codecs/da7213.c | 171 ++++++++++++++++-- sound/soc/codecs/da7213.h | 11 ++ 4 files changed, 177 insertions(+), 16 deletions(-) -- 2.24.0

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[alsa-devel] Dell headphone has noise on unmute state for ALC236
by Kailang 28 Nov '19

28 Nov '19

Hi Takashi, headphone have noise even the volume is very small. Let it fill up pcbeep hidden register to default value. The issue was gone. The patch as attach file. Many thanks. BR, Kailang

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[alsa-devel] [PATCH v3] ALSA: hda: hdmi - fix regression in connect list handling
by Kai Vehmanen 28 Nov '19

28 Nov '19

Fix regression in how intel_haswell_fixup_connect_list() results are used in hda_read_pin_conn(). Use of snd_hda_get_raw_connections() in hda_read_pin_conn() bypasses the cache and thus also bypasses the overridden pin connection list. On platforms that require the connection list fixup, mux list will be empty and HDMI playback will fail to -EBUSY at open. Fix the regression in hda_read_pinn_conn(). Simplify code as suggested by Takashi Iwai to remove old intel_haswell_fixup_connect_list() and copy the cvt_nid list directly and not use snd_hda_override_conn_list() at all. Fixes: 9c32fea83692 ("ALSA: hda - Add DP-MST support for non-acomp codecs") BugLink: https://github.com/thesofproject/linux/issues/1537 Cc: Nikhil Mahale <nmahale(a)nvidia.com> Signed-off-by: Kai Vehmanen <kai.vehmanen(a)linux.intel.com> --- sound/pci/hda/patch_hdmi.c | 38 ++++++++++++-------------------------- 1 file changed, 12 insertions(+), 26 deletions(-) diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 55d20e40a195..373ca99b7a2f 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1302,6 +1302,7 @@ static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx) struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); hda_nid_t pin_nid = per_pin->pin_nid; int dev_id = per_pin->dev_id; + int conns; if (!(get_wcaps(codec, pin_nid) & AC_WCAP_CONN_LIST)) { codec_warn(codec, @@ -1312,10 +1313,18 @@ static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx) snd_hda_set_dev_select(codec, pin_nid, dev_id); + if (spec->intel_hsw_fixup) { + conns = spec->num_cvts; + memcpy(per_pin->mux_nids, spec->cvt_nids, + sizeof(hda_nid_t) * conns); + } else { + conns = snd_hda_get_raw_connections(codec, pin_nid, + per_pin->mux_nids, + HDA_MAX_CONNECTIONS); + } + /* all the device entries on the same pin have the same conn list */ - per_pin->num_mux_nids = - snd_hda_get_raw_connections(codec, pin_nid, per_pin->mux_nids, - HDA_MAX_CONNECTIONS); + per_pin->num_mux_nids = conns; return 0; } @@ -1713,9 +1722,6 @@ static void hdmi_repoll_eld(struct work_struct *work) mutex_unlock(&spec->pcm_lock); } -static void intel_haswell_fixup_connect_list(struct hda_codec *codec, - hda_nid_t nid); - static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid) { struct hdmi_spec *spec = codec->spec; @@ -1790,8 +1796,6 @@ static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid) per_pin->dev_id = i; per_pin->non_pcm = false; snd_hda_set_dev_select(codec, pin_nid, i); - if (spec->intel_hsw_fixup) - intel_haswell_fixup_connect_list(codec, pin_nid); err = hdmi_read_pin_conn(codec, pin_idx); if (err < 0) return err; @@ -2603,24 +2607,6 @@ static void generic_acomp_init(struct hda_codec *codec, * Intel codec parsers and helpers */ -static void intel_haswell_fixup_connect_list(struct hda_codec *codec, - hda_nid_t nid) -{ - struct hdmi_spec *spec = codec->spec; - hda_nid_t conns[4]; - int nconns; - - nconns = snd_hda_get_raw_connections(codec, nid, conns, - ARRAY_SIZE(conns)); - if (nconns == spec->num_cvts && - !memcmp(conns, spec->cvt_nids, spec->num_cvts * sizeof(hda_nid_t))) - return; - - /* override pins connection list */ - codec_dbg(codec, "hdmi: haswell: override pin connection 0x%x\n", nid); - snd_hda_override_conn_list(codec, nid, spec->num_cvts, spec->cvt_nids); -} - #define INTEL_GET_VENDOR_VERB 0xf81 #define INTEL_SET_VENDOR_VERB 0x781 #define INTEL_EN_DP12 0x02 /* enable DP 1.2 features */ -- 2.17.1

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