On Mon, Sep 9, 2019 at 2:38 AM Russell King - ARM Linux admin <linux@xxxxxxxxxxxxxxx> wrote: > > On Thu, Sep 05, 2019 at 05:43:25PM +0800, Cheng-Yi Chiang wrote: > > From: Yakir Yang <ykk@xxxxxxxxxxxxxx> > > > > When transmitting IEC60985 linear PCM audio, we configure the > > Aduio Sample Channel Status information of all the channel > > status bits in the IEC60958 frame. > > Refer to 60958-3 page 10 for frequency, original frequency, and > > wordlength setting. > > > > This fix the issue that audio does not come out on some monitors > > (e.g. LG 22CV241) > > > > Note that these registers are only for interfaces: > > I2S audio interface, General Purpose Audio (GPA), or AHB audio DMA > > (AHBAUDDMA). > > For S/PDIF interface this information comes from the stream. > > > > Currently this function dw_hdmi_set_channel_status is only called > > from dw-hdmi-i2s-audio in I2S setup. > > > > Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx> > > Signed-off-by: Cheng-Yi Chiang <cychiang@xxxxxxxxxxxx> > > --- > > Original patch by Yakir Yang is at > > > > https://lore.kernel.org/patchwork/patch/539653/ > > > > Change from v1 to v2: > > 1. Remove the version check because this will only be called by > > dw-hdmi-i2s-audio, and the registers are available in I2S setup. > > 2. Set these registers in dw_hdmi_i2s_hw_params. > > 3. Fix the sample width setting so it can use 16 or 24 bits. > > > > .../drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 1 + > > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 70 +++++++++++++++++++ > > drivers/gpu/drm/bridge/synopsys/dw-hdmi.h | 20 ++++++ > > include/drm/bridge/dw_hdmi.h | 2 + > > 4 files changed, 93 insertions(+) > > > > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c > > index 34d8e837555f..b801a28b0f17 100644 > > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c > > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c > > @@ -102,6 +102,7 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data, > > } > > > > dw_hdmi_set_sample_rate(hdmi, hparms->sample_rate); > > + dw_hdmi_set_channel_status(hdmi, hparms->sample_width); > > dw_hdmi_set_channel_count(hdmi, hparms->channels); > > dw_hdmi_set_channel_allocation(hdmi, hparms->cea.channel_allocation); > > > > dw_hdmi_i2s_hw_params() is passed the channel status data in > hparams->iec.status Rather than re-creating it afresh in the driver, > I'd recommend programming the already supplied channel status data > into the registers. > Hi Russell, Thank you for pointing this out. I did not realize that the status data is already set. I will fix in v3 to make this patch much simpler. > > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c > > index bd65d0479683..d1daa369c8ae 100644 > > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c > > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c > > @@ -582,6 +582,76 @@ static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk) > > return n; > > } > > > > +/* > > + * When transmitting IEC60958 linear PCM audio, these registers allow to > > + * configure the channel status information of all the channel status > > + * bits in the IEC60958 frame. For the moment this configuration is only > > + * used when the I2S audio interface, General Purpose Audio (GPA), > > + * or AHB audio DMA (AHBAUDDMA) interface is active > > + * (for S/PDIF interface this information comes from the stream). > > + */ > > +void dw_hdmi_set_channel_status(struct dw_hdmi *hdmi, > > + unsigned int sample_width) > > +{ > > + u8 aud_schnl_samplerate; > > + u8 aud_schnl_8; > > + u8 word_length_bits; > > + > > + switch (hdmi->sample_rate) { > > + case 32000: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_32K; > > + break; > > + case 44100: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_44K1; > > + break; > > + case 48000: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_48K; > > + break; > > + case 88200: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_88K2; > > + break; > > + case 96000: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_96K; > > + break; > > + case 176400: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_176K4; > > + break; > > + case 192000: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_192K; > > + break; > > + case 768000: > > + aud_schnl_samplerate = HDMI_FC_AUDSCHNLS7_SMPRATE_768K; > > + break; > > + default: > > + dev_warn(hdmi->dev, "Unsupported audio sample rate (%u)\n", > > + hdmi->sample_rate); > > + return; > > + } > > + > > + /* set channel status register */ > > + hdmi_modb(hdmi, aud_schnl_samplerate, HDMI_FC_AUDSCHNLS7_SMPRATE_MASK, > > + HDMI_FC_AUDSCHNLS7); > > + > > + /* > > + * Set original frequency to be the same as frequency. > > + * Use one-complement value as stated in IEC60958-3 page 13. > > + */ > > + aud_schnl_8 = (~aud_schnl_samplerate) << > > + HDMI_FC_AUDSCHNLS8_ORIGSAMPFREQ_OFFSET; > > + > > + /* > > + * Refer to IEC60958-3 page 12. We can accept 16 bits or 24 bits. > > + * Otherwise, set the register to 0t o indicate using default value. > > + */ > > + word_length_bits = (sample_width == 16) ? 0x2 : > > + ((sample_width == 24) ? 0xb : 0); > > + > > + aud_schnl_8 |= word_length_bits << HDMI_FC_AUDSCHNLS8_WORDLEGNTH_OFFSET; > > + > > + hdmi_writeb(hdmi, aud_schnl_8, HDMI_FC_AUDSCHNLS8); > > +} > > +EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_status); > > As mentioned above, the channel status data is actually already > provided - so we don't really need the above at all. It just > needs the data programmed into the registers. > ACK > > + > > static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi, > > unsigned long pixel_clk, unsigned int sample_rate) > > { > > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h > > index 6988f12d89d9..619ebc1c8354 100644 > > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h > > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h > > @@ -158,6 +158,17 @@ > > #define HDMI_FC_SPDDEVICEINF 0x1062 > > #define HDMI_FC_AUDSCONF 0x1063 > > #define HDMI_FC_AUDSSTAT 0x1064 > > +#define HDMI_FC_AUDSV 0x1065 > > +#define HDMI_FC_AUDSU 0x1066 > > +#define HDMI_FC_AUDSCHNLS0 0x1067 > > +#define HDMI_FC_AUDSCHNLS1 0x1068 > > +#define HDMI_FC_AUDSCHNLS2 0x1069 > > +#define HDMI_FC_AUDSCHNLS3 0x106a > > +#define HDMI_FC_AUDSCHNLS4 0x106b > > +#define HDMI_FC_AUDSCHNLS5 0x106c > > +#define HDMI_FC_AUDSCHNLS6 0x106d > > +#define HDMI_FC_AUDSCHNLS7 0x106e > > +#define HDMI_FC_AUDSCHNLS8 0x106f > > #define HDMI_FC_DATACH0FILL 0x1070 > > #define HDMI_FC_DATACH1FILL 0x1071 > > #define HDMI_FC_DATACH2FILL 0x1072 > > @@ -706,6 +717,15 @@ enum { > > /* HDMI_FC_AUDSCHNLS7 field values */ > > HDMI_FC_AUDSCHNLS7_ACCURACY_OFFSET = 4, > > HDMI_FC_AUDSCHNLS7_ACCURACY_MASK = 0x30, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_MASK = 0x0f, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_192K = 0xe, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_176K4 = 0xc, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_96K = 0xa, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_768K = 0x9, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_88K2 = 0x8, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_32K = 0x3, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_48K = 0x2, > > + HDMI_FC_AUDSCHNLS7_SMPRATE_44K1 = 0x0, > > These look very much like the IEC958_AES* consumer definitions in > include/sound/asoundef.h. ACK. Will remove in v3. > > > /* HDMI_FC_AUDSCHNLS8 field values */ > > HDMI_FC_AUDSCHNLS8_ORIGSAMPFREQ_MASK = 0xf0, > > diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h > > index cf528c289857..12144d2f80f4 100644 > > --- a/include/drm/bridge/dw_hdmi.h > > +++ b/include/drm/bridge/dw_hdmi.h > > @@ -156,6 +156,8 @@ void dw_hdmi_setup_rx_sense(struct dw_hdmi *hdmi, bool hpd, bool rx_sense); > > > > void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate); > > void dw_hdmi_set_channel_count(struct dw_hdmi *hdmi, unsigned int cnt); > > +void dw_hdmi_set_channel_status(struct dw_hdmi *hdmi, > > + unsigned int sample_width); > > void dw_hdmi_set_channel_allocation(struct dw_hdmi *hdmi, unsigned int ca); > > void dw_hdmi_audio_enable(struct dw_hdmi *hdmi); > > void dw_hdmi_audio_disable(struct dw_hdmi *hdmi); > > -- > > 2.23.0.187.g17f5b7556c-goog > > > > > > _______________________________________________ > > linux-arm-kernel mailing list > > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > > > > -- > RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ > FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up > According to speedtest.net: 11.9Mbps down 500kbps up _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
