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[176.150.251.154]) by smtp.gmail.com with ESMTPSA id q15sm27450181wrg.65.2019.09.11.09.23.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Sep 2019 09:24:00 -0700 (PDT) Subject: Re: [PATCH v3] drm: bridge/dw_hdmi: add audio sample channel status setting To: Cheng-Yi Chiang , linux-kernel@vger.kernel.org References: <20190911082646.134347-1-cychiang@chromium.org> From: Neil Armstrong Openpgp: preference=signencrypt Autocrypt: addr=narmstrong@baylibre.com; prefer-encrypt=mutual; keydata= mQENBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAG0KE5laWwgQXJtc3Ryb25nIDxuYXJtc3Ryb25nQGJheWxpYnJlLmNvbT6JATsEEwEKACUC GyMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheABQJXDO2CAhkBAAoJEBaat7Gkz/iubGIH/iyk RqvgB62oKOFlgOTYCMkYpm2aAOZZLf6VKHKc7DoVwuUkjHfIRXdslbrxi4pk5VKU6ZP9AKsN NtMZntB8WrBTtkAZfZbTF7850uwd3eU5cN/7N1Q6g0JQihE7w4GlIkEpQ8vwSg5W7hkx3yQ6 2YzrUZh/b7QThXbNZ7xOeSEms014QXazx8+txR7jrGF3dYxBsCkotO/8DNtZ1R+aUvRfpKg5 ZgABTC0LmAQnuUUf2PHcKFAHZo5KrdO+tyfL+LgTUXIXkK+tenkLsAJ0cagz1EZ5gntuheLD YJuzS4zN+1Asmb9kVKxhjSQOcIh6g2tw7vaYJgL/OzJtZi6JlIW5AQ0ETVkGzwEIALyKDN/O GURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYpQTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXM coJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hi SvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY4yG6xI99NIPEVE9lNBXBKIlewIyVlkOa YvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoMMtsyw18YoX9BqMFInxqYQQ3j/HpVgTSv mo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUXoUk33HEAEQEAAYkBHwQYAQIACQUCTVkG zwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfnM7IbRuiSZS1unlySUVYu3SD6YBYnNi3G 5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa33eDIHu/zr1HMKErm+2SD6PO9umRef8V8 2o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCSKmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+ RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJ C3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTTQbM0WUIBIcGmq38+OgUsMYu4NzLu7uZF Acmp6h8guQINBFYnf6QBEADQ+wBYa+X2n/xIQz/RUoGHf84Jm+yTqRT43t7sO48/cBW9vAn9 GNwnJ3HRJWKATW0ZXrCr40ES/JqM1fUTfiFDB3VMdWpEfwOAT1zXS+0rX8yljgsWR1UvqyEP 3xN0M/40Zk+rdmZKaZS8VQaXbveaiWMEmY7sBV3QvgOzB7UF2It1HwoCon5Y+PvyE3CguhBd 9iq5iEampkMIkbA3FFCpQFI5Ai3BywkLzbA3ZtnMXR8Qt9gFZtyXvFQrB+/6hDzEPnBGZOOx zkd/iIX59SxBuS38LMlhPPycbFNmtauOC0DNpXCv9ACgC9tFw3exER/xQgSpDVc4vrL2Cacr wmQp1k9E0W+9pk/l8S1jcHx03hgCxPtQLOIyEu9iIJb27TjcXNjiInd7Uea195NldIrndD+x 58/yU3X70qVY+eWbqzpdlwF1KRm6uV0ZOQhEhbi0FfKKgsYFgBIBchGqSOBsCbL35f9hK/JC 6LnGDtSHeJs+jd9/qJj4WqF3x8i0sncQ/gszSajdhnWrxraG3b7/9ldMLpKo/OoihfLaCxtv xYmtw8TGhlMaiOxjDrohmY1z7f3rf6njskoIXUO0nabun1nPAiV1dpjleg60s3OmVQeEpr3a K7gR1ljkemJzM9NUoRROPaT7nMlNYQL+IwuthJd6XQqwzp1jRTGG26J97wARAQABiQM+BBgB AgAJBQJWJ3+kAhsCAikJEBaat7Gkz/iuwV0gBBkBAgAGBQJWJ3+kAAoJEHfc29rIyEnRk6MQ AJDo0nxsadLpYB26FALZsWlN74rnFXth5dQVQ7SkipmyFWZhFL8fQ9OiIoxWhM6rSg9+C1w+ n45eByMg2b8H3mmQmyWztdI95OxSREKwbaXVapCcZnv52JRjlc3DoiiHqTZML5x1Z7lQ1T3F 8o9sKrbFO1WQw1+Nc91+MU0MGN0jtfZ0Tvn/ouEZrSXCE4K3oDGtj3AdC764yZVq6CPigCgs 6Ex80k6QlzCdVP3RKsnPO2xQXXPgyJPJlpD8bHHHW7OLfoR9DaBNympfcbQJeekQrTvyoASw EOTPKE6CVWrcQIztUp0WFTdRGgMK0cZB3Xfe6sOp24PQTHAKGtjTHNP/THomkH24Fum9K3iM /4Wh4V2eqGEgpdeSp5K+LdaNyNgaqzMOtt4HYk86LYLSHfFXywdlbGrY9+TqiJ+ZVW4trmui NIJCOku8SYansq34QzYM0x3UFRwff+45zNBEVzctSnremg1mVgrzOfXU8rt+4N1b2MxorPF8 619aCwVP7U16qNSBaqiAJr4e5SNEnoAq18+1Gp8QsFG0ARY8xp+qaKBByWES7lRi3QbqAKZf yOHS6gmYo9gBmuAhc65/VtHMJtxwjpUeN4Bcs9HUpDMDVHdfeRa73wM+wY5potfQ5zkSp0Jp bxnv/cRBH6+c43stTffprd//4Hgz+nJcCgZKtCYIAPkUxABC85ID2CidzbraErVACmRoizhT KR2OiqSLW2x4xdmSiFNcIWkWJB6Qdri0Fzs2dHe8etD1HYaht1ZhZ810s7QOL7JwypO8dscN KTEkyoTGn6cWj0CX+PeP4xp8AR8ot4d0BhtUY34UPzjE1/xyrQFAdnLd0PP4wXxdIUuRs0+n WLY9Aou/vC1LAdlaGsoTVzJ2gX4fkKQIWhX0WVk41BSFeDKQ3RQ2pnuzwedLO94Bf6X0G48O VsbXrP9BZ6snXyHfebPnno/te5XRqZTL9aJOytB/1iUna+1MAwBxGFPvqeEUUyT+gx1l3Acl ZaTUOEkgIor5losDrePdPgE= Organization: Baylibre Message-ID: <1e2ec69d-e42d-4e1b-7ce9-d1620cfbb4c9@baylibre.com> Date: Wed, 11 Sep 2019 18:23:59 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190911082646.134347-1-cychiang@chromium.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190911_092403_189584_879D9148 X-CRM114-Status: GOOD ( 23.92 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alsa-devel@alsa-project.org, kuninori.morimoto.gx@renesas.com, airlied@linux.ie, dri-devel@lists.freedesktop.org, cain.cai@rock-chips.com, a.hajda@samsung.com, Laurent.pinchart@ideasonboard.com, Yakir Yang , sam@ravnborg.org, Jerome Brunet , zhengxing@rock-chips.com, linux-rockchip@lists.infradead.org, dgreid@chromium.org, tzungbi@chromium.org, Jonas Karlman , jeffy.chen@rock-chips.com, eddie.cai@rock-chips.com, linux-arm-kernel@lists.infradead.org, Jernej Skrabec , dianders@chromium.org, daniel@ffwll.ch, enric.balletbo@collabora.com, kuankuan.y@gmail.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 11/09/2019 10:26, Cheng-Yi Chiang wrote: > From: Yakir Yang > > When transmitting IEC60985 linear PCM audio, we configure the > Aduio Sample Channel Status information in the IEC60958 frame. > The status bit is already available in iec.status of hdmi_codec_params. > > 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 > Signed-off-by: Cheng-Yi Chiang > --- > > Change from v2 to v3: > 1. Reuse what is already set in iec.status in hw_param. > 2. Remove all useless definition of registers and values. > 3. Note that the original sampling frequency is not written to > the channel status as we reuse create_iec958_consumer in pcm_iec958.c. > Without that it can still play audio fine. > > .../drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 1 + > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 20 +++++++++++++++++++ > drivers/gpu/drm/bridge/synopsys/dw-hdmi.h | 2 ++ > include/drm/bridge/dw_hdmi.h | 1 + > 4 files changed, 24 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..20f4f92dd866 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->iec.status); > dw_hdmi_set_channel_count(hdmi, hparms->channels); > dw_hdmi_set_channel_allocation(hdmi, hparms->cea.channel_allocation); > > diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c > index bd65d0479683..aa7efd4da1c8 100644 > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c > @@ -582,6 +582,26 @@ 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, > + u8 *channel_status) > +{ > + /* > + * Set channel status register for frequency and word length. > + * Use default values for other registers. > + */ > + hdmi_writeb(hdmi, channel_status[3], HDMI_FC_AUDSCHNLS7); > + hdmi_writeb(hdmi, channel_status[4], HDMI_FC_AUDSCHNLS8); > +} > +EXPORT_SYMBOL_GPL(dw_hdmi_set_channel_status); > + > 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..fcff5059db24 100644 > --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h > +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.h > @@ -158,6 +158,8 @@ > #define HDMI_FC_SPDDEVICEINF 0x1062 > #define HDMI_FC_AUDSCONF 0x1063 > #define HDMI_FC_AUDSSTAT 0x1064 > +#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 > diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h > index cf528c289857..4b3e863c4f8a 100644 > --- a/include/drm/bridge/dw_hdmi.h > +++ b/include/drm/bridge/dw_hdmi.h > @@ -156,6 +156,7 @@ 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, u8 *channel_status); > 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); > Looks fine for me: Reviewed-by: Neil Armstrong Jonas ? Jernej ? Russell ? If it's ok for you I'll apply it. Neil _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel