From patchwork Wed Dec 11 23:41:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13904471 Received: from mail-lf1-f49.google.com (mail-lf1-f49.google.com [209.85.167.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DBDA41FCFE2 for ; Wed, 11 Dec 2024 23:42:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.49 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733960534; cv=none; b=kgCl01cVfVoOQfztCKyfe9+fK0IL6xAOpJG2V7zbChLAXbEny1Th3wVB5iiEKK/Y3/WSXxk09VdUdWIMYL9tvwVGOYdFg5OVJbemdSPptU6gxceTzFCIBrs+BVyiAkTgFKNuBiYnB2sv1dGmKVggpJIyvsAefyEFAOUdm1ff+HM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733960534; c=relaxed/simple; bh=Vlr0qCr5Qq7Z1517nTZm3+a1T2qh+w8F5jSV1/zOj3o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=YUHvQFjKUr2YEV9anNmoU9Be+ntm/u3gdYH9DlcZNsze71kLPvOCsZlVt7C3gp0gWjls04oPbX6ivvjtSuhrIL3GLFW8QR2AEplIC9yLddRxNJo6T7hbwo7De4C3CoXOFkyvSqeV3tqdoJoRPNPilxIoS5/chfTp63rf8m/VkcE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=s8Zow32v; arc=none smtp.client-ip=209.85.167.49 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="s8Zow32v" Received: by mail-lf1-f49.google.com with SMTP id 2adb3069b0e04-5401bd6cdb4so3911e87.2 for ; Wed, 11 Dec 2024 15:42:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1733960530; x=1734565330; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=x313+1oN08qAZdGd7VU3lvJqWcuuSJ05LvyfKdPKUXc=; b=s8Zow32vvLfCStvq+Dna44aAHqcD69yWngPwHswrdUB9Ldu4uZQi9h+ss7RzcGpsGN 3Mb/pMZlcZ/xgDg9+481UKXm+k1YVY6QXuSd/b1lR06UuDnD3JsLWsMrxuHlvqZV8Rrx 1bGWAkMxoFCSNtFGtVU2OQxcABkwrREF0wPi5ux4iSNEhCO4EwD7AAYYB/2QgxoWhUx2 REEXB+RNRpcmCglQ53GAzqiZlY0Ymx2pVg5mh0Rk/rR9eJyD3TZcxWwOkmc85OWZfhz2 j23Oa77CBYnRWHsy/2qfKKZtGM+aDPDK4mm1W7dGeKsoH+XELdtb++DYTnddBu4rGo3g 3g3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733960530; x=1734565330; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=x313+1oN08qAZdGd7VU3lvJqWcuuSJ05LvyfKdPKUXc=; b=e+3dGBcXP510KCx/FnypaQJKEycRADDiiAR9IcBwQdYsje3OXO4m2mMKnsBvYyOxP5 fzv+cDQpMVt/bTy90PdrkHGgagOErPZmeLmTgJZR4SpjBW3MyLKeDLf3vR8VaM90xVM5 qxL7DbdQYatlp2PCZeMc6SirTrk8RXOnXnIIo3YY+nxGmcSWrAMvKDuTb+/J+rf3NqrT YkOqByEjBOsOHtAlOBSv5ybzqVUzomxLt22UMFQVfPndInDpPOUTEj/EVs1Pl3LomrmJ SyDZUqeGZVinOGvqj7S3M8qySl7fjPr9gDDMy6crUYpjlztodMYQt120LWw35/VT7BOI 16AQ== X-Forwarded-Encrypted: i=1; AJvYcCXeyrBcH0j/XjnKw3Tj97OPkDBH0PmehA5aP08CQkKV9Lb1atj+6PJVLDCrS+8PJo2IjSXLNjMwUx5bUDXA@vger.kernel.org X-Gm-Message-State: AOJu0YwV6SdGFWcra7/oEcj8UpFYSyoIuZfeLPd5vsVcZU7BRgSIsML1 MNzq9VU8c5PDO2stPZjItSNSbrFWulcDD+HljmN0C1cOCsIxqpRiN/UIfyfokDY= X-Gm-Gg: ASbGnctdCSoMdORPWq6nNVMU0SRTIBYCwxinlHtLI/WbYQWZiwfbImFj01p1qEZOva0 dA8Kn/5UrnpnfHB3qYyFJdSNf99vni280+nLU/Jix01t+5glqgpIJDNeBQFcI9Y1EWuq5dowB4Y qNLI+4Ss/IdqLTm+D7rbZklhMQOZe+zVOmKxcpNPDarhqhuhVGx9g966/lbjEltslgDO+I+/XEU zydxxwg2vyKqMbToRjcpCZLkqu/VbHhhwZ0qIskmzNbaLExoUkx0+9wLDaf0w== X-Google-Smtp-Source: AGHT+IH26OPMh39KbsRKFhuG8wSJzBlGEEWgCA7nuBmFlSHnd4AwCxaEymodGbIx7APuSpKz3DrCVw== X-Received: by 2002:a05:6512:138c:b0:53f:5e23:fb73 with SMTP id 2adb3069b0e04-5402a60a611mr1400018e87.57.1733960530010; Wed, 11 Dec 2024 15:42:10 -0800 (PST) Received: from umbar.lan ([192.130.178.90]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5401cc76909sm1222207e87.58.2024.12.11.15.42.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Dec 2024 15:42:08 -0800 (PST) From: Dmitry Baryshkov Date: Thu, 12 Dec 2024 01:41:44 +0200 Subject: [PATCH v3 09/14] drm/msm/dp: use msm_dp_utils_pack_sdp_header() for audio packets Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241212-fd-dp-audio-fixup-v3-9-0b1c65e7dba3@linaro.org> References: <20241212-fd-dp-audio-fixup-v3-0-0b1c65e7dba3@linaro.org> In-Reply-To: <20241212-fd-dp-audio-fixup-v3-0-0b1c65e7dba3@linaro.org> To: Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Paloma Arellano Cc: Douglas Anderson , Stephen Boyd , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=11630; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=Vlr0qCr5Qq7Z1517nTZm3+a1T2qh+w8F5jSV1/zOj3o=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBnWiM4aF+VaG/zc4iZHV3bokJhy6sF2P596G9nL yNQ6oFpFM2JATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ1ojOAAKCRCLPIo+Aiko 1d8yB/9Z7hhwYAMeHanlRg9fnfn5ei7cQfnFBn/JM0Hvxfxx7ZRNLXHO1jg0Fm7RFULhLS2kYoN shTpcjOqzQGLASJ5gSsHqO/Khi49upkI9/NVnuOfp8/UorJ9tLjfzrqBHrEnlLcjcZwRKNROhmq vC6Bf/A7saULjdxBWdgKLYFKocrFN5q0iDmhg8zBWdZmb4436HiyJDH1OqIppun/615HeKrHeG5 ZizHWl09IJhmFjNIf/8qZP8arns9PKFvvoqRAmQZ2nzfJJmuOCI5yDNzqrr0DeGEisoJGOUuzLt TazR+o09FIuw0x6U+GqLVI7g+XjcOs2LBAyBs5koKJ11VaXs X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A Use msm_dp_utils_pack_sdp_header() and call msm_dp_write_link() directly to program audio packet data. Use 0 as Packet ID, as it was not programmed earlier. Reviewed-by: Stephen Boyd Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/dp/dp_audio.c | 288 +++++++++----------------------------- 1 file changed, 66 insertions(+), 222 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c index 5cbb11986460d1e4ed1890bdf66d0913e013083c..1aa52d5cc08684a49102e45ed6e40ac2b13497c7 100644 --- a/drivers/gpu/drm/msm/dp/dp_audio.c +++ b/drivers/gpu/drm/msm/dp/dp_audio.c @@ -14,6 +14,7 @@ #include "dp_catalog.h" #include "dp_audio.h" #include "dp_panel.h" +#include "dp_reg.h" #include "dp_display.h" #include "dp_utils.h" @@ -28,251 +29,94 @@ struct msm_dp_audio_private { struct msm_dp_audio msm_dp_audio; }; -static u32 msm_dp_audio_get_header(struct msm_dp_catalog *catalog, - enum msm_dp_catalog_audio_sdp_type sdp, - enum msm_dp_catalog_audio_header_type header) -{ - return msm_dp_catalog_audio_get_header(catalog, sdp, header); -} - -static void msm_dp_audio_set_header(struct msm_dp_catalog *catalog, - u32 data, - enum msm_dp_catalog_audio_sdp_type sdp, - enum msm_dp_catalog_audio_header_type header) -{ - msm_dp_catalog_audio_set_header(catalog, sdp, header, data); -} - static void msm_dp_audio_stream_sdp(struct msm_dp_audio_private *audio) { struct msm_dp_catalog *catalog = audio->catalog; - u32 value, new_value; - u8 parity_byte; - - /* Config header and parity byte 1 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1); - - new_value = 0x02; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_1_BIT) - | (parity_byte << PARITY_BYTE_1_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 1: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1); - - /* Config header and parity byte 2 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2); - new_value = value; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_2_BIT) - | (parity_byte << PARITY_BYTE_2_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 2: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2); - - /* Config header and parity byte 3 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3); - - new_value = audio->channels - 1; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_3_BIT) - | (parity_byte << PARITY_BYTE_3_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 3: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3); + struct dp_sdp_header sdp_hdr = { + .HB0 = 0x00, + .HB1 = 0x02, + .HB2 = 0x00, + .HB3 = audio->channels - 1, + }; + u32 header[2]; + + msm_dp_utils_pack_sdp_header(&sdp_hdr, header); + + msm_dp_write_link(catalog, MMSS_DP_AUDIO_STREAM_0, header[0]); + msm_dp_write_link(catalog, MMSS_DP_AUDIO_STREAM_1, header[1]); } static void msm_dp_audio_timestamp_sdp(struct msm_dp_audio_private *audio) { struct msm_dp_catalog *catalog = audio->catalog; - u32 value, new_value; - u8 parity_byte; - - /* Config header and parity byte 1 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1); - - new_value = 0x1; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_1_BIT) - | (parity_byte << PARITY_BYTE_1_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 1: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1); - - /* Config header and parity byte 2 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2); - - new_value = 0x17; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_2_BIT) - | (parity_byte << PARITY_BYTE_2_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 2: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2); - - /* Config header and parity byte 3 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3); - - new_value = (0x0 | (0x11 << 2)); - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_3_BIT) - | (parity_byte << PARITY_BYTE_3_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 3: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3); + struct dp_sdp_header sdp_hdr = { + .HB0 = 0x00, + .HB1 = 0x01, + .HB2 = 0x17, + .HB3 = 0x0 | (0x11 << 2), + }; + u32 header[2]; + + msm_dp_utils_pack_sdp_header(&sdp_hdr, header); + + msm_dp_write_link(catalog, MMSS_DP_AUDIO_TIMESTAMP_0, header[0]); + msm_dp_write_link(catalog, MMSS_DP_AUDIO_TIMESTAMP_1, header[1]); } static void msm_dp_audio_infoframe_sdp(struct msm_dp_audio_private *audio) { struct msm_dp_catalog *catalog = audio->catalog; - u32 value, new_value; - u8 parity_byte; - - /* Config header and parity byte 1 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1); - - new_value = 0x84; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_1_BIT) - | (parity_byte << PARITY_BYTE_1_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 1: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1); - - /* Config header and parity byte 2 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2); - - new_value = 0x1b; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_2_BIT) - | (parity_byte << PARITY_BYTE_2_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 2: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2); - - /* Config header and parity byte 3 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3); - - new_value = (0x0 | (0x11 << 2)); - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_3_BIT) - | (parity_byte << PARITY_BYTE_3_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 3: value = 0x%x, parity_byte = 0x%x\n", - new_value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3); + struct dp_sdp_header sdp_hdr = { + .HB0 = 0x00, + .HB1 = 0x84, + .HB2 = 0x1b, + .HB3 = 0x0 | (0x11 << 2), + }; + u32 header[2]; + + msm_dp_utils_pack_sdp_header(&sdp_hdr, header); + + msm_dp_write_link(catalog, MMSS_DP_AUDIO_INFOFRAME_0, header[0]); + msm_dp_write_link(catalog, MMSS_DP_AUDIO_INFOFRAME_1, header[1]); } static void msm_dp_audio_copy_management_sdp(struct msm_dp_audio_private *audio) { struct msm_dp_catalog *catalog = audio->catalog; - u32 value, new_value; - u8 parity_byte; - - /* Config header and parity byte 1 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1); - - new_value = 0x05; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_1_BIT) - | (parity_byte << PARITY_BYTE_1_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 1: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1); - - /* Config header and parity byte 2 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2); - - new_value = 0x0F; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_2_BIT) - | (parity_byte << PARITY_BYTE_2_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 2: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2); - - /* Config header and parity byte 3 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3); - - new_value = 0x0; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_3_BIT) - | (parity_byte << PARITY_BYTE_3_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 3: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3); + struct dp_sdp_header sdp_hdr = { + .HB0 = 0x00, + .HB1 = 0x05, + .HB2 = 0x0f, + .HB3 = 0x00, + }; + u32 header[2]; + + msm_dp_utils_pack_sdp_header(&sdp_hdr, header); + + msm_dp_write_link(catalog, MMSS_DP_AUDIO_COPYMANAGEMENT_0, header[0]); + msm_dp_write_link(catalog, MMSS_DP_AUDIO_COPYMANAGEMENT_1, header[1]); } static void msm_dp_audio_isrc_sdp(struct msm_dp_audio_private *audio) { struct msm_dp_catalog *catalog = audio->catalog; - u32 value, new_value; - u8 parity_byte; - - /* Config header and parity byte 1 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1); - - new_value = 0x06; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_1_BIT) - | (parity_byte << PARITY_BYTE_1_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 1: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1); - - /* Config header and parity byte 2 */ - value = msm_dp_audio_get_header(catalog, - DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2); - - new_value = 0x0F; - parity_byte = msm_dp_utils_calculate_parity(new_value); - value |= ((new_value << HEADER_BYTE_2_BIT) - | (parity_byte << PARITY_BYTE_2_BIT)); - drm_dbg_dp(audio->drm_dev, - "Header Byte 2: value = 0x%x, parity_byte = 0x%x\n", - value, parity_byte); - msm_dp_audio_set_header(catalog, value, - DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2); + struct dp_sdp_header sdp_hdr = { + .HB0 = 0x00, + .HB1 = 0x06, + .HB2 = 0x0f, + .HB3 = 0x00, + }; + u32 header[2]; + u32 reg; + + /* XXX: is it necessary to preserve this field? */ + reg = msm_dp_read_link(catalog, MMSS_DP_AUDIO_ISRC_1); + sdp_hdr.HB3 = FIELD_GET(HEADER_3_MASK, reg); + + msm_dp_utils_pack_sdp_header(&sdp_hdr, header); + + msm_dp_write_link(catalog, MMSS_DP_AUDIO_ISRC_0, header[0]); + msm_dp_write_link(catalog, MMSS_DP_AUDIO_ISRC_1, header[1]); } static void msm_dp_audio_setup_sdp(struct msm_dp_audio_private *audio)