From nobody Sun Feb 8 18:03:24 2026 Received: from ironport.ite.com.tw (60-251-196-230.hinet-ip.hinet.net [60.251.196.230]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9C9BC41C85 for ; Mon, 23 Sep 2024 09:49:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.251.196.230 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727084955; cv=none; b=anIDzTut+Pd/Yqa/3F1uM3C2FvB3biaozaMIpWzEMp1T2ydGEc0bSSbz8RYVD/RJgu+S7/CiQ9aRshEbL28kjZ7tQNDXL8b4bJ1B/KiAi/s7uk2llmSs1Fp5oEBIIU2adlM6Bag4ZCtX6h62iBOdb74R2n7l71DIa7COzAdbcpM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727084955; c=relaxed/simple; bh=bcab8NKHKZ/OgrxhIJmEfaGKndgOMoqcYPFJWmPeyAo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=JEpJNTriXFth4RXsakso/zho0qD/rBlUq0NCaoeuKm/ybKMOkheP8DLouIuojDPyv9EzBcTmgPGwvijQb5kfv+LcYDb/lGQUIviqpeTYlpii7GquVkeIO/xTaOfFkoHjtH+SlG2qyAiubwtxfoKzoKwr1ypKCDZFOiTjqFpPdQk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ite.com.tw; spf=pass smtp.mailfrom=ite.com.tw; dkim=fail (0-bit key) header.d=ite.com.tw header.i=@ite.com.tw header.b=FYo4PnPE reason="key not found in DNS"; arc=none smtp.client-ip=60.251.196.230 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ite.com.tw Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ite.com.tw Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=ite.com.tw header.i=@ite.com.tw header.b="FYo4PnPE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ite.com.tw; s=dkim; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=D4CBwdKSZlEyvTAklHN3JJbjBXdUi11CtZopOAHER8E=; b=FYo4PnPEhGc6kczKHRSMIMGv6JwSfMJH86mu0roOYcIguXF7JDZBD8La kzDS4XOgEnIkT84YLYjQvf7JeeMecwUDOAL5kny56cgK0Ohf86E808M5V 3knGrm8wMYz664Y/ltJnrTrtxRBa2oXTmJLF3BwoP/I7fUdfSdtIvRv9H dKrC1dobS9dAuc656NOyIGS2fKHiG+3vWMJsHuGOlLMe/5yM3OeifGYE0 rmnW0dCzdCrKCUoWFlFsRCKUrbBg9QdpB1u3Gjf9dQa6ExZ8Qa8HBCyTH ENXwinyNhZEDFyN9AWkUyW8n3PQB9PZK8S8P6Pq6+ED6qSgeBm7FEK9CE A==; X-CSE-ConnectionGUID: 70onGuvJT6GSheoi+7fSEw== X-CSE-MsgGUID: 6e36F1gWSfeFzG8yo1T6iw== Received: from unknown (HELO mse.ite.com.tw) ([192.168.35.30]) by ironport.ite.com.tw with ESMTP; 23 Sep 2024 17:49:10 +0800 Received: from tpemail1.internal.ite.com.tw (TPEMAIL1.internal.ite.com.tw [192.168.15.58]) by mse.ite.com.tw with ESMTP id 48N9n8A7009871; Mon, 23 Sep 2024 17:49:08 +0800 (GMT-8) (envelope-from Hermes.Wu@ite.com.tw) Received: from LAPTOP-C4GM1L3U.localdomain (192.168.82.6) by TPEMAIL1.internal.ite.com.tw (192.168.15.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 23 Sep 2024 17:49:08 +0800 From: Hermes Wu To: Pin-yen Lin CC: Kenneth Hung , Hermes Wu , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , "open list:DRM DRIVERS" , open list Subject: [PATCH v3 1/3] drm/bridge: it6505: fix AUX read use aux fifo Date: Mon, 23 Sep 2024 17:48:26 +0800 Message-ID: <20240923094826.13471-2-Hermes.Wu@ite.com.tw> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240923094826.13471-1-Hermes.Wu@ite.com.tw> References: <20240923094826.13471-1-Hermes.Wu@ite.com.tw> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: TPEMAIL1.internal.ite.com.tw (192.168.15.58) To TPEMAIL1.internal.ite.com.tw (192.168.15.58) X-TM-SNTS-SMTP: 53760FD41471EB3EF1CF901DB81369D3A0B71CC022F59A8E0F0251D2E05DD05C2002:8 X-MAIL: mse.ite.com.tw 48N9n8A7009871 Content-Type: text/plain; charset="utf-8" From: Hermes Wu Changes in v3: -New in v3 it6505 AUX FIFO mode only 16 byte. AUX FIFO mode only supports EDID read and DPCD KSV FIFO area. Signed-off-by: Hermes Wu --- drivers/gpu/drm/bridge/ite-it6505.c | 25 +++++++++++++++++-------- 1 file changed, 17 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/i= te-it6505.c index 87b8545fccc0..d8b40ad890bf 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -300,7 +300,7 @@ #define MAX_CR_LEVEL 0x03 #define MAX_EQ_LEVEL 0x03 #define AUX_WAIT_TIMEOUT_MS 15 -#define AUX_FIFO_MAX_SIZE 32 +#define AUX_FIFO_MAX_SIZE 16 #define PIXEL_CLK_DELAY 1 #define PIXEL_CLK_INVERSE 0 #define ADJUST_PHASE_THRESHOLD 80000 @@ -324,8 +324,13 @@ enum aux_cmd_type { CMD_AUX_NATIVE_READ =3D 0x0, CMD_AUX_NATIVE_WRITE =3D 0x5, CMD_AUX_I2C_EDID_READ =3D 0xB, + + /* KSV list read using AUX native read with FIFO */ + CMD_AUX_GET_KSV_LIST =3D 0x10, }; =20 +#define GET_AUX_CONTROL_CODE(cmd) ((cmd) & 0x0F) + enum aux_cmd_reply { REPLY_ACK, REPLY_NACK, @@ -965,7 +970,8 @@ static ssize_t it6505_aux_operation(struct it6505 *it65= 05, it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, AUX_USER_MODE); =20 aux_op_start: - if (cmd =3D=3D CMD_AUX_I2C_EDID_READ) { + /* HW AUX FIFO supports only EDID and DCPD KSV FIFO aread */ + if (cmd =3D=3D CMD_AUX_I2C_EDID_READ || cmd =3D=3D CMD_AUX_GET_KSV_LIST) { /* AUX EDID FIFO has max length of AUX_FIFO_MAX_SIZE bytes. */ size =3D min_t(size_t, size, AUX_FIFO_MAX_SIZE); /* Enable AUX FIFO read back and clear FIFO */ @@ -996,7 +1002,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it6= 505, size); =20 /* Aux Fire */ - it6505_write(it6505, REG_AUX_CMD_REQ, cmd); + it6505_write(it6505, REG_AUX_CMD_REQ, GET_AUX_CONTROL_CODE(cmd)); =20 ret =3D it6505_aux_wait(it6505); if (ret < 0) @@ -1030,7 +1036,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it= 6505, goto aux_op_start; } =20 - if (cmd =3D=3D CMD_AUX_I2C_EDID_READ) { + if (cmd =3D=3D CMD_AUX_I2C_EDID_READ || cmd =3D=3D CMD_AUX_GET_KSV_LIST) { for (i =3D 0; i < size; i++) { ret =3D it6505_read(it6505, REG_AUX_DATA_FIFO); if (ret < 0) @@ -1055,7 +1061,7 @@ static ssize_t it6505_aux_operation(struct it6505 *it= 6505, ret =3D i; =20 aux_op_err: - if (cmd =3D=3D CMD_AUX_I2C_EDID_READ) { + if (cmd =3D=3D CMD_AUX_I2C_EDID_READ || cmd =3D=3D CMD_AUX_GET_KSV_LIST) { /* clear AUX FIFO */ it6505_set_bits(it6505, REG_AUX_CTRL, AUX_EN_FIFO_READ | CLR_EDID_FIFO, @@ -1078,8 +1084,11 @@ static ssize_t it6505_aux_do_transfer(struct it6505 = *it6505, int i, ret_size, ret =3D 0, request_size; =20 mutex_lock(&it6505->aux_lock); - for (i =3D 0; i < size; i +=3D 4) { - request_size =3D min((int)size - i, 4); + for (i =3D 0; i < size; ) { + if (cmd =3D=3D CMD_AUX_I2C_EDID_READ || cmd =3D=3D CMD_AUX_GET_KSV_LIST) + request_size =3D min_t(int, (int)size - i, AUX_FIFO_MAX_SIZE); + else + request_size =3D min_t(int, (int)size - i, 4); ret_size =3D it6505_aux_operation(it6505, cmd, address + i, buffer + i, request_size, reply); @@ -1088,6 +1097,7 @@ static ssize_t it6505_aux_do_transfer(struct it6505 *= it6505, goto aux_op_err; } =20 + i +=3D request_size; ret +=3D ret_size; } =20 @@ -2257,7 +2267,6 @@ static void it6505_link_training_work(struct work_str= uct *work) it6505->auto_train_retry--; 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Mon, 23 Sep 2024 17:49:20 +0800 From: Hermes Wu To: Pin-yen Lin CC: Kenneth Hung , Hermes Wu , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , "open list:DRM DRIVERS" , open list Subject: [PATCH v3 2/3] drm/bridge: it6505: HDCP CTS fail on repeater items Date: Mon, 23 Sep 2024 17:48:28 +0800 Message-ID: <20240923094826.13471-3-Hermes.Wu@ite.com.tw> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240923094826.13471-1-Hermes.Wu@ite.com.tw> References: <20240923094826.13471-1-Hermes.Wu@ite.com.tw> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: TPEMAIL1.internal.ite.com.tw (192.168.15.58) To TPEMAIL1.internal.ite.com.tw (192.168.15.58) X-TM-SNTS-SMTP: 98851776D81618FFAC035B6B70C395311032E33BF9685BB2FA81F938C3975CA72002:8 X-MAIL: mse.ite.com.tw 48N9nJ0T009955 Content-Type: text/plain; charset="utf-8" From: Hermes Wu Changes in v3: -add detials about fail item and changes. Fix HDCP CTS fail items on UNIGRAF DRP-100 DUT must Support 127 devices. DUT must check BSTATUS when recive CP_IRQ. DUT must enable encription when R0' is ready. DUT must retry V' check 3 times. it6505 must read DRP-100 KSV FIFO by FIFO mode. it6505 should restart HDCP within 5s if KSV not ready. Signed-off-by: Hermes Wu --- drivers/gpu/drm/bridge/ite-it6505.c | 112 ++++++++++++++++++---------- 1 file changed, 74 insertions(+), 38 deletions(-) diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/i= te-it6505.c index d8b40ad890bf..156440c6517e 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -296,7 +296,7 @@ #define MAX_LANE_COUNT 4 #define MAX_LINK_RATE HBR #define AUTO_TRAIN_RETRY 3 -#define MAX_HDCP_DOWN_STREAM_COUNT 10 +#define MAX_HDCP_DOWN_STREAM_COUNT 127 #define MAX_CR_LEVEL 0x03 #define MAX_EQ_LEVEL 0x03 #define AUX_WAIT_TIMEOUT_MS 15 @@ -1188,6 +1188,35 @@ static int it6505_get_edid_block(void *data, u8 *buf= , unsigned int block, return 0; } =20 +static int it6505_get_ksvlist(struct it6505 *it6505, u8 *buf, size_t len) +{ + int i, request_size, ret; + struct device *dev =3D it6505->dev; + enum aux_cmd_reply reply; + + for (i =3D 0; i < len; ) { + request_size =3D min_t(int, (int)len - i, 15); + + ret =3D it6505_aux_do_transfer(it6505, CMD_AUX_GET_KSV_LIST, + DP_AUX_HDCP_KSV_FIFO, + buf + i, request_size, &reply); + + DRM_DEV_DEBUG_DRIVER(dev, "request_size =3D %d, ret =3D%d", request_size= , ret); + if (ret < 0) + return ret; + + i +=3D request_size; + } + + DRM_DEV_DEBUG_DRIVER(dev, "ksv read cnt =3D %d down_stream_cnt=3D%d ", i,= i / 5); + + for (i =3D 0 ; i < len; i +=3D 5) + DRM_DEV_DEBUG_DRIVER(dev, "ksv[%d] =3D %02X%02X%02X%02X%02X", + i / 5, buf[i], buf[i + 1], buf[i + 2], buf[i + 3], buf[i + 4]); + + return len; +} + static void it6505_variable_config(struct it6505 *it6505) { it6505->link_rate_bw_code =3D HBR; @@ -1969,7 +1998,7 @@ static int it6505_setup_sha1_input(struct it6505 *it6= 505, u8 *sha1_input) { struct device *dev =3D it6505->dev; u8 binfo[2]; - int down_stream_count, i, err, msg_count =3D 0; + int down_stream_count, err, msg_count =3D 0; =20 err =3D it6505_get_dpcd(it6505, DP_AUX_HDCP_BINFO, binfo, ARRAY_SIZE(binfo)); @@ -1994,18 +2023,11 @@ static int it6505_setup_sha1_input(struct it6505 *i= t6505, u8 *sha1_input) down_stream_count); return 0; } - - for (i =3D 0; i < down_stream_count; i++) { - err =3D it6505_get_dpcd(it6505, DP_AUX_HDCP_KSV_FIFO + - (i % 3) * DRM_HDCP_KSV_LEN, - sha1_input + msg_count, - DRM_HDCP_KSV_LEN); - + err =3D it6505_get_ksvlist(it6505, sha1_input, down_stream_count * 5); if (err < 0) return err; =20 - msg_count +=3D 5; - } + msg_count +=3D down_stream_count * 5; =20 it6505->hdcp_down_stream_count =3D down_stream_count; sha1_input[msg_count++] =3D binfo[0]; @@ -2033,7 +2055,7 @@ static bool it6505_hdcp_part2_ksvlist_check(struct it= 6505 *it6505) { struct device *dev =3D it6505->dev; u8 av[5][4], bv[5][4]; - int i, err; + int i, err, retry; =20 i =3D it6505_setup_sha1_input(it6505, it6505->sha1_input); if (i <=3D 0) { @@ -2042,22 +2064,28 @@ static bool it6505_hdcp_part2_ksvlist_check(struct = it6505 *it6505) } =20 it6505_sha1_digest(it6505, it6505->sha1_input, i, (u8 *)av); + /*1B-05 V' must retry 3 times */ + for (retry =3D 0; retry < 3; retry++) { + err =3D it6505_get_dpcd(it6505, DP_AUX_HDCP_V_PRIME(0), (u8 *)bv, + sizeof(bv)); + + if (err < 0) { + dev_err(dev, "Read V' value Fail %d", retry); + continue; + } =20 - err =3D it6505_get_dpcd(it6505, DP_AUX_HDCP_V_PRIME(0), (u8 *)bv, - sizeof(bv)); + for (i =3D 0; i < 5; i++) { + if (bv[i][3] !=3D av[i][0] || bv[i][2] !=3D av[i][1] || + av[i][1] !=3D av[i][2] || bv[i][0] !=3D av[i][3]) + break; =20 - if (err < 0) { - dev_err(dev, "Read V' value Fail"); - return false; + DRM_DEV_DEBUG_DRIVER(dev, "V' all match!! %d, %d", retry, i); + return true; + } } =20 - for (i =3D 0; i < 5; i++) - if (bv[i][3] !=3D av[i][0] || bv[i][2] !=3D av[i][1] || - bv[i][1] !=3D av[i][2] || bv[i][0] !=3D av[i][3]) - return false; - - DRM_DEV_DEBUG_DRIVER(dev, "V' all match!!"); - return true; + DRM_DEV_DEBUG_DRIVER(dev, "V' NOT match!! %d", retry); + return false; } =20 static void it6505_hdcp_wait_ksv_list(struct work_struct *work) @@ -2065,7 +2093,8 @@ static void it6505_hdcp_wait_ksv_list(struct work_str= uct *work) struct it6505 *it6505 =3D container_of(work, struct it6505, hdcp_wait_ksv_list); struct device *dev =3D it6505->dev; - unsigned int timeout =3D 5000; + /* 1B-04 fail, wait to long to Stop encription(5s->2s). */ + unsigned int timeout =3D 2000; u8 bstatus =3D 0; bool ksv_list_check; =20 @@ -2085,21 +2114,18 @@ static void it6505_hdcp_wait_ksv_list(struct work_s= truct *work) =20 if (timeout =3D=3D 0) { DRM_DEV_DEBUG_DRIVER(dev, "timeout and ksv list wait failed"); - goto timeout; + goto hdcp_ksvlist_fail; } =20 ksv_list_check =3D it6505_hdcp_part2_ksvlist_check(it6505); DRM_DEV_DEBUG_DRIVER(dev, "ksv list ready, ksv list check %s", ksv_list_check ? "pass" : "fail"); - if (ksv_list_check) { - it6505_set_bits(it6505, REG_HDCP_TRIGGER, - HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE); + + if (ksv_list_check) return; - } -timeout: - it6505_set_bits(it6505, REG_HDCP_TRIGGER, - HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL, - HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL); + +hdcp_ksvlist_fail: + it6505_start_hdcp(it6505); } =20 static void it6505_hdcp_work(struct work_struct *work) @@ -2321,14 +2347,20 @@ static int it6505_process_hpd_irq(struct it6505 *it= 6505) DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector =3D 0x%02x", dp_irq_vector); =20 if (dp_irq_vector & DP_CP_IRQ) { - it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ, - HDCP_TRIGGER_CPIRQ); - bstatus =3D it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS); if (bstatus < 0) return bstatus; =20 DRM_DEV_DEBUG_DRIVER(dev, "Bstatus =3D 0x%02x", bstatus); + + /*1B-02 ignore when bstatus is 0 */ + if (bstatus & DP_BSTATUS_R0_PRIME_READY && + it6505->hdcp_status =3D=3D HDCP_AUTH_GOING) + it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ, + HDCP_TRIGGER_CPIRQ); + else if (bstatus & (DP_BSTATUS_REAUTH_REQ | DP_BSTATUS_LINK_FAILURE) && + it6505->hdcp_status =3D=3D HDCP_AUTH_DONE) + it6505_start_hdcp(it6505); } =20 ret =3D drm_dp_dpcd_read_link_status(&it6505->aux, link_status); @@ -2465,7 +2497,11 @@ static void it6505_irq_hdcp_ksv_check(struct it6505 = *it6505) { struct device *dev =3D it6505->dev; =20 - DRM_DEV_DEBUG_DRIVER(dev, "HDCP event Interrupt"); + DRM_DEV_DEBUG_DRIVER(dev, "HDCP repeater R0 event Interrupt"); + /* 1B01 HDCP encription should start when R0 is ready*/ + it6505_set_bits(it6505, REG_HDCP_TRIGGER, + HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE); + schedule_work(&it6505->hdcp_wait_ksv_list); } =20 --=20 2.34.1 From nobody Sun Feb 8 18:03:24 2026 Received: from ironport.ite.com.tw (60-251-196-230.hinet-ip.hinet.net [60.251.196.230]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E92A5194AEC for ; Mon, 23 Sep 2024 09:49:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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23 Sep 2024 17:49:26 +0800 Received: from tpemail1.internal.ite.com.tw (TPEMAIL1.internal.ite.com.tw [192.168.15.58]) by mse.ite.com.tw with ESMTP id 48N9nL9X009956; Mon, 23 Sep 2024 17:49:21 +0800 (GMT-8) (envelope-from Hermes.Wu@ite.com.tw) Received: from LAPTOP-C4GM1L3U.localdomain (192.168.82.6) by TPEMAIL1.internal.ite.com.tw (192.168.15.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Mon, 23 Sep 2024 17:49:22 +0800 From: Hermes Wu To: Pin-yen Lin CC: Kenneth Hung , Hermes Wu , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , "open list:DRM DRIVERS" , open list Subject: [PATCH v3 3/3] drm/bridge: it6505: Add MCCS support Date: Mon, 23 Sep 2024 17:48:29 +0800 Message-ID: <20240923094826.13471-4-Hermes.Wu@ite.com.tw> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240923094826.13471-1-Hermes.Wu@ite.com.tw> References: <20240923094826.13471-1-Hermes.Wu@ite.com.tw> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: TPEMAIL1.internal.ite.com.tw (192.168.15.58) To TPEMAIL1.internal.ite.com.tw (192.168.15.58) X-TM-SNTS-SMTP: 7AD907A668179B66F6455DA4539AD86930ECA0D11160D6878A7B91562EB105102002:8 X-MAIL: mse.ite.com.tw 48N9nL9X009956 Content-Type: text/plain; charset="utf-8" From: Hermes Wu Changes in v3: -remove non used definition for aux i2x cmd reply Add Aux-I2C functionality to support MCCS. Signed-off-by: Hermes Wu --- drivers/gpu/drm/bridge/ite-it6505.c | 174 +++++++++++++++++++++++++++- 1 file changed, 172 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/i= te-it6505.c index 156440c6517e..5aedc5570739 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -125,6 +125,9 @@ #define REG_AUX_ADR_16_19 0x26 #define REG_AUX_OUT_DATA0 0x27 =20 +#define REG_AUX_I2C_ADR 0x25 +#define REG_AUX_I2C_OP 0x26 + #define REG_AUX_CMD_REQ 0x2B #define AUX_BUSY BIT(5) =20 @@ -266,6 +269,19 @@ #define REG_SSC_CTRL1 0x189 #define REG_SSC_CTRL2 0x18A =20 +#define REG_AUX_USER_CTRL 0x190 +#define EN_USER_AUX BIT(0) +#define USER_AUX_DONE BIT(1) +#define AUX_EVENT BIT(4) + +#define REG_AUX_USER_DATA_REC 0x191 +#define M_AUX_IN_REC 0xF0 +#define M_AUX_OUT_REC 0x0F + +#define REG_AUX_USER_TXB 0x190 +#define REG_AUX_USER_REPLY 0x19A +#define REG_AUX_USER_RXB(n) (n + 0x19B) + #define RBR DP_LINK_BW_1_62 #define HBR DP_LINK_BW_2_7 #define HBR2 DP_LINK_BW_5_4 @@ -301,6 +317,8 @@ #define MAX_EQ_LEVEL 0x03 #define AUX_WAIT_TIMEOUT_MS 15 #define AUX_FIFO_MAX_SIZE 16 +#define AUX_I2C_MAX_SIZE 4 +#define AUX_I2C_DEFER_RETRY 4 #define PIXEL_CLK_DELAY 1 #define PIXEL_CLK_INVERSE 0 #define ADJUST_PHASE_THRESHOLD 80000 @@ -323,7 +341,12 @@ enum aux_cmd_type { CMD_AUX_NATIVE_READ =3D 0x0, CMD_AUX_NATIVE_WRITE =3D 0x5, + CMD_AUX_GI2C_ADR =3D 0x08, + CMD_AUX_GI2C_READ =3D 0x09, + CMD_AUX_GI2C_WRITE =3D 0x0A, CMD_AUX_I2C_EDID_READ =3D 0xB, + CMD_AUX_I2C_READ =3D 0x0D, + CMD_AUX_I2C_WRITE =3D 0x0C, =20 /* KSV list read using AUX native read with FIFO */ CMD_AUX_GET_KSV_LIST =3D 0x10, @@ -1106,6 +1129,154 @@ static ssize_t it6505_aux_do_transfer(struct it6505= *it6505, return ret; } =20 +static int it6505_aux_i2c_wait(struct it6505 *it6505, u8 *reply) +{ + int err =3D 0; + unsigned long timeout; + struct device *dev =3D it6505->dev; + + timeout =3D jiffies + msecs_to_jiffies(AUX_WAIT_TIMEOUT_MS) + 1; + + do { + if (it6505_read(it6505, REG_AUX_USER_CTRL) & AUX_EVENT) + break; + if (time_after(jiffies, timeout)) { + dev_err(dev, "Timed out waiting AUX I2C, BUSY =3D %X\n", + it6505_aux_op_finished(it6505)); + err =3D -ETIMEDOUT; + goto end_aux_i2c_wait; + } + usleep_range(300, 800); + } while (!it6505_aux_op_finished(it6505)); + + if (!reply) + goto end_aux_i2c_wait; + + *reply =3D it6505_read(it6505, REG_AUX_USER_REPLY) >> 4; + + if (*reply =3D=3D 0) + goto end_aux_i2c_wait; + + if ((*reply =3D=3D DP_AUX_NATIVE_REPLY_DEFER) || + (*reply =3D=3D DP_AUX_I2C_REPLY_DEFER)) + err =3D -EBUSY; + else if ((*reply =3D=3D DP_AUX_NATIVE_REPLY_NACK) || + (*reply =3D=3D DP_AUX_I2C_REPLY_NACK)) + err =3D -ENXIO; + +end_aux_i2c_wait: + it6505_set_bits(it6505, REG_AUX_USER_CTRL, USER_AUX_DONE, USER_AUX_DONE); + return err; +} + +static int it6505_aux_i2c_readb(struct it6505 *it6505, u8 *buf, size_t siz= e, u8 *reply) +{ + int ret, i; + int retry =3D 0; + + for (retry =3D 0; retry < AUX_I2C_DEFER_RETRY; retry++) { + it6505_write(it6505, REG_AUX_CMD_REQ, CMD_AUX_GI2C_READ); + ret =3D it6505_aux_i2c_wait(it6505, reply); + if ((*reply =3D=3D DP_AUX_NATIVE_REPLY_DEFER) || + (*reply =3D=3D DP_AUX_I2C_REPLY_DEFER)) + continue; + if (ret >=3D 0) + break; + } + + for (i =3D 0; i < size; i++) + buf[i] =3D (u8)it6505_read(it6505, REG_AUX_USER_RXB(0 + i)); + + return size; +} + +static int it6505_aux_i2c_writeb(struct it6505 *it6505, u8 *buf, size_t si= ze, u8 *reply) +{ + int i, ret; + int retry =3D 0; + + for (i =3D 0; i < size; i++) + it6505_write(it6505, REG_AUX_OUT_DATA0 + i, buf[i]); + + for (retry =3D 0; retry < AUX_I2C_DEFER_RETRY; retry++) { + it6505_write(it6505, REG_AUX_CMD_REQ, CMD_AUX_GI2C_WRITE); + ret =3D it6505_aux_i2c_wait(it6505, reply); + if ((*reply =3D=3D DP_AUX_NATIVE_REPLY_DEFER) || + (*reply =3D=3D DP_AUX_I2C_REPLY_DEFER)) + continue; + if (ret >=3D 0) + break; + } + return size; +} + +static ssize_t it6505_aux_i2c_operation(struct it6505 *it6505, + struct drm_dp_aux_msg *msg) +{ + int ret; + ssize_t request_size, data_cnt =3D 0; + u8 *buffer =3D msg->buffer; + + /* set AUX user mode */ + it6505_set_bits(it6505, REG_AUX_CTRL, + AUX_USER_MODE | AUX_NO_SEGMENT_WR, AUX_USER_MODE); + it6505_set_bits(it6505, REG_AUX_USER_CTRL, EN_USER_AUX, EN_USER_AUX); + /* clear AUX FIFO */ + it6505_set_bits(it6505, REG_AUX_CTRL, + AUX_EN_FIFO_READ | CLR_EDID_FIFO, + AUX_EN_FIFO_READ | CLR_EDID_FIFO); + + it6505_set_bits(it6505, REG_AUX_CTRL, + AUX_EN_FIFO_READ | CLR_EDID_FIFO, 0x00); + + it6505_write(it6505, REG_AUX_ADR_0_7, 0x00); + it6505_write(it6505, REG_AUX_I2C_ADR, msg->address << 1); + + if (msg->size =3D=3D 0) { + /* IIC Start/STOP dummy write */ + it6505_write(it6505, REG_AUX_I2C_OP, msg->request); + it6505_write(it6505, REG_AUX_CMD_REQ, CMD_AUX_GI2C_ADR); + ret =3D it6505_aux_i2c_wait(it6505, &msg->reply); + goto end_aux_i2c_transfer; + } + + /* IIC data transfer */ + for (data_cnt =3D 0; data_cnt < msg->size; ) { + request_size =3D min_t(ssize_t, msg->size - data_cnt, AUX_I2C_MAX_SIZE); + it6505_write(it6505, REG_AUX_I2C_OP, + msg->request | ((request_size - 1) << 4)); + if ((msg->request & DP_AUX_I2C_READ) =3D=3D DP_AUX_I2C_READ) + ret =3D it6505_aux_i2c_readb(it6505, &buffer[data_cnt], + request_size, &msg->reply); + else + ret =3D it6505_aux_i2c_writeb(it6505, &buffer[data_cnt], + request_size, &msg->reply); + + if (ret < 0) + goto end_aux_i2c_transfer; + + data_cnt +=3D request_size; + } + ret =3D data_cnt; +end_aux_i2c_transfer: + + it6505_set_bits(it6505, REG_AUX_USER_CTRL, EN_USER_AUX, 0); + it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, 0); + return ret; +} + +static ssize_t it6505_aux_i2c_transfer(struct drm_dp_aux *aux, + struct drm_dp_aux_msg *msg) +{ + struct it6505 *it6505 =3D container_of(aux, struct it6505, aux); + int ret; + + mutex_lock(&it6505->aux_lock); + ret =3D it6505_aux_i2c_operation(it6505, msg); + mutex_unlock(&it6505->aux_lock); + return ret; +} + static ssize_t it6505_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { @@ -1115,9 +1286,8 @@ static ssize_t it6505_aux_transfer(struct drm_dp_aux = *aux, int ret; enum aux_cmd_reply reply; =20 - /* IT6505 doesn't support arbitrary I2C read / write. */ if (is_i2c) - return -EINVAL; + return it6505_aux_i2c_transfer(aux, msg); =20 switch (msg->request) { case DP_AUX_NATIVE_READ: --=20 2.34.1