From patchwork Thu Nov 12 12:21:41 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Hans Verkuil (hansverk)" X-Patchwork-Id: 7601791 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 603A0C05CA for ; Thu, 12 Nov 2015 12:32:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 12AE52078B for ; Thu, 12 Nov 2015 12:32:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E81392077A for ; Thu, 12 Nov 2015 12:32:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752853AbbKLMcM (ORCPT ); Thu, 12 Nov 2015 07:32:12 -0500 Received: from aer-iport-3.cisco.com ([173.38.203.53]:5647 "EHLO aer-iport-3.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753102AbbKLMcK (ORCPT ); Thu, 12 Nov 2015 07:32:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10904; q=dns/txt; s=iport; t=1447331529; x=1448541129; h=from:to:cc:subject:date:message-id; bh=xJMpAMmWTgUtapg7UfuZH59tPZuCAHxJq5LUz+ndE1k=; b=C+/ZRzo4m7vnhKZWypdfgir4vGohlVdz/lxPnf4RZKTcX0vyiet905P3 hMq6tch+IB0Q/BWvnf2KHfmuguG7cyYI7x9tqW5gJuowk+Vfrrly3745Z yarU1wooUd1wtwSVeGbsUiKd9cvNdDrG79OAEwem9FpODACv5FTZLL9rj E=; X-IronPort-AV: E=Sophos;i="5.20,281,1444694400"; d="scan'208";a="606276634" Received: from aer-iport-nat.cisco.com (HELO aer-core-4.cisco.com) ([173.38.203.22]) by aer-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Nov 2015 12:22:02 +0000 Received: from cobaltpc1.rd.cisco.com ([10.47.79.222]) by aer-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id tACCLvMC009470; Thu, 12 Nov 2015 12:22:02 GMT From: Hans Verkuil To: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org, linux-input@vger.kernel.org, linux-samsung-soc@vger.kernel.org, lars@opdenkamp.eu, linux@arm.linux.org.uk, Hans Verkuil Subject: [PATCHv10 12/16] cec: adv7604: add cec support. Date: Thu, 12 Nov 2015 13:21:41 +0100 Message-Id: <258bc5654ddf9f87ccb9987b70a9ec7a1b4f97ca.1447329279.git.hansverk@cisco.com> X-Mailer: git-send-email 2.6.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-14.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY, USER_IN_DEF_DKIM_WL autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hans Verkuil Add CEC support to the adv7604 driver. Signed-off-by: Hans Verkuil [k.debski@samsung.com: Merged changes from CEC Updates commit by Hans Verkuil] [k.debski@samsung.com: add missing methods cec/io_write_and_or] [k.debski@samsung.com: change adv7604 to adv76xx in added functions] [hansverk@cisco.com: use _clr_set instead of _and_or] --- drivers/media/i2c/adv7604.c | 241 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 237 insertions(+), 4 deletions(-) diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index 5631ec0..f039ae6 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -40,6 +40,7 @@ #include #include +#include #include #include #include @@ -80,6 +81,8 @@ MODULE_LICENSE("GPL"); #define ADV76XX_OP_SWAP_CB_CR (1 << 0) +#define ADV76XX_MAX_ADDRS (3) + enum adv76xx_type { ADV7604, ADV7611, @@ -184,6 +187,10 @@ struct adv76xx_state { u16 spa_port_a[2]; struct v4l2_fract aspect_ratio; u32 rgb_quantization_range; + u8 cec_addr[ADV76XX_MAX_ADDRS]; + u8 cec_valid_addrs; + bool cec_enabled_adap; + struct workqueue_struct *work_queues; struct delayed_work delayed_work_enable_hotplug; bool restart_stdi_once; @@ -430,7 +437,8 @@ static inline int io_write(struct v4l2_subdev *sd, u8 reg, u8 val) return regmap_write(state->regmap[ADV76XX_PAGE_IO], reg, val); } -static inline int io_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val) +static inline int io_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, + u8 val) { return io_write(sd, reg, (io_read(sd, reg) & ~mask) | val); } @@ -463,6 +471,12 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val) return regmap_write(state->regmap[ADV76XX_PAGE_CEC], reg, val); } +static inline int cec_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, + u8 val) +{ + return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val); +} + static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg) { struct adv76xx_state *state = to_state(sd); @@ -550,8 +564,13 @@ static inline int edid_write_block(struct v4l2_subdev *sd, static void adv76xx_set_hpd(struct adv76xx_state *state, unsigned int hpd) { + u16 connected_inputs; unsigned int i; + connected_inputs = hpd & state->info->read_cable_det(&state->sd); + v4l2_subdev_notify(&state->sd, V4L2_SUBDEV_CEC_CONN_INPUTS, + &connected_inputs); + for (i = 0; i < state->info->num_dv_ports; ++i) gpiod_set_value_cansleep(state->hpd_gpio[i], hpd & BIT(i)); @@ -891,9 +910,12 @@ static int adv76xx_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd) { struct adv76xx_state *state = to_state(sd); const struct adv76xx_chip_info *info = state->info; + u16 cable_det = info->read_cable_det(sd); + u16 connected_inputs = state->edid.present & cable_det; - return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, - info->read_cable_det(sd)); + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_CONN_INPUTS, + &connected_inputs); + return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det); } static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd, @@ -1914,6 +1936,187 @@ static int adv76xx_set_format(struct v4l2_subdev *sd, return 0; } +static void adv76xx_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status) +{ + if ((cec_read(sd, 0x11) & 0x01) == 0) { + v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__); + return; + } + + if (tx_raw_status & 0x02) { + v4l2_dbg(1, debug, sd, "%s: tx raw: arbitration lost\n", + __func__); + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_TX_DONE, + (void *)CEC_TX_STATUS_ARB_LOST); + return; + } + if (tx_raw_status & 0x04) { + v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__); + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_TX_DONE, + (void *)CEC_TX_STATUS_RETRY_TIMEOUT); + return; + } + if (tx_raw_status & 0x01) { + v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__); + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_TX_DONE, + (void *)CEC_TX_STATUS_OK); + return; + } +} + +static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled) +{ + u8 cec_irq; + + /* cec controller */ + cec_irq = io_read(sd, 0x4d) & 0x0f; + if (!cec_irq) + return; + + v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq); + adv76xx_cec_tx_raw_status(sd, cec_irq); + if (cec_irq & 0x08) { + struct cec_msg msg; + + msg.len = cec_read(sd, 0x25) & 0x1f; + if (msg.len > 16) + msg.len = 16; + + if (msg.len) { + u8 i; + + for (i = 0; i < msg.len; i++) + msg.msg[i] = cec_read(sd, i + 0x15); + cec_write(sd, 0x26, 0x01); /* re-enable rx */ + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_RX_MSG, &msg); + } + } + + /* note: the bit order is swapped between 0x4d and 0x4e */ + cec_irq = ((cec_irq & 0x08) >> 3) | ((cec_irq & 0x04) >> 1) | + ((cec_irq & 0x02) << 1) | ((cec_irq & 0x01) << 3); + io_write(sd, 0x4e, cec_irq); + + if (handled) + *handled = true; +} + +static unsigned adv76xx_cec_available_log_addrs(struct v4l2_subdev *sd) +{ + return ADV76XX_MAX_ADDRS; +} + +static int adv76xx_cec_enable(struct v4l2_subdev *sd, bool enable) +{ + struct adv76xx_state *state = to_state(sd); + + if (!state->cec_enabled_adap && enable) { + cec_write_clr_set(sd, 0x2a, 0x01, 0x01); /* power up cec */ + cec_write(sd, 0x2c, 0x01); /* cec soft reset */ + cec_write_clr_set(sd, 0x11, 0x01, 0); /* initially disable tx */ + /* enabled irqs: */ + /* tx: ready */ + /* tx: arbitration lost */ + /* tx: retry timeout */ + /* rx: ready */ + io_write_clr_set(sd, 0x50, 0x0f, 0x0f); + cec_write(sd, 0x26, 0x01); /* enable rx */ + } else if (state->cec_enabled_adap && !enable) { + /* disable cec interrupts */ + io_write_clr_set(sd, 0x50, 0x0f, 0x00); + /* disable address mask 1-3 */ + cec_write_clr_set(sd, 0x27, 0x70, 0x00); + /* power down cec section */ + cec_write_clr_set(sd, 0x2a, 0x01, 0x00); + state->cec_valid_addrs = 0; + } + state->cec_enabled_adap = enable; + adv76xx_s_detect_tx_5v_ctrl(sd); + return 0; +} + +static int adv76xx_cec_log_addr(struct v4l2_subdev *sd, u8 addr) +{ + struct adv76xx_state *state = to_state(sd); + unsigned i, free_idx = ADV76XX_MAX_ADDRS; + + if (!state->cec_enabled_adap) + return -EIO; + + if (addr == CEC_LOG_ADDR_INVALID) { + cec_write_clr_set(sd, 0x27, 0x70, 0); + state->cec_valid_addrs = 0; + return 0; + } + + for (i = 0; i < ADV76XX_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (free_idx == ADV76XX_MAX_ADDRS && !is_valid) + free_idx = i; + if (is_valid && state->cec_addr[i] == addr) + return 0; + } + if (i == ADV76XX_MAX_ADDRS) { + i = free_idx; + if (i == ADV76XX_MAX_ADDRS) + return -ENXIO; + } + state->cec_addr[i] = addr; + state->cec_valid_addrs |= 1 << i; + + switch (i) { + case 0: + /* enable address mask 0 */ + cec_write_clr_set(sd, 0x27, 0x10, 0x10); + /* set address for mask 0 */ + cec_write_clr_set(sd, 0x28, 0x0f, addr); + break; + case 1: + /* enable address mask 1 */ + cec_write_clr_set(sd, 0x27, 0x20, 0x20); + /* set address for mask 1 */ + cec_write_clr_set(sd, 0x28, 0xf0, addr << 4); + break; + case 2: + /* enable address mask 2 */ + cec_write_clr_set(sd, 0x27, 0x40, 0x40); + /* set address for mask 1 */ + cec_write_clr_set(sd, 0x29, 0x0f, addr); + break; + } + return 0; +} + +static int adv76xx_cec_transmit(struct v4l2_subdev *sd, u32 timeout_ms, + u8 retries, struct cec_msg *msg) +{ + u8 len = msg->len; + unsigned i; + + if (len == 1) + /* allow for one retry for polling */ + cec_write_clr_set(sd, 0x12, 0x07, 1); + else + /* allow for three retries */ + cec_write_clr_set(sd, 0x12, 0x07, 3); + + if (len > 16) { + v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len); + return -EINVAL; + } + + /* write data */ + for (i = 0; i < len; i++) + cec_write(sd, i, msg->msg[i]); + + /* set length (data + header) */ + cec_write(sd, 0x10, len); + /* start transmit, enable tx */ + cec_write(sd, 0x11, 0x01); + return 0; +} + static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled) { struct adv76xx_state *state = to_state(sd); @@ -1959,6 +2162,9 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled) *handled = true; } + /* cec */ + adv76xx_cec_isr(sd, handled); + /* tx 5v detect */ tx_5v = io_read(sd, 0x70) & info->cable_det_mask; if (tx_5v) { @@ -2266,8 +2472,19 @@ static int adv76xx_log_status(struct v4l2_subdev *sd) ((edid_enabled & 0x02) ? "Yes" : "No"), ((edid_enabled & 0x04) ? "Yes" : "No"), ((edid_enabled & 0x08) ? "Yes" : "No")); - v4l2_info(sd, "CEC: %s\n", !!(cec_read(sd, 0x2a) & 0x01) ? + v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ? "enabled" : "disabled"); + if (state->cec_enabled_adap) { + int i; + + for (i = 0; i < ADV76XX_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (is_valid) + v4l2_info(sd, "CEC Logical Address: 0x%x\n", + state->cec_addr[i]); + } + } v4l2_info(sd, "-----Signal status-----\n"); cable_det = info->read_cable_det(sd); @@ -2402,6 +2619,13 @@ static const struct v4l2_subdev_video_ops adv76xx_video_ops = { .query_dv_timings = adv76xx_query_dv_timings, }; +static const struct v4l2_subdev_cec_ops adv76xx_cec_ops = { + .available_log_addrs = adv76xx_cec_available_log_addrs, + .enable = adv76xx_cec_enable, + .log_addr = adv76xx_cec_log_addr, + .transmit = adv76xx_cec_transmit, +}; + static const struct v4l2_subdev_pad_ops adv76xx_pad_ops = { .enum_mbus_code = adv76xx_enum_mbus_code, .get_fmt = adv76xx_get_format, @@ -2416,6 +2640,7 @@ static const struct v4l2_subdev_ops adv76xx_ops = { .core = &adv76xx_core_ops, .video = &adv76xx_video_ops, .pad = &adv76xx_pad_ops, + .cec = &adv76xx_cec_ops, }; /* -------------------------- custom ctrls ---------------------------------- */ @@ -3249,6 +3474,14 @@ static int adv76xx_remove(struct i2c_client *client) struct v4l2_subdev *sd = i2c_get_clientdata(client); struct adv76xx_state *state = to_state(sd); + /* disable interrupts */ + io_write(sd, 0x40, 0); + io_write(sd, 0x41, 0); + io_write(sd, 0x46, 0); + io_write(sd, 0x6e, 0); + io_write(sd, 0x73, 0); + adv76xx_cec_enable(sd, false); + cancel_delayed_work(&state->delayed_work_enable_hotplug); destroy_workqueue(state->work_queues); v4l2_async_unregister_subdev(sd);