From patchwork Thu Nov 12 12:21:42 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: 7601641 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 3EDD7C05CA for ; Thu, 12 Nov 2015 12:31:59 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EA27C2077A for ; Thu, 12 Nov 2015 12:31:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7DC8420767 for ; Thu, 12 Nov 2015 12:31:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753156AbbKLMbx (ORCPT ); Thu, 12 Nov 2015 07:31:53 -0500 Received: from aer-iport-2.cisco.com ([173.38.203.52]:55981 "EHLO aer-iport-2.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753095AbbKLMbx (ORCPT ); Thu, 12 Nov 2015 07:31:53 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=11470; q=dns/txt; s=iport; t=1447331512; x=1448541112; h=from:to:cc:subject:date:message-id; bh=N7D1g38Pzw5bknq7NqjkPNCCW8gP8Ea+HwuG/9aoT2s=; b=fZ3fd8v0oaBEpSHsh7E20Pk8obwTjIhKxP1Uq1vj6ek79WUoinssrs8S Jpfwd5hYsGaLXjkziEz25HKTzJkmnJCH7DR+hKLQ73QxBMAIvmml2zNPC vLTZ8oAOdjPZklpt/3/k5sIKXADA1C1G5dhQntsRTmrZsSje7Y1XsCggo s=; X-IronPort-AV: E=Sophos;i="5.20,281,1444694400"; d="scan'208";a="612758196" Received: from aer-iport-nat.cisco.com (HELO aer-core-4.cisco.com) ([173.38.203.22]) by aer-iport-2.cisco.com with ESMTP; 12 Nov 2015 12:22:03 +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 tACCLvMD009470; Thu, 12 Nov 2015 12:22:03 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 13/16] cec: adv7842: add cec support Date: Thu, 12 Nov 2015 13:21:42 +0100 Message-Id: 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 adv7842 driver. Signed-off-by: Hans Verkuil --- drivers/media/i2c/adv7842.c | 255 +++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 238 insertions(+), 17 deletions(-) diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c index b7269b8..0f29b33 100644 --- a/drivers/media/i2c/adv7842.c +++ b/drivers/media/i2c/adv7842.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include #include @@ -79,6 +80,8 @@ MODULE_LICENSE("GPL"); #define ADV7842_OP_SWAP_CB_CR (1 << 0) +#define ADV7842_MAX_ADDRS (3) + /* ********************************************************************** * @@ -142,6 +145,10 @@ struct adv7842_state { struct v4l2_ctrl *free_run_color_ctrl_manual; struct v4l2_ctrl *free_run_color_ctrl; struct v4l2_ctrl *rgb_quantization_range_ctrl; + + u8 cec_addr[ADV7842_MAX_ADDRS]; + u8 cec_valid_addrs; + bool cec_enabled_adap; }; /* Unsupported timings. This device cannot support 720p30. */ @@ -418,9 +425,9 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val) return adv_smbus_write_byte_data(state->i2c_cec, reg, val); } -static inline int cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 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); + return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val); } static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg) @@ -696,6 +703,18 @@ adv7842_get_dv_timings_cap(struct v4l2_subdev *sd) /* ----------------------------------------------------------------------- */ +static u16 adv7842_read_cable_det(struct v4l2_subdev *sd) +{ + u8 reg = io_read(sd, 0x6f); + u16 val = 0; + + if (reg & 0x02) + val |= 1; /* port A */ + if (reg & 0x01) + val |= 2; /* port B */ + return val; +} + static void adv7842_delayed_work_enable_hotplug(struct work_struct *work) { struct delayed_work *dwork = to_delayed_work(work); @@ -703,8 +722,13 @@ static void adv7842_delayed_work_enable_hotplug(struct work_struct *work) struct adv7842_state, delayed_work_enable_hotplug); struct v4l2_subdev *sd = &state->sd; int present = state->hdmi_edid.present; + u16 connected_inputs; u8 mask = 0; + connected_inputs = present & adv7842_read_cable_det(sd); + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_CONN_INPUTS, + &connected_inputs); + v4l2_dbg(2, debug, sd, "%s: enable hotplug on ports: 0x%x\n", __func__, present); @@ -983,20 +1007,16 @@ static int adv7842_s_register(struct v4l2_subdev *sd, static int adv7842_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd) { struct adv7842_state *state = to_state(sd); - int prev = v4l2_ctrl_g_ctrl(state->detect_tx_5v_ctrl); - u8 reg_io_6f = io_read(sd, 0x6f); - int val = 0; + u16 cable_det = adv7842_read_cable_det(sd); + u16 connected_inputs; - if (reg_io_6f & 0x02) - val |= 1; /* port A */ - if (reg_io_6f & 0x01) - val |= 2; /* port B */ + v4l2_dbg(1, debug, sd, "%s: 0x%x\n", __func__, cable_det); - v4l2_dbg(1, debug, sd, "%s: 0x%x -> 0x%x\n", __func__, prev, val); + connected_inputs = state->hdmi_edid.present & cable_det; + v4l2_subdev_notify(sd, V4L2_SUBDEV_CEC_CONN_INPUTS, + &connected_inputs); - if (val != prev) - return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, val); - return 0; + return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det); } static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd, @@ -2157,6 +2177,183 @@ static void adv7842_irq_enable(struct v4l2_subdev *sd, bool enable) } } +static void adv7842_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 adv7842_cec_isr(struct v4l2_subdev *sd, bool *handled) +{ + u8 cec_irq; + + /* cec controller */ + cec_irq = io_read(sd, 0x93) & 0x0f; + if (!cec_irq) + return; + + v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq); + adv7842_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); + } + } + + io_write(sd, 0x94, cec_irq); + + if (handled) + *handled = true; +} + +static unsigned adv7842_cec_available_log_addrs(struct v4l2_subdev *sd) +{ + return ADV7842_MAX_ADDRS; +} + +static int adv7842_cec_enable(struct v4l2_subdev *sd, bool enable) +{ + struct adv7842_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, 0x96, 0x0f, 0x0f); + cec_write(sd, 0x26, 0x01); /* enable rx */ + } else if (state->cec_enabled_adap && !enable) { + /* disable cec interrupts */ + io_write_clr_set(sd, 0x96, 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; + return 0; +} + +static int adv7842_cec_log_addr(struct v4l2_subdev *sd, u8 addr) +{ + struct adv7842_state *state = to_state(sd); + unsigned i, free_idx = ADV7842_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 < ADV7842_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (free_idx == ADV7842_MAX_ADDRS && !is_valid) + free_idx = i; + if (is_valid && state->cec_addr[i] == addr) + return 0; + } + if (i == ADV7842_MAX_ADDRS) { + i = free_idx; + if (i == ADV7842_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 adv7842_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 adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled) { struct adv7842_state *state = to_state(sd); @@ -2228,6 +2425,9 @@ static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled) *handled = true; } + /* cec */ + adv7842_cec_isr(sd, handled); + /* tx 5v detect */ if (irq_status[2] & 0x3) { v4l2_dbg(1, debug, sd, "%s: irq tx_5v\n", __func__); @@ -2308,10 +2508,12 @@ static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *e) case ADV7842_EDID_PORT_A: case ADV7842_EDID_PORT_B: memset(&state->hdmi_edid.edid, 0, 256); - if (e->blocks) + if (e->blocks) { state->hdmi_edid.present |= 0x04 << e->pad; - else + } else { state->hdmi_edid.present &= ~(0x04 << e->pad); + adv7842_s_detect_tx_5v_ctrl(sd); + } memcpy(&state->hdmi_edid.edid, e->edid, 128 * e->blocks); err = edid_write_hdmi_segment(sd, e->pad); break; @@ -2496,8 +2698,19 @@ static int adv7842_cp_log_status(struct v4l2_subdev *sd) v4l2_info(sd, "HPD A %s, B %s\n", reg_io_0x21 & 0x02 ? "enabled" : "disabled", reg_io_0x21 & 0x01 ? "enabled" : "disabled"); - 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 < ADV7842_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"); if (state->hdmi_port_a) { @@ -3047,6 +3260,13 @@ static const struct v4l2_subdev_video_ops adv7842_video_ops = { .query_dv_timings = adv7842_query_dv_timings, }; +static const struct v4l2_subdev_cec_ops adv7842_cec_ops = { + .available_log_addrs = adv7842_cec_available_log_addrs, + .enable = adv7842_cec_enable, + .log_addr = adv7842_cec_log_addr, + .transmit = adv7842_cec_transmit, +}; + static const struct v4l2_subdev_pad_ops adv7842_pad_ops = { .enum_mbus_code = adv7842_enum_mbus_code, .get_fmt = adv7842_get_format, @@ -3061,6 +3281,7 @@ static const struct v4l2_subdev_ops adv7842_ops = { .core = &adv7842_core_ops, .video = &adv7842_video_ops, .pad = &adv7842_pad_ops, + .cec = &adv7842_cec_ops, }; /* -------------------------- custom ctrls ---------------------------------- */ @@ -3341,7 +3562,7 @@ static int adv7842_remove(struct i2c_client *client) struct adv7842_state *state = to_state(sd); adv7842_irq_enable(sd, false); - + adv7842_cec_enable(sd, false); cancel_delayed_work(&state->delayed_work_enable_hotplug); destroy_workqueue(state->work_queues); v4l2_device_unregister_subdev(sd);