From patchwork Tue Jan 19 09:39:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 367391 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5854DC4332D for ; Tue, 19 Jan 2021 22:40:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A6DD22D08 for ; Tue, 19 Jan 2021 22:40:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387752AbhASOge (ORCPT ); Tue, 19 Jan 2021 09:36:34 -0500 Received: from www.zeus03.de ([194.117.254.33]:55088 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387693AbhASJkZ (ORCPT ); Tue, 19 Jan 2021 04:40:25 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=k1; bh=1V+YeFI2dhLbdh a8QK5vAA8wcMmioJd9L4yOtd0w7DM=; b=naTxYIkcHy5MTF5FF23ZZtZ2GNSaz7 FU/dFDRK5W7nrpy9bqD73erJkovVPKFVm5YKxWSo9H/yd4W/D+l98CjQ49Gxv8j6 YH8clt89jPe+vpkwgyuvD33ZVDERQ76plV4HrsqIGCMhOg2J4F4Cv3HEPOJy7Gc9 amsu90IrAVsVk= Received: (qmail 1003486 invoked from network); 19 Jan 2021 10:39:20 +0100 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 19 Jan 2021 10:39:20 +0100 X-UD-Smtp-Session: l3s3148p1@pSHinD257tkgAwDPXyX1ACWcscxtZ2TX From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Wolfram Sang , Hans Verkuil , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/3] media: i2c: adv7842: remove open coded version of SMBus block write Date: Tue, 19 Jan 2021 10:39:08 +0100 Message-Id: <20210119093912.1838-2-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> References: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The version here is identical to the one in the I2C core, so use the latter version directly. Signed-off-by: Wolfram Sang Reviewed-by: Hans Verkuil --- Changes since RFC: * skip define, use i2c_smbus_write_i2c_block_data directly drivers/media/i2c/adv7842.c | 24 +++++------------------- 1 file changed, 5 insertions(+), 19 deletions(-) diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c index 0855f648416d..e0629d5ef17b 100644 --- a/drivers/media/i2c/adv7842.c +++ b/drivers/media/i2c/adv7842.c @@ -343,20 +343,6 @@ static void adv_smbus_write_byte_no_check(struct i2c_client *client, I2C_SMBUS_BYTE_DATA, &data); } -static s32 adv_smbus_write_i2c_block_data(struct i2c_client *client, - u8 command, unsigned length, const u8 *values) -{ - union i2c_smbus_data data; - - if (length > I2C_SMBUS_BLOCK_MAX) - length = I2C_SMBUS_BLOCK_MAX; - data.block[0] = length; - memcpy(data.block + 1, values, length); - return i2c_smbus_xfer(client->adapter, client->addr, client->flags, - I2C_SMBUS_WRITE, command, - I2C_SMBUS_I2C_BLOCK_DATA, &data); -} - /* ----------------------------------------------------------------------- */ static inline int io_read(struct v4l2_subdev *sd, u8 reg) @@ -741,7 +727,7 @@ static int edid_write_vga_segment(struct v4l2_subdev *sd) rep_write_and_or(sd, 0x77, 0xef, 0x10); for (i = 0; !err && i < 256; i += I2C_SMBUS_BLOCK_MAX) - err = adv_smbus_write_i2c_block_data(state->i2c_edid, i, + err = i2c_smbus_write_i2c_block_data(state->i2c_edid, i, I2C_SMBUS_BLOCK_MAX, val + i); if (err) return err; @@ -807,7 +793,7 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port) rep_write_and_or(sd, 0x77, 0xef, 0x00); for (i = 0; !err && i < 256; i += I2C_SMBUS_BLOCK_MAX) - err = adv_smbus_write_i2c_block_data(state->i2c_edid, i, + err = i2c_smbus_write_i2c_block_data(state->i2c_edid, i, I2C_SMBUS_BLOCK_MAX, edid + i); if (err) return err; @@ -1079,7 +1065,7 @@ static void configure_custom_video_timings(struct v4l2_subdev *sd, /* Should only be set in auto-graphics mode [REF_02, p. 91-92] */ /* setup PLL_DIV_MAN_EN and PLL_DIV_RATIO */ /* IO-map reg. 0x16 and 0x17 should be written in sequence */ - if (adv_smbus_write_i2c_block_data(client, 0x16, 2, pll)) { + if (i2c_smbus_write_i2c_block_data(client, 0x16, 2, pll)) { v4l2_err(sd, "writing to reg 0x16 and 0x17 failed\n"); break; } @@ -1135,7 +1121,7 @@ static void adv7842_set_offset(struct v4l2_subdev *sd, bool auto_offset, u16 off offset_buf[3] = offset_c & 0x0ff; /* Registers must be written in this order with no i2c access in between */ - if (adv_smbus_write_i2c_block_data(state->i2c_cp, 0x77, 4, offset_buf)) + if (i2c_smbus_write_i2c_block_data(state->i2c_cp, 0x77, 4, offset_buf)) v4l2_err(sd, "%s: i2c error writing to CP reg 0x77, 0x78, 0x79, 0x7a\n", __func__); } @@ -1164,7 +1150,7 @@ static void adv7842_set_gain(struct v4l2_subdev *sd, bool auto_gain, u16 gain_a, gain_buf[3] = ((gain_c & 0x0ff)); /* Registers must be written in this order with no i2c access in between */ - if (adv_smbus_write_i2c_block_data(state->i2c_cp, 0x73, 4, gain_buf)) + if (i2c_smbus_write_i2c_block_data(state->i2c_cp, 0x73, 4, gain_buf)) v4l2_err(sd, "%s: i2c error writing to CP reg 0x73, 0x74, 0x75, 0x76\n", __func__); } From patchwork Tue Jan 19 09:39:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 366464 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D548FC4332B for ; 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19 Jan 2021 10:39:20 +0100 X-UD-Smtp-Session: l3s3148p1@VA3tnD258NkgAwDPXyX1ACWcscxtZ2TX From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Wolfram Sang , Hans Verkuil , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] media: i2c: adv7511: remove open coded version of SMBus block read Date: Tue, 19 Jan 2021 10:39:09 +0100 Message-Id: <20210119093912.1838-3-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> References: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The open coded version differs from the one in the core in one way: the buffer will be always copied back, even when the transfer failed. Be more robust: use the block read from the I2C core and propagate a potential errno further to the sanity checks. Signed-off-by: Wolfram Sang --- Changes since RFC: * removed wrong assumption from the commit message drivers/media/i2c/adv7511-v4l2.c | 41 ++++++++++++-------------------- 1 file changed, 15 insertions(+), 26 deletions(-) diff --git a/drivers/media/i2c/adv7511-v4l2.c b/drivers/media/i2c/adv7511-v4l2.c index a3161d709015..441bafa743a6 100644 --- a/drivers/media/i2c/adv7511-v4l2.c +++ b/drivers/media/i2c/adv7511-v4l2.c @@ -214,36 +214,25 @@ static inline void adv7511_wr_and_or(struct v4l2_subdev *sd, u8 reg, u8 clr_mask adv7511_wr(sd, reg, (adv7511_rd(sd, reg) & clr_mask) | val_mask); } -static int adv_smbus_read_i2c_block_data(struct i2c_client *client, - u8 command, unsigned length, u8 *values) -{ - union i2c_smbus_data data; - int ret; - - if (length > I2C_SMBUS_BLOCK_MAX) - length = I2C_SMBUS_BLOCK_MAX; - data.block[0] = length; - - ret = i2c_smbus_xfer(client->adapter, client->addr, client->flags, - I2C_SMBUS_READ, command, - I2C_SMBUS_I2C_BLOCK_DATA, &data); - memcpy(values, data.block + 1, length); - return ret; -} - -static void adv7511_edid_rd(struct v4l2_subdev *sd, uint16_t len, uint8_t *buf) +static int adv7511_edid_rd(struct v4l2_subdev *sd, uint16_t len, uint8_t *buf) { struct adv7511_state *state = get_adv7511_state(sd); int i; - int err = 0; v4l2_dbg(1, debug, sd, "%s:\n", __func__); - for (i = 0; !err && i < len; i += I2C_SMBUS_BLOCK_MAX) - err = adv_smbus_read_i2c_block_data(state->i2c_edid, i, + for (i = 0; i < len; i += I2C_SMBUS_BLOCK_MAX) { + s32 ret; + + ret = i2c_smbus_read_i2c_block_data(state->i2c_edid, i, I2C_SMBUS_BLOCK_MAX, buf + i); - if (err) - v4l2_err(sd, "%s: i2c read error\n", __func__); + if (ret < 0) { + v4l2_err(sd, "%s: i2c read error\n", __func__); + return ret; + } + } + + return 0; } static inline int adv7511_cec_read(struct v4l2_subdev *sd, u8 reg) @@ -1668,20 +1657,20 @@ static bool adv7511_check_edid_status(struct v4l2_subdev *sd) if (edidRdy & MASK_ADV7511_EDID_RDY) { int segment = adv7511_rd(sd, 0xc4); struct adv7511_edid_detect ed; + int err; if (segment >= EDID_MAX_SEGM) { v4l2_err(sd, "edid segment number too big\n"); return false; } v4l2_dbg(1, debug, sd, "%s: got segment %d\n", __func__, segment); - adv7511_edid_rd(sd, 256, &state->edid.data[segment * 256]); + err = adv7511_edid_rd(sd, 256, &state->edid.data[segment * 256]); adv7511_dbg_dump_edid(2, debug, sd, segment, &state->edid.data[segment * 256]); if (segment == 0) { state->edid.blocks = state->edid.data[0x7e] + 1; v4l2_dbg(1, debug, sd, "%s: %d blocks in total\n", __func__, state->edid.blocks); } - if (!edid_verify_crc(sd, segment) || - !edid_verify_header(sd, segment)) { + if (err < 0 || !edid_verify_crc(sd, segment) || !edid_verify_header(sd, segment)) { /* edid crc error, force reread of edid segment */ v4l2_err(sd, "%s: edid crc or header error\n", __func__); state->have_monitor = false; From patchwork Tue Jan 19 09:39:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 367392 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 95146C433E9 for ; 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19 Jan 2021 10:39:21 +0100 X-UD-Smtp-Session: l3s3148p1@Gm/3nD258tkgAwDPXyX1ACWcscxtZ2TX From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Wolfram Sang , Corey Minyard , openipmi-developer@lists.sourceforge.net, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] ipmi: remove open coded version of SMBus block write Date: Tue, 19 Jan 2021 10:39:10 +0100 Message-Id: <20210119093912.1838-4-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> References: <20210119093912.1838-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The block-write function of the core was not used because there was no client-struct to use. However, in this case it seems apropriate to use a temporary client struct. Because we are answering a request we recieved when being a client ourselves. So, convert the code to use a temporary client and use the block-write function of the I2C core. Signed-off-by: Wolfram Sang --- Changes since RFC: * don't use stack but kmemdup. No complaints from buildbots drivers/char/ipmi/ipmb_dev_int.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/char/ipmi/ipmb_dev_int.c b/drivers/char/ipmi/ipmb_dev_int.c index 382b28f1cf2f..49b8f22fdcf0 100644 --- a/drivers/char/ipmi/ipmb_dev_int.c +++ b/drivers/char/ipmi/ipmb_dev_int.c @@ -137,7 +137,7 @@ static ssize_t ipmb_write(struct file *file, const char __user *buf, { struct ipmb_dev *ipmb_dev = to_ipmb_dev(file); u8 rq_sa, netf_rq_lun, msg_len; - union i2c_smbus_data data; + struct i2c_client *temp_client; u8 msg[MAX_MSG_LEN]; ssize_t ret; @@ -160,21 +160,21 @@ static ssize_t ipmb_write(struct file *file, const char __user *buf, } /* - * subtract rq_sa and netf_rq_lun from the length of the msg passed to - * i2c_smbus_xfer + * subtract rq_sa and netf_rq_lun from the length of the msg. Fill the + * temporary client. Note that its use is an exception for IPMI. */ msg_len = msg[IPMB_MSG_LEN_IDX] - SMBUS_MSG_HEADER_LENGTH; - if (msg_len > I2C_SMBUS_BLOCK_MAX) - msg_len = I2C_SMBUS_BLOCK_MAX; + temp_client = kmemdup(ipmb_dev->client, sizeof(*temp_client), GFP_KERNEL); + if (!temp_client) + return -ENOMEM; + + temp_client->addr = rq_sa; - data.block[0] = msg_len; - memcpy(&data.block[1], msg + SMBUS_MSG_IDX_OFFSET, msg_len); - ret = i2c_smbus_xfer(ipmb_dev->client->adapter, rq_sa, - ipmb_dev->client->flags, - I2C_SMBUS_WRITE, netf_rq_lun, - I2C_SMBUS_BLOCK_DATA, &data); + ret = i2c_smbus_write_block_data(temp_client, netf_rq_lun, msg_len, + msg + SMBUS_MSG_IDX_OFFSET); + kfree(temp_client); - return ret ? : count; + return ret < 0 ? ret : count; } static __poll_t ipmb_poll(struct file *file, poll_table *wait)