From patchwork Tue Nov 24 12:44:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 11928415 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 95FB2C8300C for ; Tue, 24 Nov 2020 12:46:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 433CE2083E for ; Tue, 24 Nov 2020 12:46:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="evWBxcdn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387644AbgKXMqZ (ORCPT ); Tue, 24 Nov 2020 07:46:25 -0500 Received: from fllv0015.ext.ti.com ([198.47.19.141]:54976 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732512AbgKXMqY (ORCPT ); Tue, 24 Nov 2020 07:46:24 -0500 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0AOCkG9t122835; Tue, 24 Nov 2020 06:46:16 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1606221976; bh=XWEQPGmtNHqM2b2OEm0LZLT4+slR+bJ8g1XkIqlxbmw=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=evWBxcdn5KGIl1ZZk5S6BdwzSFMfirfLf/Zt6YBg7ogpclSkmbC/oTjupMQOzEXLP 4TxNPsBjKm9g76QbKVS6Y2Yg456G8NwcKhPdd6389q7gvFy9mUcCedGQDR5GAm4CkI vatqvGxiS+QmOH7eB3oSsMHufviL3QDFNxqbMqSw= Received: from DFLE103.ent.ti.com (dfle103.ent.ti.com [10.64.6.24]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 0AOCkGnq042754 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 24 Nov 2020 06:46:16 -0600 Received: from DFLE100.ent.ti.com (10.64.6.21) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Tue, 24 Nov 2020 06:46:15 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Tue, 24 Nov 2020 06:46:15 -0600 Received: from deskari.lan (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0AOCjmox040922; Tue, 24 Nov 2020 06:46:13 -0600 From: Tomi Valkeinen To: Sebastian Reichel , Laurent Pinchart , Nikhil Devshatwar , , CC: Sekhar Nori , Tony Lindgren , , Sebastian Reichel , Tomi Valkeinen Subject: [PATCH v4 10/80] drm/omap: dsi: simplify read functions Date: Tue, 24 Nov 2020 14:44:28 +0200 Message-ID: <20201124124538.660710-11-tomi.valkeinen@ti.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201124124538.660710-1-tomi.valkeinen@ti.com> References: <20201124124538.660710-1-tomi.valkeinen@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: Sebastian Reichel Simplify the read related message handling by using the functionality provided by CONFIG_DRM_MIPI_DSI. Signed-off-by: Sebastian Reichel Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- drivers/gpu/drm/omapdrm/dss/dsi.c | 110 +++++++++--------------------- 1 file changed, 34 insertions(+), 76 deletions(-) diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index e1595c0608f2..bbdc52ee3559 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -2742,60 +2742,6 @@ static int dsi_vc_write_common(struct omap_dss_device *dssdev, return 0; } -static int dsi_vc_dcs_send_read_request(struct dsi_data *dsi, int channel, - u8 dcs_cmd) -{ - int r; - - if (dsi->debug_read) - DSSDBG("dsi_vc_dcs_send_read_request(ch%d, dcs_cmd %x)\n", - channel, dcs_cmd); - - r = dsi_vc_send_short(dsi, channel, MIPI_DSI_DCS_READ, dcs_cmd, 0); - if (r) { - DSSERR("dsi_vc_dcs_send_read_request(ch %d, cmd 0x%02x)" - " failed\n", channel, dcs_cmd); - return r; - } - - return 0; -} - -static int dsi_vc_generic_send_read_request(struct dsi_data *dsi, int channel, - const u8 *reqdata, int reqlen) -{ - u16 data; - u8 data_type; - int r; - - if (dsi->debug_read) - DSSDBG("dsi_vc_generic_send_read_request(ch %d, reqlen %d)\n", - channel, reqlen); - - if (reqlen == 0) { - data_type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM; - data = 0; - } else if (reqlen == 1) { - data_type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM; - data = reqdata[0]; - } else if (reqlen == 2) { - data_type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM; - data = reqdata[0] | (reqdata[1] << 8); - } else { - BUG(); - return -EINVAL; - } - - r = dsi_vc_send_short(dsi, channel, data_type, data, 0); - if (r) { - DSSERR("dsi_vc_generic_send_read_request(ch %d, reqlen %d)" - " failed\n", channel, reqlen); - return r; - } - - return 0; -} - static int dsi_vc_read_rx_fifo(struct dsi_data *dsi, int channel, u8 *buf, int buflen, enum dss_dsi_content_type type) { @@ -2904,13 +2850,18 @@ static int dsi_vc_read_rx_fifo(struct dsi_data *dsi, int channel, u8 *buf, return r; } -static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_cmd, - u8 *buf, int buflen) +static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, + const struct mipi_dsi_msg *msg) { struct dsi_data *dsi = to_dsi_data(dssdev); + u8 dcs_cmd = ((u8 *)msg->tx_buf)[0]; + u8 channel = msg->channel; int r; - r = dsi_vc_dcs_send_read_request(dsi, channel, dcs_cmd); + if (dsi->debug_read) + DSSDBG("%s(ch %d, cmd %x)\n", __func__, channel, dcs_cmd); + + r = dsi_vc_send_short(dsi, channel, MIPI_DSI_DCS_READ, dcs_cmd, 0); if (r) goto err; @@ -2918,47 +2869,58 @@ static int dsi_vc_dcs_read(struct omap_dss_device *dssdev, int channel, u8 dcs_c if (r) goto err; - r = dsi_vc_read_rx_fifo(dsi, channel, buf, buflen, + r = dsi_vc_read_rx_fifo(dsi, channel, msg->rx_buf, msg->rx_len, DSS_DSI_CONTENT_DCS); if (r < 0) goto err; - if (r != buflen) { + if (r != msg->rx_len) { r = -EIO; goto err; } return 0; err: - DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n", channel, dcs_cmd); + DSSERR("%s(ch %d, cmd 0x%02x) failed\n", __func__, msg->channel, dcs_cmd); return r; } -static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int channel, - const u8 *reqdata, int reqlen, u8 *buf, int buflen) +static int dsi_vc_generic_read(struct omap_dss_device *dssdev, + const struct mipi_dsi_msg *msg) { struct dsi_data *dsi = to_dsi_data(dssdev); + struct mipi_dsi_packet packet; + u16 data; int r; - r = dsi_vc_generic_send_read_request(dsi, channel, reqdata, reqlen); + r = mipi_dsi_create_packet(&packet, msg); + if (r < 0) + goto err; + + data = packet.header[1] | (packet.header[2] << 8); + + r = dsi_vc_send_short(dsi, msg->channel, msg->type, data, 0); if (r) - return r; + goto err; - r = dsi_vc_send_bta_sync(dssdev, channel); + r = dsi_vc_send_bta_sync(dssdev, msg->channel); if (r) - return r; + goto err; - r = dsi_vc_read_rx_fifo(dsi, channel, buf, buflen, + r = dsi_vc_read_rx_fifo(dsi, msg->channel, msg->rx_buf, msg->rx_len, DSS_DSI_CONTENT_GENERIC); if (r < 0) - return r; + goto err; - if (r != buflen) { + if (r != msg->rx_len) { r = -EIO; - return r; + goto err; } return 0; +err: + DSSERR("%s(ch %d, reqlen %d) failed\n", __func__, msg->channel, msg->tx_len); + return r; } static int dsi_enter_ulps(struct dsi_data *dsi) @@ -4775,13 +4737,9 @@ static ssize_t omap_dsi_transfer(struct omap_dss_device *dssdev, case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: - return dsi_vc_generic_read(dssdev, msg->channel, - msg->tx_buf, msg->tx_len, - msg->rx_buf, msg->rx_len); + return dsi_vc_generic_read(dssdev, msg); case MIPI_DSI_DCS_READ: - return dsi_vc_dcs_read(dssdev, msg->channel, - ((u8 *)msg->tx_buf)[0], - msg->rx_buf, msg->rx_len); + return dsi_vc_dcs_read(dssdev, msg); } return -EINVAL;