From patchwork Fri Mar 11 21:02:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 12778564 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6F18EC433FE for ; Fri, 11 Mar 2022 21:03:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9AA2B10E9D2; Fri, 11 Mar 2022 21:03:27 +0000 (UTC) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) by gabe.freedesktop.org (Postfix) with ESMTPS id 728A610E66C for ; Fri, 11 Mar 2022 21:03:09 +0000 (UTC) Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 3C832838D5; Fri, 11 Mar 2022 22:03:07 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1647032588; bh=b/NTiCCv1rL/cJXi4YTCbk1Y3vKJOYX44PQa6mv7dSI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ae5qH0acPSHTMCmEOK9WQLcb8JcMIgRcVM6aYp6eMNszchmM2aKlMhxOeeHgHSwFS KtVPp89bqJxnMapFhPrT7ZKgObbODpkzRnB2RX9NdM/RSEgapZsgwkZtv96F1gveRq Q4Upw4qC5eX4m6vmBm61dYc1jUtI6dVmd+rbkTBIgWhE5+ZDbGyDLyJeQvGpT1dbEq fvolRpDUNGZWRBWAUffPck8zN8jkY2LwBBvrzFQI7GpZfiK3Z7dwU9ny5mweAYoaul eEMl7pOJh8tCoT6c1JJ2WytVNFvPH5O0sT7PWbPsGXejc0ssSodj/pLIpP0ZCEOoAO 2HJHy/xpgGKcw== From: Marek Vasut To: dri-devel@lists.freedesktop.org Subject: [PATCH v4 11/13] drm: bridge: icn6211: Add I2C configuration support Date: Fri, 11 Mar 2022 22:02:25 +0100 Message-Id: <20220311210227.124331-12-marex@denx.de> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220311210227.124331-1-marex@denx.de> References: <20220311210227.124331-1-marex@denx.de> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.5 at phobos.denx.de X-Virus-Status: Clean X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marek Vasut , Robert Foss , Jagan Teki , Thomas Zimmermann , Sam Ravnborg , Maxime Ripard Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The ICN6211 chip starts in I2C configuration mode after cold boot. Implement support for configuring the chip via I2C in addition to the current DSI LP command mode configuration support. The later seems to be available only on chips which have additional MCU on the panel/bridge board which preconfigures the ICN6211, while the I2C configuration mode added by this patch does not require any such MCU. Signed-off-by: Marek Vasut Cc: Jagan Teki Cc: Maxime Ripard Cc: Robert Foss Cc: Sam Ravnborg Cc: Thomas Zimmermann To: dri-devel@lists.freedesktop.org --- V2: - Drop the abridge variable - Rename chipone_dsi_setup to chipone_dsi_host_attach and call it from chipone_i2c_probe() V3: Add AB from Maxime V4: - Update on top of small change in drm: bridge: icn6211: Add generic DSI-to-DPI PLL configuration - Look up host_node locally in chipone_dsi_host_attach() - Drop AB from Maxime --- drivers/gpu/drm/bridge/chipone-icn6211.c | 174 ++++++++++++++++++++--- 1 file changed, 153 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c index 144bed4c83083..44fdb9c9bd448 100644 --- a/drivers/gpu/drm/bridge/chipone-icn6211.c +++ b/drivers/gpu/drm/bridge/chipone-icn6211.c @@ -11,6 +11,7 @@ #include #include +#include #include #include #include @@ -133,6 +134,7 @@ struct chipone { struct device *dev; + struct i2c_client *client; struct drm_bridge bridge; struct drm_display_mode mode; struct drm_bridge *panel_bridge; @@ -142,6 +144,7 @@ struct chipone { struct regulator *vdd2; struct regulator *vdd3; int dsi_lanes; + bool interface_i2c; }; static inline struct chipone *bridge_to_chipone(struct drm_bridge *bridge) @@ -152,9 +155,10 @@ static inline struct chipone *bridge_to_chipone(struct drm_bridge *bridge) static inline int chipone_dsi_write(struct chipone *icn, const void *seq, size_t len) { - struct mipi_dsi_device *dsi = to_mipi_dsi_device(icn->dev); - - return mipi_dsi_generic_write(dsi, seq, len); + if (icn->interface_i2c) + i2c_smbus_write_byte_data(icn->client, reg, val); + else + mipi_dsi_generic_write(icn->dsi, (u8[]){reg, val}, 2); } #define ICN6211_DSI(icn, seq...) \ @@ -259,7 +263,10 @@ static void chipone_atomic_enable(struct drm_bridge *bridge, bridge_state = drm_atomic_get_new_bridge_state(state, bridge); bus_flags = bridge_state->output_bus_cfg.flags; - ICN6211_DSI(icn, MIPI_CFG_PW, MIPI_CFG_PW_CONFIG_DSI); + if (icn->interface_i2c) + ICN6211_DSI(icn, MIPI_CFG_PW, MIPI_CFG_PW_CONFIG_I2C); + else + ICN6211_DSI(icn, MIPI_CFG_PW, MIPI_CFG_PW_CONFIG_DSI); ICN6211_DSI(icn, HACTIVE_LI, mode->hdisplay & 0xff); @@ -380,6 +387,67 @@ static void chipone_mode_set(struct drm_bridge *bridge, struct chipone *icn = bridge_to_chipone(bridge); drm_mode_copy(&icn->mode, adjusted_mode); +}; + +static int chipone_dsi_attach(struct chipone *icn) +{ + struct mipi_dsi_device *dsi = icn->dsi; + int ret; + + dsi->lanes = icn->dsi_lanes; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; + + ret = mipi_dsi_attach(dsi); + if (ret < 0) + dev_err(icn->dev, "failed to attach dsi\n"); + + return ret; +} + +static int chipone_dsi_host_attach(struct chipone *icn) +{ + struct device *dev = icn->dev; + struct device_node *host_node; + struct device_node *endpoint; + struct mipi_dsi_device *dsi; + struct mipi_dsi_host *host; + int ret = 0; + + const struct mipi_dsi_device_info info = { + .type = "chipone", + .channel = 0, + .node = NULL, + }; + + endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0); + host_node = of_graph_get_remote_port_parent(endpoint); + of_node_put(endpoint); + + if (!host_node) + return -EINVAL; + + host = of_find_mipi_dsi_host_by_node(host_node); + of_node_put(host_node); + if (!host) { + dev_err(dev, "failed to find dsi host\n"); + return -EPROBE_DEFER; + } + + dsi = mipi_dsi_device_register_full(host, &info); + if (IS_ERR(dsi)) { + return dev_err_probe(dev, PTR_ERR(dsi), + "failed to create dsi device\n"); + } + + icn->dsi = dsi; + + ret = chipone_dsi_attach(icn); + if (ret < 0) + mipi_dsi_device_unregister(dsi); + + return ret; } static int chipone_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) @@ -487,9 +555,8 @@ static int chipone_parse_dt(struct chipone *icn) return 0; } -static int chipone_probe(struct mipi_dsi_device *dsi) +static int chipone_common_probe(struct device *dev, struct chipone **icnr) { - struct device *dev = &dsi->dev; struct chipone *icn; int ret; @@ -497,7 +564,6 @@ static int chipone_probe(struct mipi_dsi_device *dsi) if (!icn) return -ENOMEM; - mipi_dsi_set_drvdata(dsi, icn); icn->dev = dev; ret = chipone_parse_dt(icn); @@ -507,25 +573,58 @@ static int chipone_probe(struct mipi_dsi_device *dsi) icn->bridge.funcs = &chipone_bridge_funcs; icn->bridge.type = DRM_MODE_CONNECTOR_DPI; icn->bridge.of_node = dev->of_node; + + *icnr = icn; + + return ret; +} + +static int chipone_dsi_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct chipone *icn; + int ret; + + ret = chipone_common_probe(dev, &icn); + if (ret) + return ret; + + icn->interface_i2c = false; icn->dsi = dsi; - drm_bridge_add(&icn->bridge); + mipi_dsi_set_drvdata(dsi, icn); - dsi->lanes = icn->dsi_lanes; - dsi->format = MIPI_DSI_FMT_RGB888; - dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | - MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET; + drm_bridge_add(&icn->bridge); - ret = mipi_dsi_attach(dsi); - if (ret < 0) { + ret = chipone_dsi_attach(icn); + if (ret) drm_bridge_remove(&icn->bridge); - dev_err(dev, "failed to attach dsi\n"); - } return ret; } -static int chipone_remove(struct mipi_dsi_device *dsi) +static int chipone_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct chipone *icn; + int ret; + + ret = chipone_common_probe(dev, &icn); + if (ret) + return ret; + + icn->interface_i2c = true; + icn->client = client; + dev_set_drvdata(dev, icn); + i2c_set_clientdata(client, icn); + + drm_bridge_add(&icn->bridge); + + return chipone_dsi_host_attach(icn); +} + +static int chipone_dsi_remove(struct mipi_dsi_device *dsi) { struct chipone *icn = mipi_dsi_get_drvdata(dsi); @@ -541,16 +640,49 @@ static const struct of_device_id chipone_of_match[] = { }; MODULE_DEVICE_TABLE(of, chipone_of_match); -static struct mipi_dsi_driver chipone_driver = { - .probe = chipone_probe, - .remove = chipone_remove, +static struct mipi_dsi_driver chipone_dsi_driver = { + .probe = chipone_dsi_probe, + .remove = chipone_dsi_remove, .driver = { .name = "chipone-icn6211", .owner = THIS_MODULE, .of_match_table = chipone_of_match, }, }; -module_mipi_dsi_driver(chipone_driver); + +static struct i2c_device_id chipone_i2c_id[] = { + { "chipone,icn6211" }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, chipone_i2c_id); + +static struct i2c_driver chipone_i2c_driver = { + .probe = chipone_i2c_probe, + .id_table = chipone_i2c_id, + .driver = { + .name = "chipone-icn6211-i2c", + .owner = THIS_MODULE, + .of_match_table = chipone_of_match, + }, +}; + +static int __init chipone_init(void) +{ + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) + mipi_dsi_driver_register(&chipone_dsi_driver); + + return i2c_add_driver(&chipone_i2c_driver); +} +module_init(chipone_init); + +static void __init chipone_exit(void) +{ + i2c_del_driver(&chipone_i2c_driver); + + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) + mipi_dsi_driver_unregister(&chipone_dsi_driver); +} +module_exit(chipone_exit); MODULE_AUTHOR("Jagan Teki "); MODULE_DESCRIPTION("Chipone ICN6211 MIPI-DSI to RGB Converter Bridge");