From patchwork Tue Jan 11 11:26:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 12709726 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 A83B5C433F5 for ; Tue, 11 Jan 2022 11:27:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EACB9113616; Tue, 11 Jan 2022 11:27:07 +0000 (UTC) Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by gabe.freedesktop.org (Postfix) with ESMTPS id DD39E113616 for ; Tue, 11 Jan 2022 11:27:06 +0000 (UTC) Received: by mail-pl1-x632.google.com with SMTP id e19so9979710plc.10 for ; Tue, 11 Jan 2022 03:27:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=aUFyLMV0GWlHVuW18MQAch8BvfbkZ5RjN4y5TyCoTS8=; b=AxaAg6kIlLkHQsgU8s3+5BYRqH+T7qGlAtHcFXe/nZyZkWuSeaVPkIwI8bHC+dhMRP 1TmsCCmbgdLsM1HIGsw5+p1nIoKOGkCPC6d1pdWxel81y8Nq9g8Cf3BiaSAy7TAAO3qY hBhizOVeYiVZB07OGNLxxkMaddMOMswIkjjyo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=aUFyLMV0GWlHVuW18MQAch8BvfbkZ5RjN4y5TyCoTS8=; b=kHmGKspG5pmqX9TxnjWt79QdNSBbLEFOGZbz8QQmAoNswjDz9a+UmYqn7XbXDGBkL3 zRFo96T5ZUn23lmCRRN07GnqipEGyPVFEpkx7P/S4YyZX7gNkW0Fj32x9g5Jy1ob72Hn kTCAZxrFC6sPycpud3/tbqlHKtlZf+YiKPoMiQG0vQXNtwKybAEOGHHpssnb4egsLzIP l23SObVaxSYK4lVPdhAgjhfAnQXvUGd2+T4uohk47bwsweiSIx4Tp2mhVzRVGysMSDHj sPpKDY8uU8QA8hJiH0hAuC7rdH4aEcKCzdSS/n0wFtXqjPPXlZUnDVTdwN3Jtz0umR52 epVQ== X-Gm-Message-State: AOAM530nLp5DFp7CsDfWgNe3oeV9Lp+vSfRhMoyyIxV0XsrjFK5AfpjB PBs90ynmydTGyvB77CCdnz2Imw== X-Google-Smtp-Source: ABdhPJwADokKLYG31oJnwFzrI95A99W/MQk1LAj6PUhOiImevr2TrxdzpObC4qORur6heDHtrep/+Q== X-Received: by 2002:aa7:8642:0:b0:4be:9b5a:d4db with SMTP id a2-20020aa78642000000b004be9b5ad4dbmr4045759pfo.64.1641900426453; Tue, 11 Jan 2022 03:27:06 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:a41:eba5:ec46:f86c]) by smtp.gmail.com with ESMTPSA id d12sm10664856pfv.172.2022.01.11.03.27.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jan 2022 03:27:06 -0800 (PST) From: Hsin-Yi Wang To: Robert Foss , Rob Herring , Xin Ji Subject: [PATCH 1/3] drm/bridge: anx7625: Convert to use devm_kzalloc Date: Tue, 11 Jan 2022 19:26:59 +0800 Message-Id: <20220111112701.1064458-1-hsinyi@chromium.org> X-Mailer: git-send-email 2.34.1.575.g55b058a8bb-goog MIME-Version: 1.0 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: devicetree@vger.kernel.org, Jernej Skrabec , Neil Armstrong , David Airlie , Jonas Karlman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Andrzej Hajda , Laurent Pinchart , Sam Ravnborg , Maxime Ripard Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Use devm_kzalloc instead of kzalloc and drop kfree(). Let the memory handled by driver detach. Signed-off-by: Hsin-Yi Wang Reviewed-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 0b858c78abe8b6..dbe708eb3bcf11 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2515,7 +2515,7 @@ static int anx7625_i2c_probe(struct i2c_client *client, return -ENODEV; } - platform = kzalloc(sizeof(*platform), GFP_KERNEL); + platform = devm_kzalloc(dev, sizeof(*platform), GFP_KERNEL); if (!platform) { DRM_DEV_ERROR(dev, "fail to allocate driver data\n"); return -ENOMEM; @@ -2527,7 +2527,7 @@ static int anx7625_i2c_probe(struct i2c_client *client, if (ret) { if (ret != -EPROBE_DEFER) DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret); - goto free_platform; + return ret; } platform->client = client; @@ -2552,7 +2552,7 @@ static int anx7625_i2c_probe(struct i2c_client *client, if (!platform->hdcp_workqueue) { dev_err(dev, "fail to create work queue\n"); ret = -ENOMEM; - goto free_platform; + return ret; } platform->pdata.intp_irq = client->irq; @@ -2637,9 +2637,6 @@ static int anx7625_i2c_probe(struct i2c_client *client, if (platform->hdcp_workqueue) destroy_workqueue(platform->hdcp_workqueue); -free_platform: - kfree(platform); - return ret; } From patchwork Tue Jan 11 11:27:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 12709727 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 0A286C433EF for ; Tue, 11 Jan 2022 11:27:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 43CE811362C; 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Tue, 11 Jan 2022 03:27:08 -0800 (PST) From: Hsin-Yi Wang To: Robert Foss , Rob Herring , Xin Ji Subject: [PATCH 2/3] drm/bridge: anx7625: Support reading edid through aux channel Date: Tue, 11 Jan 2022 19:27:00 +0800 Message-Id: <20220111112701.1064458-2-hsinyi@chromium.org> X-Mailer: git-send-email 2.34.1.575.g55b058a8bb-goog In-Reply-To: <20220111112701.1064458-1-hsinyi@chromium.org> References: <20220111112701.1064458-1-hsinyi@chromium.org> MIME-Version: 1.0 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: devicetree@vger.kernel.org, Jernej Skrabec , Neil Armstrong , David Airlie , Jonas Karlman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Andrzej Hajda , Laurent Pinchart , Sam Ravnborg , Maxime Ripard Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Support reading edid through aux channel if panel is connected to aux bus. Extend anx7625_aux_dpcd_trans() to implement aux transfer function: 1. panel is populated in devm_of_dp_aux_populate_ep_devices(), so move anx7625_parse_dt() after. 2. Use pm runtime autosuspend since aux transfer function is called multiple times when reading edid. 3. No-op if aux transfer length is 0. Signed-off-by: Hsin-Yi Wang Reviewed-by: Xin Ji --- This patch is based on drm-misc-next and depends on https://patchwork.freedesktop.org/patch/469081/ --- drivers/gpu/drm/bridge/analogix/anx7625.c | 123 ++++++++++++++++++---- drivers/gpu/drm/bridge/analogix/anx7625.h | 4 + 2 files changed, 109 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index dbe708eb3bcf11..d60cfc058fbe7d 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -231,19 +232,22 @@ static int wait_aux_op_finish(struct anx7625_data *ctx) return 0; } -static int anx7625_aux_dpcd_trans(struct anx7625_data *ctx, u8 op, - u32 address, u8 len, u8 *buf) +static int anx7625_aux_trans(struct anx7625_data *ctx, u8 op, u32 address, + u8 len, u8 *buf) { struct device *dev = &ctx->client->dev; int ret; u8 addrh, addrm, addrl; u8 cmd; - if (len > MAX_DPCD_BUFFER_SIZE) { + if (len > DP_AUX_MAX_PAYLOAD_BYTES) { dev_err(dev, "exceed aux buffer len.\n"); return -EINVAL; } + if (!len) + return len; + addrl = address & 0xFF; addrm = (address >> 8) & 0xFF; addrh = (address >> 16) & 0xFF; @@ -262,7 +266,7 @@ static int anx7625_aux_dpcd_trans(struct anx7625_data *ctx, u8 op, ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, AP_AUX_ADDR_19_16, addrh); - if (op == DPCD_WRITE) + if (op == DPCD_WRITE || op == AP_AUX_WRITE) ret |= anx7625_reg_block_write(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START, len, buf); /* Enable aux access */ @@ -275,14 +279,14 @@ static int anx7625_aux_dpcd_trans(struct anx7625_data *ctx, u8 op, } ret = wait_aux_op_finish(ctx); - if (ret) { + if (ret < 0) { dev_err(dev, "aux IO error: wait aux op finish.\n"); return ret; } /* Write done */ - if (op == DPCD_WRITE) - return 0; + if (op == DPCD_WRITE || op == AP_AUX_WRITE) + return len; /* Read done, read out dpcd data */ ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client, @@ -292,7 +296,7 @@ static int anx7625_aux_dpcd_trans(struct anx7625_data *ctx, u8 op, return -EIO; } - return 0; + return len; } static int anx7625_video_mute_control(struct anx7625_data *ctx, @@ -867,7 +871,7 @@ static int anx7625_hdcp_enable(struct anx7625_data *ctx) } /* Read downstream capability */ - anx7625_aux_dpcd_trans(ctx, DPCD_READ, 0x68028, 1, &bcap); + anx7625_aux_trans(ctx, DPCD_READ, 0x68028, 1, &bcap); if (!(bcap & 0x01)) { pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap); return 0; @@ -956,7 +960,7 @@ static void anx7625_dp_stop(struct anx7625_data *ctx) dev_dbg(dev, "notify downstream enter into standby\n"); /* Downstream monitor enter into standby mode */ data = 2; - ret |= anx7625_aux_dpcd_trans(ctx, DPCD_WRITE, 0x000600, 1, &data); + ret |= anx7625_aux_trans(ctx, DPCD_WRITE, 0x000600, 1, &data); if (ret < 0) DRM_DEV_ERROR(dev, "IO error : mute video fail\n"); @@ -1655,11 +1659,60 @@ static int anx7625_parse_dt(struct device *dev, return 0; } +static bool anx7625_of_panel_on_aux_bus(struct device *dev) +{ + struct device_node *bus, *panel; + + bus = of_get_child_by_name(dev->of_node, "aux-bus"); + if (!bus) + return false; + + panel = of_get_child_by_name(bus, "panel"); + of_node_put(bus); + if (!panel) + return false; + of_node_put(panel); + + return true; +} + static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge) { return container_of(bridge, struct anx7625_data, bridge); } +static ssize_t anx7625_aux_transfer(struct drm_dp_aux *aux, + struct drm_dp_aux_msg *msg) +{ + struct anx7625_data *ctx = container_of(aux, struct anx7625_data, aux); + struct device *dev = &ctx->client->dev; + u8 request = msg->request & ~DP_AUX_I2C_MOT, op; + int ret = 0; + + pm_runtime_get_sync(dev); + msg->reply = 0; + switch (request) { + case DP_AUX_NATIVE_WRITE: + case DP_AUX_I2C_WRITE: + op = AP_AUX_WRITE; + break; + case DP_AUX_NATIVE_READ: + case DP_AUX_I2C_READ: + op = AP_AUX_READ; + break; + default: + ret = -EINVAL; + } + if (!ret) { + ret = anx7625_aux_trans(ctx, op, msg->address, msg->size, + msg->buffer); + } + pm_runtime_mark_last_busy(dev); + pm_runtime_put_autosuspend(dev); + + return ret; +} + static struct edid *anx7625_get_edid(struct anx7625_data *ctx) { struct device *dev = &ctx->client->dev; @@ -2066,6 +2119,13 @@ static int anx7625_bridge_attach(struct drm_bridge *bridge, return -ENODEV; } + ctx->aux.drm_dev = bridge->dev; + err = drm_dp_aux_register(&ctx->aux); + if (err) { + dev_err(dev, "failed to register aux channel: %d\n", err); + return err; + } + if (ctx->pdata.panel_bridge) { err = drm_bridge_attach(bridge->encoder, ctx->pdata.panel_bridge, @@ -2079,6 +2139,13 @@ static int anx7625_bridge_attach(struct drm_bridge *bridge, return 0; } +static void anx7625_bridge_detach(struct drm_bridge *bridge) +{ + struct anx7625_data *ctx = bridge_to_anx7625(bridge); + + drm_dp_aux_unregister(&ctx->aux); +} + static enum drm_mode_status anx7625_bridge_mode_valid(struct drm_bridge *bridge, const struct drm_display_info *info, @@ -2344,6 +2411,7 @@ static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge, static const struct drm_bridge_funcs anx7625_bridge_funcs = { .attach = anx7625_bridge_attach, + .detach = anx7625_bridge_detach, .mode_valid = anx7625_bridge_mode_valid, .mode_set = anx7625_bridge_mode_set, .atomic_check = anx7625_bridge_atomic_check, @@ -2501,6 +2569,12 @@ static const struct dev_pm_ops anx7625_pm_ops = { anx7625_runtime_pm_resume, NULL) }; +static void anx7625_runtime_disable(void *data) +{ + pm_runtime_dont_use_autosuspend(data); + pm_runtime_disable(data); +} + static int anx7625_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -2523,13 +2597,6 @@ static int anx7625_i2c_probe(struct i2c_client *client, pdata = &platform->pdata; - ret = anx7625_parse_dt(dev, pdata); - if (ret) { - if (ret != -EPROBE_DEFER) - DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret); - return ret; - } - platform->client = client; i2c_set_clientdata(client, platform); @@ -2577,6 +2644,19 @@ static int anx7625_i2c_probe(struct i2c_client *client, } } + platform->aux.name = "anx7625-aux"; + platform->aux.dev = dev; + platform->aux.transfer = anx7625_aux_transfer; + drm_dp_aux_init(&platform->aux); + devm_of_dp_aux_populate_ep_devices(&platform->aux); + + ret = anx7625_parse_dt(dev, pdata); + if (ret) { + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret); + return ret; + } + if (anx7625_register_i2c_dummy_clients(platform, client) != 0) { ret = -ENOMEM; DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n"); @@ -2584,6 +2664,12 @@ static int anx7625_i2c_probe(struct i2c_client *client, } pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, 1000); + pm_runtime_use_autosuspend(dev); + pm_suspend_ignore_children(dev, true); + ret = devm_add_action_or_reset(dev, anx7625_runtime_disable, dev); + if (ret) + return ret; if (!platform->pdata.low_power_mode) { anx7625_disable_pd_protocol(platform); @@ -2596,7 +2682,8 @@ static int anx7625_i2c_probe(struct i2c_client *client, platform->bridge.funcs = &anx7625_bridge_funcs; platform->bridge.of_node = client->dev.of_node; - platform->bridge.ops = DRM_BRIDGE_OP_EDID; + if (!anx7625_of_panel_on_aux_bus(&client->dev)) + platform->bridge.ops |= DRM_BRIDGE_OP_EDID; if (!platform->pdata.panel_bridge) platform->bridge.ops |= DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_DETECT; diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h index 56165f5b254c14..cab19735c22e21 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.h +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h @@ -231,6 +231,9 @@ #define AP_AUX_ADDR_15_8 0x12 #define AP_AUX_ADDR_19_16 0x13 +#define AP_AUX_READ 0x1 +#define AP_AUX_WRITE 0x4 + /* Bit[0:3] AUX status, bit 4 op_en, bit 5 address only */ #define AP_AUX_CTRL_STATUS 0x14 #define AP_AUX_CTRL_OP_EN 0x10 @@ -474,6 +477,7 @@ struct anx7625_data { u8 bridge_attached; struct drm_connector *connector; struct mipi_dsi_device *dsi; + struct drm_dp_aux aux; }; #endif /* __ANX7625_H__ */ From patchwork Tue Jan 11 11:27:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hsin-Yi Wang X-Patchwork-Id: 12709728 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 F22E2C433F5 for ; Tue, 11 Jan 2022 11:27:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0308B113605; Tue, 11 Jan 2022 11:27:14 +0000 (UTC) Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9204B113605 for ; 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Tue, 11 Jan 2022 03:27:12 -0800 (PST) Received: from hsinyi-z840.tpe.corp.google.com ([2401:fa00:1:10:a41:eba5:ec46:f86c]) by smtp.gmail.com with ESMTPSA id d12sm10664856pfv.172.2022.01.11.03.27.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jan 2022 03:27:11 -0800 (PST) From: Hsin-Yi Wang To: Robert Foss , Rob Herring , Xin Ji Subject: [PATCH 3/3] dt-bindings: drm/bridge: anx7625: Add aux-bus node Date: Tue, 11 Jan 2022 19:27:01 +0800 Message-Id: <20220111112701.1064458-3-hsinyi@chromium.org> X-Mailer: git-send-email 2.34.1.575.g55b058a8bb-goog In-Reply-To: <20220111112701.1064458-1-hsinyi@chromium.org> References: <20220111112701.1064458-1-hsinyi@chromium.org> MIME-Version: 1.0 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: devicetree@vger.kernel.org, Jernej Skrabec , Neil Armstrong , David Airlie , Jonas Karlman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Andrzej Hajda , Laurent Pinchart , Sam Ravnborg , Maxime Ripard Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" List panel under aux-bus node if it's connected to anx7625's aux bus. Signed-off-by: Hsin-Yi Wang Reviewed-by: Xin Ji --- .../display/bridge/analogix,anx7625.yaml | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml index 1d3e88daca041a..0d38d6fe39830f 100644 --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml @@ -83,6 +83,9 @@ properties: type: boolean description: let the driver enable audio HDMI codec function or not. + aux-bus: + $ref: /schemas/display/dp-aux-bus.yaml# + ports: $ref: /schemas/graph.yaml#/properties/ports @@ -167,5 +170,19 @@ examples: }; }; }; + + aux-bus { + panel { + compatible = "innolux,n125hce-gn1"; + power-supply = <&pp3300_disp_x>; + backlight = <&backlight_lcd0>; + + port { + panel_in: endpoint { + remote-endpoint = <&anx7625_out>; + }; + }; + }; + }; }; };