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Mon, 20 Nov 2023 09:11:22 +0000 From: Xin Ji To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter Subject: [PATCH 1/2] Revert "drm/bridge: Add 200ms delay to wait FW HPD status stable" Date: Mon, 20 Nov 2023 17:10:36 +0800 Message-Id: <20231120091038.284825-1-xji@analogixsemi.com> X-Mailer: git-send-email 2.25.1 X-ClientProxiedBy: SGXP274CA0013.SGPP274.PROD.OUTLOOK.COM (2603:1096:4:b8::25) To BY5PR04MB6739.namprd04.prod.outlook.com (2603:10b6:a03:229::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY5PR04MB6739:EE_|BY5PR04MB6706:EE_ X-MS-Office365-Filtering-Correlation-Id: 241fe919-60e0-44ef-7aaa-08dbe9a8aa10 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: IpDXyibu/TdPuPiCNF5haChhM6kei60FGwyELaRPgGXFKLu0W4cpcyX0PFDHp4Q1N5sofXL8u3PGVoRvwsh7HK1RfBdAw+wAS6NT7tXCfRvoFPwzHoTc2BgzMJ5i4/PcOZgHfrtI7IfCsP/Pc54+8tX1PEFApSfqd7g7DCIGd6+o0ytEcqB41tXIHDkxwrQ6m2zmDaHijGLOoelVg1aIP4vwG+eEON8xKHgZUAy11y/5rctk73VLGhc6NPUb84LxsoPe1Bl+QQKodKT5m/wvqcm4nhNtccERiSqovkd4jWqWTif6llEkgGGRN7y+RcKdohDIv+mjZCLsjFCboXkNjEFKIDWzD5FoDRrYAv0uinwyw6y8Wa65N50vIqauyGj6+QENxDiz5cIIi27z9ZMuosl1+BnyMOAE2Er0mQS1l4fToS7iixVM4DR4JzA/83w227ffsnnreDMlqTmmUGud4p1z/opDAg3U9lVct6EGEAS0kblqcQvrP9213PYRVPrd9wrb8ZusEQ8Og4gLJBFgm3iVoDz0W9a2O5A0909XokpXQfwUfnjSDY3SoeSYVQ1AYRWM5S5555kKfXFw/FjPUpAvYdBgdTVV2HTk9V/hfS79PGYRSqs2wJVJ2QgYKIcl+dBsZyuFKVCHaL7Gl552wg== X-Forefront-Antispam-Report: CIP:255.255.255.255; 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Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 8f740154707d..51abe42c639e 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1464,9 +1464,6 @@ static int _anx7625_hpd_polling(struct anx7625_data *ctx, if (ctx->pdata.intp_irq) return 0; - /* Delay 200ms for FW HPD de-bounce */ - msleep(200); - ret = readx_poll_timeout(anx7625_read_hpd_status_p0, ctx, val, ((val & HPD_STATUS) || (val < 0)), From patchwork Mon Nov 20 09:10:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xin Ji X-Patchwork-Id: 13460970 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 2FF47C54E76 for ; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: analogixsemi.com X-MS-Exchange-CrossTenant-Network-Message-Id: 30934ae5-1d54-4b86-ab8c-08dbe9a8b156 X-MS-Exchange-CrossTenant-AuthSource: BY5PR04MB6739.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Nov 2023 09:11:34.3899 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b099b0b4-f26c-4cf5-9a0f-d5be9acab205 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +h0Eu7ERrlsoytwHHvmeq6Bllqsxex5dLp51/7xJUG4t8FykQ9o2o1oBJPj0w8R131w8uEgY5TmeNqG7klRz+Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR04MB6706 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: qwen@analogixsemi.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, hsinyi@chromium.org, bliang@analogixsemi.com, Xin Ji Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Polling firmware HPD GPIO status, set HPD irq detect window to 2ms after firmware HPD GPIO initial done Signed-off-by: Xin Ji --- drivers/gpu/drm/bridge/analogix/anx7625.c | 51 ++++++++++++++++------- drivers/gpu/drm/bridge/analogix/anx7625.h | 4 ++ 2 files changed, 40 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 51abe42c639e..ef31033439bc 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -1298,10 +1298,32 @@ static void anx7625_config(struct anx7625_data *ctx) XTAL_FRQ_SEL, XTAL_FRQ_27M); } +static int anx7625_hpd_timer_config(struct anx7625_data *ctx) +{ + int ret; + + /* Set irq detect window to 2ms */ + ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, + HPD_DET_TIMER_BIT0_7, HPD_TIME & 0xFF); + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, + HPD_DET_TIMER_BIT8_15, + (HPD_TIME >> 8) & 0xFF); + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, + HPD_DET_TIMER_BIT16_23, + (HPD_TIME >> 16) & 0xFF); + + return ret; +} + +static int anx7625_read_hpd_gpio_config_status(struct anx7625_data *ctx) +{ + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, GPIO_CTRL_2); +} + static void anx7625_disable_pd_protocol(struct anx7625_data *ctx) { struct device *dev = ctx->dev; - int ret; + int ret, val; /* Reset main ocm */ ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40); @@ -1315,6 +1337,19 @@ static void anx7625_disable_pd_protocol(struct anx7625_data *ctx) DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n"); else DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n"); + + /* + * Make sure the HPD GPIO already be configured after OCM release before + * setting HPD detect window register. Here we poll the status register + * at maximum 40ms, then config HPD irq detect window register + */ + readx_poll_timeout(anx7625_read_hpd_gpio_config_status, + ctx, val, + ((val & HPD_SOURCE) || (val < 0)), + 2000, 2000 * 20); + + /* Set HPD irq detect window to 2ms */ + anx7625_hpd_timer_config(ctx); } static int anx7625_ocm_loading_check(struct anx7625_data *ctx) @@ -1437,20 +1472,6 @@ static void anx7625_start_dp_work(struct anx7625_data *ctx) static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx) { - int ret; - - /* Set irq detect window to 2ms */ - ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, - HPD_DET_TIMER_BIT0_7, HPD_TIME & 0xFF); - ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, - HPD_DET_TIMER_BIT8_15, - (HPD_TIME >> 8) & 0xFF); - ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client, - HPD_DET_TIMER_BIT16_23, - (HPD_TIME >> 16) & 0xFF); - if (ret < 0) - return ret; - return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS); } diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h index 5af819611ebc..66ebee7f3d83 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.h +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h @@ -259,6 +259,10 @@ #define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in 0: no RX in */ #define AP_DISABLE_PD BIT(6) #define AP_DISABLE_DISPLAY BIT(7) + +#define GPIO_CTRL_2 0x49 +#define HPD_SOURCE BIT(6) + /***************************************************************/ /* Register definition of device address 0x84 */ #define MIPI_PHY_CONTROL_3 0x03