From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60C7260DF0; Mon, 22 Jan 2024 15:04:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705935898; cv=none; b=RbKqzeHhYVMN5TftPYBVcpr6hRgmcseXroAVCmALFl42AAlBteaT13Jy8BsvBwhnrpIFsDJWGVXkrlw8gl3hLbF2NeYj/ln41A2/IpTQsHgZemva6tSkqV1WaBW69dBuoOA8x7VEmZv1rXWa4lY+O7cN2ge1LB4uMXFhzamNHYo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705935898; c=relaxed/simple; bh=NJfonpRkZQiY4b3wY4dGHHawtZbj1o6FiAjnHRw3bj8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KuD1Cf5MJUlK35PR1mSKefG50d4py9vaIBDHdry0OpPvjzsL/c7DBHJU7O5LwsECYCPub/KFhCp0Ae9gltqQTQoBC5Jp9PtctPUwjcUqCzd61oOk95vK0MynuVk3QMu83kbt36W7EXkxlz5db7rpR1ztyjIJ4HxX3e7lTX3i2Gw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nawjDs8e; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nawjDs8e" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C91B5C43142; Mon, 22 Jan 2024 15:04:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705935898; bh=NJfonpRkZQiY4b3wY4dGHHawtZbj1o6FiAjnHRw3bj8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nawjDs8eMk+e1tzNLlW3Inj5dtzSKfymcFpFh6wjZsY4ieayspKLXble241Nb1U56 yfBioWlTuqRd/4OVVn5eDJwhS703VpUzfJuVFONhkWn/FtItb6uywoZAZKNTHl0c5g SGMhvDZsD5cbWUQAVLaTrKRymj7NAYDPvhoF7E8i+4A+HcpUASGoJNH4RwadFOJ+A0 iRh50+KDJf1bS2VUcYFaA4ulaFMxOeBa6rIMi1xFbZlSd4VC/Ep8FAIUNh51EXOv/U HguLHcQYSJ1P3QjE8a91s60ACBemX8MKARn2yrmOkHh87TDYuJ5je1UQePoRs/ALnt 3tzbGYvJtHwhw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Xin Ji , Robert Foss , Sasha Levin , andrzej.hajda@intel.com, neil.armstrong@linaro.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, daniel@ffwll.ch, wenst@chromium.org, nfraprado@collabora.com, dianders@chromium.org, u.kleine-koenig@pengutronix.de, treapking@chromium.org, angelogioacchino.delregno@collabora.com, andriy.shevchenko@linux.intel.com, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.6 10/73] drm/bridge: anx7625: Fix Set HPD irq detect window to 2ms Date: Mon, 22 Jan 2024 10:01:24 -0500 Message-ID: <20240122150432.992458-10-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122150432.992458-1-sashal@kernel.org> References: <20240122150432.992458-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.13 Content-Transfer-Encoding: 8bit From: Xin Ji [ Upstream commit e3af7053de3f685c96158373bc234b2feca1f160 ] Polling firmware HPD GPIO status, set HPD irq detect window to 2ms after firmware HPD GPIO initial done Signed-off-by: Xin Ji Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20231120091038.284825-2-xji@analogixsemi.com Signed-off-by: Sasha Levin --- 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 -- 2.43.0