From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS 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 AC758C433E0 for ; Thu, 28 May 2020 01:52:23 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 78031207CB for ; Thu, 28 May 2020 01:52:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="VuAVRJAm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 78031207CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ideasonboard.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 907636E13D; Thu, 28 May 2020 01:52:22 +0000 (UTC) Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by gabe.freedesktop.org (Postfix) with ESMTPS id 995546E13D for ; Thu, 28 May 2020 01:52:21 +0000 (UTC) Received: from pendragon.ideasonboard.com (81-175-216-236.bb.dnainternet.fi [81.175.216.236]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 9DF0F2A3; Thu, 28 May 2020 03:52:19 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1590630739; bh=/jzLxjGg2ah+SqYHT7r/r/s1jJQD1E9/tKRNV5hxywM=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=VuAVRJAmRdErO7QmzXpyFDGifoTSblnARkXSW6eGvAo7+mu734gfSDubkOUDv9/jC knCarFWnKvb0PYMSJgXhYWs1SbIJq9rYl0gOY9jEJR4jxJVAoE2qa+AsszzeZS2mBR i+YPFIXyTQrpYYCElMUUl/Drx4aZdBxnGGLcF2cw= Date: Thu, 28 May 2020 04:52:05 +0300 From: Laurent Pinchart To: Vinod Koul Subject: Re: [PATCH 3/3] drm/bridge: Introduce LT9611 DSI to HDMI bridge Message-ID: <20200528015205.GE4670@pendragon.ideasonboard.com> References: <20200513100533.42996-1-vkoul@kernel.org> <20200513100533.42996-4-vkoul@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200513100533.42996-4-vkoul@kernel.org> 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 , linux-arm-msm@vger.kernel.org, Jonas Karlman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Bjorn Andersson , Andrzej Hajda , Rob Herring Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Vinod, Thank you for the patch. On Wed, May 13, 2020 at 03:35:33PM +0530, Vinod Koul wrote: > Lontium Lt9611 is a DSI to HDMI bridge which supports two DSI ports and > I2S port as an input and HDMI port as output > > Co-developed-by: Bjorn Andersson > Signed-off-by: Bjorn Andersson > Signed-off-by: Vinod Koul > --- > drivers/gpu/drm/bridge/Kconfig | 13 + > drivers/gpu/drm/bridge/Makefile | 1 + > drivers/gpu/drm/bridge/lt9611.c | 1113 +++++++++++++++++++++++++++++++ > 3 files changed, 1127 insertions(+) > create mode 100644 drivers/gpu/drm/bridge/lt9611.c > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > index aaed2347ace9..5cac15ce2027 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -38,6 +38,19 @@ config DRM_DISPLAY_CONNECTOR > on ARM-based platforms. Saying Y here when this driver is not needed > will not cause any issue. > > +config DRM_LONTIUM_LT9611 > + tristate "Lontium LT9611 DSI/HDMI bridge" > + select SND_SOC_HDMI_CODEC if SND_SOC > + depends on OF > + select DRM_PANEL_BRIDGE > + select DRM_KMS_HELPER > + select REGMAP_I2C > + help > + Driver for Lontium LT9611 DSI to HDMI bridge > + chip driver that converts dual DSI and I2S to > + HDMI signals > + Please say Y if you have such hardware. > + > config DRM_LVDS_CODEC > tristate "Transparent LVDS encoders and decoders support" > depends on OF > diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile > index 6fb062b5b0f0..d2a696e8ca5d 100644 > --- a/drivers/gpu/drm/bridge/Makefile > +++ b/drivers/gpu/drm/bridge/Makefile > @@ -1,6 +1,7 @@ > # SPDX-License-Identifier: GPL-2.0 > obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o > obj-$(CONFIG_DRM_DISPLAY_CONNECTOR) += display-connector.o > +obj-$(CONFIG_DRM_LONTIUM_LT9611) += lt9611.o > obj-$(CONFIG_DRM_LVDS_CODEC) += lvds-codec.o > obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o > obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o > diff --git a/drivers/gpu/drm/bridge/lt9611.c b/drivers/gpu/drm/bridge/lt9611.c > new file mode 100644 > index 000000000000..e6e7ce43980d > --- /dev/null > +++ b/drivers/gpu/drm/bridge/lt9611.c > @@ -0,0 +1,1113 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Copyright (c) 2018, The Linux Foundation. All rights reserved. > + * Copyright (c) 2019-2020. Linaro Limited. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#define EDID_SEG_SIZE 256 > + > +#define LT9611_4LANES 0 > + > +struct lt9611 { > + struct device *dev; > + struct drm_bridge bridge; > + struct drm_connector connector; > + > + struct regmap *regmap; > + > + struct device_node *dsi0_node; > + struct device_node *dsi1_node; > + struct mipi_dsi_device *dsi0; > + struct mipi_dsi_device *dsi1; > + > + bool ac_mode; > + > + struct gpio_desc *reset_gpio; > + struct gpio_desc *enable_gpio; > + > + bool power_on; > + bool sleep; > + > + struct regulator_bulk_data supplies[2]; > + > + struct i2c_client *client; > + > + enum drm_connector_status status; > + > + u8 edid_buf[EDID_SEG_SIZE]; > + u32 vic; > +}; > + > +#define LT9611_PAGE_CONTROL 0xff > + > +static const struct regmap_range_cfg lt9611_ranges[] = { > + { > + .name = "register_range", > + .range_min = 0, > + .range_max = 0x85ff, > + .selector_reg = LT9611_PAGE_CONTROL, > + .selector_mask = 0xff, > + .selector_shift = 0, > + .window_start = 0, > + .window_len = 0x100, > + }, > +}; > + > +static const struct regmap_config lt9611_regmap_config = { > + .reg_bits = 8, > + .val_bits = 8, > + .max_register = 0xffff, > + .ranges = lt9611_ranges, > + .num_ranges = ARRAY_SIZE(lt9611_ranges), > +}; > + > +struct lt9611_mode { > + u16 hdisplay; > + u16 vdisplay; > + u8 fps; > + u8 lanes; > + u8 intfs; > +}; > + > +static struct lt9611_mode lt9611_modes[] = { > + { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */ > + { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */ > + { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */ > + { 1920, 1080, 24, 3, 1 }, > + { 720, 480, 60, 4, 1 }, > + { 720, 576, 50, 2, 1 }, > + { 640, 480, 60, 2, 1 }, > +}; > + > +static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge) > +{ > + return container_of(bridge, struct lt9611, bridge); > +} > + > +static struct lt9611 *connector_to_lt9611(struct drm_connector *connector) > +{ > + return container_of(connector, struct lt9611, connector); > +} > + > +static int lt9611_mipi_input_analog(struct lt9611 *lt9611) > +{ > + struct reg_sequence reg_cfg[] = { > + { 0x8106, 0x40 }, /*port A rx current*/ > + { 0x810a, 0xfe }, /*port A ldo voltage set*/ > + { 0x810b, 0xbf }, /*enable port A lprx*/ > + { 0x8111, 0x40 }, /*port B rx current*/ > + { 0x8115, 0xfe }, /*port B ldo voltage set*/ > + { 0x8116, 0xbf }, /*enable port B lprx*/ > + > + { 0x811c, 0x03 }, /*PortA clk lane no-LP mode*/ > + { 0x8120, 0x03 }, /*PortB clk lane with-LP mode*/ > + }; > + > + regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); > + > + return 0; > +} > + > +static int lt9611_mipi_input_digital(struct lt9611 *lt9611, > + const struct drm_display_mode *mode) > +{ > + regmap_write(lt9611->regmap, 0x8300, LT9611_4LANES); > + > + if (mode->hdisplay == 3840) > + regmap_write(lt9611->regmap, 0x830a, 0x03); > + else > + regmap_write(lt9611->regmap, 0x830a, 0x00); > + > + regmap_write(lt9611->regmap, 0x824f, 0x80); > + regmap_write(lt9611->regmap, 0x8250, 0x10); > + regmap_write(lt9611->regmap, 0x8302, 0x0a); > + regmap_write(lt9611->regmap, 0x8306, 0x0a); > + > + return 0; > +} > + > +static void lt9611_mipi_video_setup(struct lt9611 *lt9611, > + const struct drm_display_mode *mode) > +{ > + u32 h_total, h_act, hpw, hfp, hss; > + u32 v_total, v_act, vpw, vfp, vss; > + > + h_total = mode->htotal; > + v_total = mode->vtotal; > + > + h_act = mode->hdisplay; > + hpw = mode->hsync_end - mode->hsync_start; > + hfp = mode->hsync_start - mode->hdisplay; > + hss = (mode->hsync_end - mode->hsync_start) + > + (mode->htotal - mode->hsync_end); > + > + v_act = mode->vdisplay; > + vpw = mode->vsync_end - mode->vsync_start; > + vfp = mode->vsync_start - mode->vdisplay; > + vss = (mode->vsync_end - mode->vsync_start) + > + (mode->vtotal - mode->vsync_end); > + > + regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256)); > + regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256)); > + > + regmap_write(lt9611->regmap, 0x830f, (u8)(v_act / 256)); > + regmap_write(lt9611->regmap, 0x8310, (u8)(v_act % 256)); > + > + regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256)); > + regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256)); > + > + regmap_write(lt9611->regmap, 0x8313, (u8)(h_act / 256)); > + regmap_write(lt9611->regmap, 0x8314, (u8)(h_act % 256)); > + > + regmap_write(lt9611->regmap, 0x8315, (u8)(vpw % 256)); > + regmap_write(lt9611->regmap, 0x8316, (u8)(hpw % 256)); > + > + regmap_write(lt9611->regmap, 0x8317, (u8)(vfp % 256)); > + > + regmap_write(lt9611->regmap, 0x8318, (u8)(vss % 256)); > + > + regmap_write(lt9611->regmap, 0x8319, (u8)(hfp % 256)); > + > + regmap_write(lt9611->regmap, 0x831a, (u8)(hss / 256)); > + regmap_write(lt9611->regmap, 0x831b, (u8)(hss % 256)); > +} > + > +static int lt9611_pcr_setup(struct lt9611 *lt9611, > + const struct drm_display_mode *mode) > +{ > + struct reg_sequence reg_cfg[] = { > + { 0x830b, 0x01 }, > + { 0x830c, 0x10 }, > + { 0x8348, 0x00 }, > + { 0x8349, 0x81 }, > + > + /* stage 1 */ > + { 0x8321, 0x4a }, > + { 0x8324, 0x71 }, > + { 0x8325, 0x30 }, > + { 0x832a, 0x01 }, > + > + /* stage 2 */ > + { 0x834a, 0x40 }, > + { 0x831d, 0x10 }, > + > + /* MK limit */ > + { 0x832d, 0x38 }, > + { 0x8331, 0x08 }, > + }; > + > + regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); > + > + switch (mode->hdisplay) { > + case 640: > + regmap_write(lt9611->regmap, 0x8326, 0x14); > + break; > + case 1920: > + regmap_write(lt9611->regmap, 0x8326, 0x37); > + break; > + case 3840: > + regmap_write(lt9611->regmap, 0x830b, 0x03); > + regmap_write(lt9611->regmap, 0x830c, 0xd0); > + regmap_write(lt9611->regmap, 0x8348, 0x03); > + regmap_write(lt9611->regmap, 0x8349, 0xe0); > + regmap_write(lt9611->regmap, 0x8324, 0x72); > + regmap_write(lt9611->regmap, 0x8325, 0x00); > + regmap_write(lt9611->regmap, 0x832a, 0x01); > + regmap_write(lt9611->regmap, 0x834a, 0x10); > + regmap_write(lt9611->regmap, 0x831d, 0x10); > + regmap_write(lt9611->regmap, 0x8326, 0x37); > + break; > + } > + > + /* pcr rst */ > + regmap_write(lt9611->regmap, 0x8011, 0x5a); > + regmap_write(lt9611->regmap, 0x8011, 0xfa); > + > + return 0; > +} > + > +static int lt9611_pll_setup(struct lt9611 *lt9611, > + const struct drm_display_mode *mode) > +{ > + unsigned int pclk = mode->clock; > + struct reg_sequence reg_cfg[] = { > + /* txpll init */ > + { 0x8123, 0x40 }, > + { 0x8124, 0x64 }, > + { 0x8125, 0x80 }, > + { 0x8126, 0x55 }, > + { 0x812c, 0x37 }, > + { 0x812f, 0x01 }, > + { 0x8126, 0x55 }, > + { 0x8127, 0x66 }, > + { 0x8128, 0x88 }, > + }; > + > + regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); > + > + if (pclk > 150000) > + regmap_write(lt9611->regmap, 0x812d, 0x88); > + else if (pclk > 70000) > + regmap_write(lt9611->regmap, 0x812d, 0x99); > + else > + regmap_write(lt9611->regmap, 0x812d, 0xaa); > + > + regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */ > + regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */ > + regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */ > + > + regmap_write(lt9611->regmap, 0x82de, 0x20); > + regmap_write(lt9611->regmap, 0x82de, 0xe0); > + > + regmap_write(lt9611->regmap, 0x8016, 0xf1); > + regmap_write(lt9611->regmap, 0x8016, 0xf3); > + > + return 0; > +} > + > +static int lt9611_video_check(struct lt9611 *lt9611) > +{ > + u32 v_total, v_act, h_act_a, h_act_b, h_total_sysclk; > + unsigned int temp; > + int ret; > + > + /* top module video check */ > + > + /* v_act */ > + ret = regmap_read(lt9611->regmap, 0x8282, &temp); > + if (ret) > + goto end; > + > + v_act = temp << 8; > + ret = regmap_read(lt9611->regmap, 0x8283, &temp); > + if (ret) > + goto end; > + v_act = v_act + temp; > + > + /* v_total */ > + ret = regmap_read(lt9611->regmap, 0x826c, &temp); > + if (ret) > + goto end; > + v_total = temp << 8; > + ret = regmap_read(lt9611->regmap, 0x826d, &temp); > + if (ret) > + goto end; > + v_total = v_total + temp; > + > + /* h_total_sysclk */ > + ret = regmap_read(lt9611->regmap, 0x8286, &temp); > + if (ret) > + goto end; > + h_total_sysclk = temp << 8; > + ret = regmap_read(lt9611->regmap, 0x8287, &temp); > + if (ret) > + goto end; > + h_total_sysclk = h_total_sysclk + temp; > + > + /* h_act_a */ > + ret = regmap_read(lt9611->regmap, 0x8382, &temp); > + if (ret) > + goto end; > + h_act_a = temp << 8; > + ret = regmap_read(lt9611->regmap, 0x8383, &temp); > + if (ret) > + goto end; > + h_act_a = (h_act_a + temp) / 3; > + > + /* h_act_b */ > + ret = regmap_read(lt9611->regmap, 0x8386, &temp); > + if (ret) > + goto end; > + h_act_b = temp << 8; > + ret = regmap_read(lt9611->regmap, 0x8387, &temp); > + if (ret) > + goto end; > + h_act_b = (h_act_b + temp) / 3; > + > + dev_info(lt9611->dev, > + "video check: h_act_a=%d, h_act_b=%d, v_act=%d, v_total=%d, h_total_sysclk=%d\n", > + h_act_a, h_act_b, v_act, v_total, h_total_sysclk); > + > + return 0; > + > +end: > + dev_err(lt9611->dev, "read video check error\n"); > + return ret; > +} > + > +static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611) > +{ > + regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic); > + regmap_write(lt9611->regmap, 0x8447, lt9611->vic); > + regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */ > + > + regmap_write(lt9611->regmap, 0x82d6, 0x8c); > + regmap_write(lt9611->regmap, 0x82d7, 0x04); > +} > + > +static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611) > +{ > + struct reg_sequence reg_cfg[] = { > + { 0x8130, 0x6a }, > + { 0x8131, 0x44 }, /* HDMI DC mode */ > + { 0x8132, 0x4a }, > + { 0x8133, 0x0b }, > + { 0x8134, 0x00 }, > + { 0x8135, 0x00 }, > + { 0x8136, 0x00 }, > + { 0x8137, 0x44 }, > + { 0x813f, 0x0f }, > + { 0x8140, 0xa0 }, > + { 0x8141, 0xa0 }, > + { 0x8142, 0xa0 }, > + { 0x8143, 0xa0 }, > + { 0x8144, 0x0a }, > + }; > + > + /* HDMI AC mode */ > + if (lt9611->ac_mode) > + reg_cfg[2].def = 0x73; > + > + regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg)); > +} > + > +static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id) > +{ > + struct lt9611 *lt9611 = dev_id; > + unsigned int irq_flag0 = 0; > + unsigned int irq_flag3 = 0; > + > + regmap_read(lt9611->regmap, 0x820f, &irq_flag3); > + regmap_read(lt9611->regmap, 0x820c, &irq_flag0); > + > + pr_debug("%s() irq_flag0: %#x irq_flag3: %#x\n", > + __func__, irq_flag0, irq_flag3); > + > + /* hpd changed low */ > + if (irq_flag3 & 0x80) { > + dev_info(lt9611->dev, "hdmi cable disconnected\n"); > + > + regmap_write(lt9611->regmap, 0x8207, 0xbf); > + regmap_write(lt9611->regmap, 0x8207, 0x3f); > + } > + /* hpd changed high */ > + if (irq_flag3 & 0x40) { > + dev_info(lt9611->dev, "hdmi cable connected\n"); > + > + regmap_write(lt9611->regmap, 0x8207, 0x7f); > + regmap_write(lt9611->regmap, 0x8207, 0x3f); > + } > + > + if (irq_flag3 & 0xc0) > + drm_kms_helper_hotplug_event(lt9611->bridge.dev); > + > + /* video input changed */ > + if (irq_flag0 & 0x01) { > + dev_info(lt9611->dev, "video input changed\n"); > + regmap_write(lt9611->regmap, 0x829e, 0xff); > + regmap_write(lt9611->regmap, 0x829e, 0xf7); > + regmap_write(lt9611->regmap, 0x8204, 0xff); > + regmap_write(lt9611->regmap, 0x8204, 0xfe); > + } > + > + return IRQ_HANDLED; > +} > + > +static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611) > +{ > + unsigned int val; > + > + dev_dbg(lt9611->dev, "enabling hpd interrupts\n"); > + > + regmap_read(lt9611->regmap, 0x8203, &val); > + > + val &= ~0xc0; > + regmap_write(lt9611->regmap, 0x8203, val); > + regmap_write(lt9611->regmap, 0x8207, 0xff); //clear > + regmap_write(lt9611->regmap, 0x8207, 0x3f); > +} > + > +static void lt9611_sleep_setup(struct lt9611 *lt9611) > +{ > + struct reg_sequence sleep_setup[] = { > + { 0x8024, 0x76 }, > + { 0x8023, 0x01 }, > + { 0x8157, 0x03 }, //set addr pin as output > + { 0x8149, 0x0b }, > + { 0x8151, 0x30 }, //disable IRQ > + { 0x8102, 0x48 }, //MIPI Rx power down > + { 0x8123, 0x80 }, > + { 0x8130, 0x00 }, > + { 0x8100, 0x01 }, //bandgap power down > + { 0x8101, 0x00 }, //system clk power down > + }; > + > + dev_dbg(lt9611->dev, "sleep\n"); > + > + regmap_multi_reg_write(lt9611->regmap, > + sleep_setup, ARRAY_SIZE(sleep_setup)); > + lt9611->sleep = true; > +} > + > +static int lt9611_power_on(struct lt9611 *lt9611) > +{ > + int ret; > + const struct reg_sequence seq[] = { > + /* LT9611_System_Init */ > + { 0x8101, 0x18 }, /* sel xtal clock */ > + > + /* timer for frequency meter */ > + { 0x821b, 0x69 }, /*timer 2*/ > + { 0x821c, 0x78 }, > + { 0x82cb, 0x69 }, /*timer 1 */ > + { 0x82cc, 0x78 }, > + > + /* irq init */ > + { 0x8251, 0x01 }, > + { 0x8258, 0x0a }, /* hpd irq */ > + { 0x8259, 0x80 }, /* hpd debounce width */ > + { 0x829e, 0xf7 }, /* video check irq */ > + > + /* power consumption for work */ > + { 0x8004, 0xf0 }, > + { 0x8006, 0xf0 }, > + { 0x800a, 0x80 }, > + { 0x800b, 0x40 }, > + { 0x800d, 0xef }, > + { 0x8011, 0xfa }, > + }; > + > + if (lt9611->power_on) > + return 0; > + > + dev_dbg(lt9611->dev, "power on\n"); > + > + ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq)); > + if (!ret) > + lt9611->power_on = true; > + > + return ret; > +} > + > +static int lt9611_power_off(struct lt9611 *lt9611) > +{ > + int ret; > + > + dev_dbg(lt9611->dev, "power off\n"); > + > + ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); > + if (!ret) > + lt9611->power_on = false; > + > + return ret; > +} > + > +static void lt9611_reset(struct lt9611 *lt9611) > +{ > + gpiod_set_value_cansleep(lt9611->reset_gpio, 1); > + msleep(20); > + gpiod_set_value_cansleep(lt9611->reset_gpio, 0); > + msleep(20); > + gpiod_set_value_cansleep(lt9611->reset_gpio, 1); > + msleep(100); > +} > + > +static void lt9611_assert_5v(struct lt9611 *lt9611) > +{ > + if (!lt9611->enable_gpio) > + return; > + > + gpiod_set_value_cansleep(lt9611->enable_gpio, 1); > + msleep(20); > +} > + > +static int lt9611_regulator_init(struct lt9611 *lt9611) > +{ > + int ret; > + > + lt9611->supplies[0].supply = "vdd"; > + lt9611->supplies[1].supply = "vcc"; > + ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies); > + if (ret < 0) > + return ret; > + > + return regulator_set_load(lt9611->supplies[0].consumer, 300000); > +} > + > +static int lt9611_regulator_enable(struct lt9611 *lt9611) > +{ > + int ret; > + > + ret = regulator_enable(lt9611->supplies[0].consumer); > + if (ret < 0) > + return ret; > + > + usleep_range(1000, 10000); > + > + ret = regulator_enable(lt9611->supplies[1].consumer); > + if (ret < 0) { > + regulator_disable(lt9611->supplies[0].consumer); > + return ret; > + } > + > + return 0; > +} > + > +static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) { > + if (lt9611_modes[i].hdisplay == mode->hdisplay && > + lt9611_modes[i].vdisplay == mode->vdisplay && > + lt9611_modes[i].fps == drm_mode_vrefresh(mode)) { > + return <9611_modes[i]; > + } > + } > + > + return NULL; > +} > + > +/* connector funcs */ > +static enum drm_connector_status > +lt9611_connector_detect(struct drm_connector *connector, bool force) > +{ > + struct lt9611 *lt9611 = connector_to_lt9611(connector); > + unsigned int reg_val = 0; > + int connected = 0; > + > + regmap_read(lt9611->regmap, 0x825e, ®_val); > + connected = (reg_val & BIT(2)); > + dev_dbg(lt9611->dev, "connected = %x\n", connected); > + > + lt9611->status = connected ? connector_status_connected : > + connector_status_disconnected; > + > + return lt9611->status; > +} > + > +static int lt9611_read_edid(struct lt9611 *lt9611) > +{ > + unsigned int temp; > + int ret = 0; > + int i, j; > + > + memset(lt9611->edid_buf, 0, EDID_SEG_SIZE); > + > + regmap_write(lt9611->regmap, 0x8503, 0xc9); > + > + /* 0xA0 is EDID device address */ > + regmap_write(lt9611->regmap, 0x8504, 0xa0); > + /* 0x00 is EDID offset address */ > + regmap_write(lt9611->regmap, 0x8505, 0x00); > + /* length for read */ > + regmap_write(lt9611->regmap, 0x8506, 0x20); > + regmap_write(lt9611->regmap, 0x8514, 0x7f); > + > + for (i = 0 ; i < 8 ; i++) { > + /* offset address */ > + regmap_write(lt9611->regmap, 0x8505, i * 32); > + regmap_write(lt9611->regmap, 0x8507, 0x36); > + regmap_write(lt9611->regmap, 0x8507, 0x31); > + regmap_write(lt9611->regmap, 0x8507, 0x37); > + usleep_range(5000, 10000); > + > + regmap_read(lt9611->regmap, 0x8540, &temp); > + > + if (temp & 0x02) { /*KEY_DDC_ACCS_DONE=1*/ > + for (j = 0; j < 32; j++) { > + regmap_read(lt9611->regmap, 0x8583, &temp); > + lt9611->edid_buf[i * 32 + j] = temp; > + } > + } else if (temp & 0x50) { /* DDC No Ack or Abitration lost */ > + dev_err(lt9611->dev, "read edid failed: no ack\n"); > + ret = -EIO; > + goto end; > + } else { > + dev_err(lt9611->dev, > + "read edid failed: access not done\n"); > + ret = -EIO; > + goto end; > + } > + } > + > + dev_dbg(lt9611->dev, "read edid succeeded, checksum = 0x%x\n", > + lt9611->edid_buf[255]); > + > +end: > + regmap_write(lt9611->regmap, 0x8507, 0x1f); > + return ret; > +} > + > +/* TODO: add support for more extension blocks */ > +static int > +lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) > +{ > + struct lt9611 *lt9611 = data; > + int ret; > + > + dev_dbg(lt9611->dev, "get edid block: block=%d, len=%d\n", > + block, (int)len); > + > + if (len > 128) > + return -EINVAL; > + > + /* support up to 1 extension block */ > + if (block > 1) > + return -EINVAL; > + > + if (block == 0) { > + /* always read 2 edid blocks once */ > + ret = lt9611_read_edid(lt9611); > + if (ret) { > + dev_err(lt9611->dev, "edid read failed\n"); > + return ret; > + } > + } > + > + if (block % 2 == 0) > + memcpy(buf, lt9611->edid_buf, len); > + else > + memcpy(buf, lt9611->edid_buf + 128, len); > + > + return 0; > +} > + > +static int lt9611_connector_get_modes(struct drm_connector *connector) > +{ > + struct lt9611 *lt9611 = connector_to_lt9611(connector); > + unsigned int count; > + struct edid *edid; > + > + dev_dbg(lt9611->dev, "get modes\n"); > + > + lt9611_power_on(lt9611); > + edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611); > + drm_connector_update_edid_property(connector, edid); > + count = drm_add_edid_modes(connector, edid); > + kfree(edid); > + > + return count; > +} > + > +static enum drm_mode_status > +lt9611_connector_mode_valid(struct drm_connector *connector, > + struct drm_display_mode *mode) > +{ > + struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); > + > + return lt9611_mode ? MODE_OK : MODE_BAD; > +} > + > +/* bridge funcs */ > +static void lt9611_bridge_enable(struct drm_bridge *bridge) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + > + dev_dbg(lt9611->dev, "bridge enable\n"); > + > + if (lt9611_power_on(lt9611)) { > + dev_err(lt9611->dev, "power on failed\n"); > + return; > + } > + > + dev_dbg(lt9611->dev, "video on\n"); > + > + lt9611_mipi_input_analog(lt9611); > + lt9611_hdmi_tx_digital(lt9611); > + lt9611_hdmi_tx_phy(lt9611); > + > + msleep(500); > + > + lt9611_video_check(lt9611); > + > + /* Enable HDMI output */ > + regmap_write(lt9611->regmap, 0x8130, 0xea); > +} > + > +static void lt9611_bridge_disable(struct drm_bridge *bridge) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + int ret; > + > + dev_dbg(lt9611->dev, "bridge disable\n"); > + > + /* Disable HDMI output */ > + ret = regmap_write(lt9611->regmap, 0x8130, 0x6a); > + if (ret) { > + dev_err(lt9611->dev, "video on failed\n"); > + return; > + } > + > + if (lt9611_power_off(lt9611)) { > + dev_err(lt9611->dev, "power on failed\n"); > + return; > + } > +} > + > +static struct > +drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = { > + .get_modes = lt9611_connector_get_modes, > + .mode_valid = lt9611_connector_mode_valid, > +}; > + > +static const struct drm_connector_funcs lt9611_bridge_connector_funcs = { > + .fill_modes = drm_helper_probe_single_connector_modes, > + .detect = lt9611_connector_detect, > + .destroy = drm_connector_cleanup, > + .reset = drm_atomic_helper_connector_reset, > + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > +}; > + > +static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611, > + struct device_node *dsi_node) > +{ > + const struct mipi_dsi_device_info info = { "lt9611", 0, NULL }; > + struct mipi_dsi_device *dsi; > + struct mipi_dsi_host *host; > + int ret; > + > + host = of_find_mipi_dsi_host_by_node(dsi_node); > + if (!host) { > + dev_err(lt9611->dev, "failed to find dsi host\n"); > + return ERR_PTR(-EPROBE_DEFER); > + } > + > + dsi = mipi_dsi_device_register_full(host, &info); > + if (IS_ERR(dsi)) { > + dev_err(lt9611->dev, "failed to create dsi device\n"); > + return dsi; > + } > + > + dsi->lanes = 4; > + dsi->format = MIPI_DSI_FMT_RGB888; > + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | > + MIPI_DSI_MODE_VIDEO_HSE; > + > + ret = mipi_dsi_attach(dsi); > + if (ret < 0) { > + dev_err(lt9611->dev, "failed to attach dsi to host\n"); > + mipi_dsi_device_unregister(dsi); > + return ERR_PTR(ret); > + } > + > + return dsi; > +} > + > +static int lt9611_bridge_attach(struct drm_bridge *bridge, > + enum drm_bridge_attach_flags flags) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + int ret; > + > + dev_dbg(lt9611->dev, "bridge attach\n"); Connector creation in bridge drivers is deprecated. Please at least add support for the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag, to make connector creation optional. Ideally the !DRM_BRIDGE_ATTACH_NO_CONNECTOR case should not be implemented at all. This will require the display controller driver to use DRM_BRIDGE_ATTACH_NO_CONNECTOR. Which display controller(s) do you use this driver with ? > + > + ret = drm_connector_init(bridge->dev, <9611->connector, > + <9611_bridge_connector_funcs, > + DRM_MODE_CONNECTOR_HDMIA); > + if (ret) { > + DRM_ERROR("Failed to initialize connector with drm\n"); > + return ret; > + } > + > + drm_connector_helper_add(<9611->connector, > + <9611_bridge_connector_helper_funcs); > + drm_connector_attach_encoder(<9611->connector, bridge->encoder); > + > + if (!bridge->encoder) { > + DRM_ERROR("Parent encoder object not found"); > + return -ENODEV; > + } > + > + /* Attach primary DSI */ > + lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node); > + if (IS_ERR(lt9611->dsi0)) > + return PTR_ERR(lt9611->dsi0); > + > + /* Attach secondary DSI, if specified */ > + if (lt9611->dsi1_node) { > + lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node); > + if (IS_ERR(lt9611->dsi1)) { > + ret = PTR_ERR(lt9611->dsi1); > + goto err_unregister_dsi0; > + } > + } > + > + return 0; > + > +err_unregister_dsi0: > + mipi_dsi_device_unregister(lt9611->dsi0); > + > + return ret; > +} > + > +static void lt9611_bridge_detach(struct drm_bridge *bridge) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + > + if (lt9611->dsi1) { > + mipi_dsi_detach(lt9611->dsi1); > + mipi_dsi_device_unregister(lt9611->dsi1); > + } > + > + mipi_dsi_detach(lt9611->dsi0); > + mipi_dsi_device_unregister(lt9611->dsi0); > +} > + > +static enum drm_mode_status > +lt9611_bridge_mode_valid(struct drm_bridge *bridge, > + const struct drm_display_mode *mode) > +{ > + struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode); > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + > + if (lt9611_mode->intfs > 1 && !lt9611->dsi1) > + return MODE_PANEL; > + else > + return MODE_OK; > +} > + > +static void lt9611_bridge_pre_enable(struct drm_bridge *bridge) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + > + dev_dbg(lt9611->dev, "bridge pre_enable\n"); > + > + if (!lt9611->sleep) > + return; > + > + lt9611_reset(lt9611); > + regmap_write(lt9611->regmap, 0x80ee, 0x01); > + > + lt9611->sleep = false; > +} > + > +static void lt9611_bridge_post_disable(struct drm_bridge *bridge) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + > + dev_dbg(lt9611->dev, "bridge post_disable\n"); > + > + lt9611_sleep_setup(lt9611); > +} > + > +static void lt9611_bridge_mode_set(struct drm_bridge *bridge, > + const struct drm_display_mode *mode, > + const struct drm_display_mode *adj_mode) > +{ > + struct lt9611 *lt9611 = bridge_to_lt9611(bridge); > + struct hdmi_avi_infoframe avi_frame; > + int ret; > + > + dev_dbg(lt9611->dev, "bridge mode_set: hdisplay=%d, vdisplay=%d, vrefresh=%d, clock=%d\n", > + adj_mode->hdisplay, adj_mode->vdisplay, > + adj_mode->vrefresh, adj_mode->clock); > + > + lt9611_bridge_pre_enable(bridge); > + > + lt9611_mipi_input_digital(lt9611, mode); > + lt9611_pll_setup(lt9611, mode); > + lt9611_mipi_video_setup(lt9611, mode); > + lt9611_pcr_setup(lt9611, mode); > + > + ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame, > + <9611->connector, > + mode); > + if (!ret) > + lt9611->vic = avi_frame.video_code; > +} > + > +static const struct drm_bridge_funcs lt9611_bridge_funcs = { > + .attach = lt9611_bridge_attach, > + .detach = lt9611_bridge_detach, > + .mode_valid = lt9611_bridge_mode_valid, > + .enable = lt9611_bridge_enable, > + .disable = lt9611_bridge_disable, > + .post_disable = lt9611_bridge_post_disable, > + .mode_set = lt9611_bridge_mode_set, > +}; > + > +static int lt9611_parse_dt(struct device *dev, > + struct lt9611 *lt9611) > +{ > + lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 1, -1); > + if (!lt9611->dsi0_node) { > + DRM_DEV_ERROR(dev, "failed to get remote node for primary dsi\n"); > + return -ENODEV; > + } > + > + lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 2, -1); > + > + lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode"); > + dev_dbg(lt9611->dev, "ac_mode=%d\n", lt9611->ac_mode); > + > + return 0; > +} > + > +static int lt9611_gpio_init(struct lt9611 *lt9611) > +{ > + struct device *dev = lt9611->dev; > + > + lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); > + if (IS_ERR(lt9611->reset_gpio)) { > + dev_err(dev, "failed to acquire reset gpio\n"); > + return PTR_ERR(lt9611->reset_gpio); > + } > + > + lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable", > + GPIOD_OUT_LOW); > + if (IS_ERR(lt9611->enable_gpio)) { > + dev_err(dev, "failed to acquire enable gpio\n"); > + return PTR_ERR(lt9611->enable_gpio); > + } > + > + return 0; > +} > + > +static int lt9611_read_device_rev(struct lt9611 *lt9611) > +{ > + unsigned int rev; > + int ret; > + > + regmap_write(lt9611->regmap, 0x80ee, 0x01); > + ret = regmap_read(lt9611->regmap, 0x8002, &rev); > + if (ret) > + dev_err(lt9611->dev, "failed to read revision: %d\n", ret); > + > + dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev); > + > + return ret; > +} > + > +static int lt9611_probe(struct i2c_client *client, > + const struct i2c_device_id *id) > +{ > + struct lt9611 *lt9611; > + struct device *dev = &client->dev; > + int ret; > + > + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { > + dev_err(dev, "device doesn't support I2C\n"); > + return -ENODEV; > + } > + > + lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL); > + if (!lt9611) > + return -ENOMEM; > + > + lt9611->dev = &client->dev; > + lt9611->client = client; > + lt9611->sleep = false; > + > + lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config); > + if (IS_ERR(lt9611->regmap)) { > + DRM_ERROR("regmap i2c init failed\n"); > + return PTR_ERR(lt9611->regmap); > + } > + > + ret = lt9611_parse_dt(&client->dev, lt9611); > + if (ret) { > + dev_err(dev, "failed to parse device tree\n"); > + return ret; > + } > + > + ret = lt9611_gpio_init(lt9611); > + if (ret < 0) > + return ret; > + > + ret = lt9611_regulator_init(lt9611); > + if (ret < 0) > + return ret; > + > + lt9611_assert_5v(lt9611); > + > + ret = lt9611_regulator_enable(lt9611); > + if (ret) > + return ret; > + > + lt9611_reset(lt9611); > + > + ret = lt9611_read_device_rev(lt9611); > + if (ret) { > + dev_err(dev, "failed to read chip rev\n"); > + goto err_disable_regulators; > + } > + > + ret = devm_request_threaded_irq(dev, client->irq, NULL, > + lt9611_irq_thread_handler, > + IRQF_ONESHOT, "lt9611", lt9611); > + if (ret) { > + dev_err(dev, "failed to request irq\n"); > + goto err_disable_regulators; > + } > + > + i2c_set_clientdata(client, lt9611); > + > + lt9611->bridge.funcs = <9611_bridge_funcs; > + lt9611->bridge.of_node = client->dev.of_node; > + > + drm_bridge_add(<9611->bridge); > + > + lt9611_enable_hpd_interrupts(lt9611); > + > + return 0; > + > +err_disable_regulators: > + regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); > + > + of_node_put(lt9611->dsi0_node); > + of_node_put(lt9611->dsi1_node); > + > + return ret; > +} > + > +static int lt9611_remove(struct i2c_client *client) > +{ > + struct lt9611 *lt9611 = i2c_get_clientdata(client); > + > + disable_irq(client->irq); > + drm_bridge_remove(<9611->bridge); > + > + regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies); > + > + of_node_put(lt9611->dsi0_node); > + of_node_put(lt9611->dsi1_node); > + > + return 0; > +} > + > +static struct i2c_device_id lt9611_id[] = { > + { "lontium,lt9611", 0}, > + {} > +}; > + > +static const struct of_device_id lt9611_match_table[] = { > + {.compatible = "lontium,lt9611"}, > + {} > +}; > +MODULE_DEVICE_TABLE(of, lt9611_match_table); > + > +static struct i2c_driver lt9611_driver = { > + .driver = { > + .name = "lt9611", > + .of_match_table = lt9611_match_table, > + }, > + .probe = lt9611_probe, > + .remove = lt9611_remove, > + .id_table = lt9611_id, > +}; > +module_i2c_driver(lt9611_driver); > + > +MODULE_LICENSE("GPL v2"); -- Regards, Laurent Pinchart _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel