From patchwork Mon Jun 19 15:59:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 694222 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BC205EB64DA for ; Mon, 19 Jun 2023 16:00:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229824AbjFSQAO (ORCPT ); Mon, 19 Jun 2023 12:00:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230270AbjFSQAO (ORCPT ); Mon, 19 Jun 2023 12:00:14 -0400 Received: from relay8-d.mail.gandi.net (relay8-d.mail.gandi.net [217.70.183.201]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5557A1AB for ; Mon, 19 Jun 2023 09:00:12 -0700 (PDT) X-GND-Sasl: miquel.raynal@bootlin.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1687190411; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7RxqvGc+Vnu9L6WqV48M6yQKClhhajVdInrsIaEVjsY=; b=R7ZzbhLlYoJOjEpOqUlKaOt2+76UcHJtJX05RiuyZvZzqm1qQUKxBHJohSTbEVNrmF9dUh jy9Kfj6t3Vz2ToTNHLz39vLh/yb1xQzsKZbZCm/aXyiyMGHgljPOEe1Nm05SWqNCN/o1+g VfZT2hrFhx4wMs1XrsDvTO5A5u4nguB3QdPg5VvVMW/oDqfHA2cbOaxLqJ19qLcwLpb7wr 5NovqhNOrDe/58nP/1y7KcFPBIVEKkweprb2wR/j8ZyRBpcF8IhlK4tFenjVoQ/7+wAZAZ foEHnkUMCZ8+kYJdQNOV7NY/zq0DLOSP2iyXYWZI9z+I8HARpu1kjOqEYsi8kA== X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com Received: by mail.gandi.net (Postfix) with ESMTPSA id DC3BB1BF213; Mon, 19 Jun 2023 16:00:09 +0000 (UTC) From: Miquel Raynal To: David Airlie , Daniel Vetter , Thierry Reding , Sam Ravnborg , dri-devel@lists.freedesktop.org Cc: Rob Herring , Krzysztof Kozlowski , devicetree@vger.kernel.org, Maxime Ripard , Thomas Petazzoni , Miquel Raynal , Maxime Ripard Subject: [PATCH v3 5/6] drm/panel: sitronix-st7789v: Add EDT ET028013DMA panel support Date: Mon, 19 Jun 2023 17:59:57 +0200 Message-Id: <20230619155958.3119181-6-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230619155958.3119181-1-miquel.raynal@bootlin.com> References: <20230619155958.3119181-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This panel from Emerging Display Technologies Corporation features an ST7789V2 LCD controller panel inside which is almost identical to what the Sitronix panel driver supports. In practice, the module physical size is specific, and experiments show that the display will malfunction if any of the following situation occurs: * Pixel clock is above 3MHz * Pixel clock is not inverted I could not properly identify the reasons behind these failures, scope captures show valid input signals. Signed-off-by: Miquel Raynal Acked-by: Maxime Ripard --- .../gpu/drm/panel/panel-sitronix-st7789v.c | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c index d7c5b3ad1baa..8649966ceae8 100644 --- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c @@ -187,6 +187,21 @@ static const struct drm_display_mode t28cp45tn89_mode = { .flags = DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC, }; +static const struct drm_display_mode et028013dma_mode = { + .clock = 3000, + .hdisplay = 240, + .hsync_start = 240 + 38, + .hsync_end = 240 + 38 + 10, + .htotal = 240 + 38 + 10 + 10, + .vdisplay = 320, + .vsync_start = 320 + 8, + .vsync_end = 320 + 8 + 4, + .vtotal = 320 + 8 + 4 + 4, + .width_mm = 43, + .height_mm = 58, + .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC, +}; + struct st7789_panel_info default_panel = { .mode = &default_mode, .invert_mode = true, @@ -203,6 +218,14 @@ struct st7789_panel_info t28cp45tn89_panel = { DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, }; +struct st7789_panel_info et028013dma_panel = { + .mode = &et028013dma_mode, + .invert_mode = true, + .bus_format = MEDIA_BUS_FMT_RGB666_1X18, + .bus_flags = DRM_BUS_FLAG_DE_HIGH | + DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, +}; + static int st7789v_get_modes(struct drm_panel *panel, struct drm_connector *connector) { @@ -474,6 +497,7 @@ static void st7789v_remove(struct spi_device *spi) static const struct spi_device_id st7789v_spi_id[] = { { "st7789v", (unsigned long) &default_panel }, { "t28cp45tn89-v17", (unsigned long) &t28cp45tn89_panel }, + { "et028013dma", (unsigned long) &et028013dma_panel }, { } }; MODULE_DEVICE_TABLE(spi, st7789v_spi_id); @@ -481,6 +505,7 @@ MODULE_DEVICE_TABLE(spi, st7789v_spi_id); static const struct of_device_id st7789v_of_match[] = { { .compatible = "sitronix,st7789v", .data = &default_panel }, { .compatible = "inanbo,t28cp45tn89-v17", .data = &t28cp45tn89_panel }, + { .compatible = "edt,et028013dma", .data = &et028013dma_panel }, { } }; MODULE_DEVICE_TABLE(of, st7789v_of_match);