From patchwork Wed Dec 14 12:58:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 13073054 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 47B85C4167B for ; Wed, 14 Dec 2022 13:01:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238513AbiLNNBb (ORCPT ); Wed, 14 Dec 2022 08:01:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238520AbiLNNAt (ORCPT ); Wed, 14 Dec 2022 08:00:49 -0500 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86DDC60C7 for ; Wed, 14 Dec 2022 05:00:44 -0800 (PST) Received: by mail-pl1-x631.google.com with SMTP id t2so3262767ply.2 for ; Wed, 14 Dec 2022 05:00:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amarulasolutions.com; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=aE+Kf4GZG5cBJgW4Glr+nCZ/Jxj375yDCGwPDOZtAag=; b=QYfGH67RCNP4ggltQXFylrBgZVcAg9cRrbZdN1vWHTdLaGFcPMLRvVSRKMRVxOE35t XRXDZK4tFshArITirZrpNslKMeBf09ZzOVPlT38d32Ij9Z9uW4vD/ACxkr9zUqMIn2oZ +aNzZN0m46RtLWUI5b8zf/kLB5E+3kRLLYr4A= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=aE+Kf4GZG5cBJgW4Glr+nCZ/Jxj375yDCGwPDOZtAag=; b=ey1x7eU30/Z/uy7Guo0YfgUMEX6cnanNiFvmIkguBIA2z2TW+fmpot+Gknsrflcouk THGAXeHafMj905MH/eJ4k/t0+WZa+m1l75pRxhycDeCS+sHwqUCKDV4ikRZrFmrZDq+O 3EC8/ndFgT8fgTXUUk4G8S4uwp4BBFzu8ENAzjQLw7Z4NimmqLhUksXtqkvj/9ROobSA 0WRK/O8H5PmUFzVn4I9De2EKKhDGqxAyUq++W7pzkXviw07lY44EANw99tvnKB0xQEII ERTx9d3cUJF4M/MAkhcgLiyYemHlu1gUJaqWuz3KusX3ykTjF2Ha/2OGg7sgAZQhfLeF tkFg== X-Gm-Message-State: ANoB5pkCjYvnwqPWZ2ks+Ph2DjCmB+NCUycV3ZlS1eNJocLheqsXYPcZ Qw6RoQaMP41OnblbzigFlzd9tA== X-Google-Smtp-Source: AA0mqf7JNLSv0OByMIEhJW/YCj/gWjdNa7I85fBn049iQTXla5BLMm2+FnSQqWbyAvRAcdmsBL0Dzw== X-Received: by 2002:a17:902:7d93:b0:189:666a:8d78 with SMTP id a19-20020a1709027d9300b00189666a8d78mr23375559plm.4.1671022843876; Wed, 14 Dec 2022 05:00:43 -0800 (PST) Received: from localhost.localdomain ([2405:201:c00a:a809:5e03:faf:846e:352d]) by smtp.gmail.com with ESMTPSA id ix17-20020a170902f81100b001895f7c8a71sm1838651plb.97.2022.12.14.05.00.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Dec 2022 05:00:43 -0800 (PST) From: Jagan Teki To: Andrzej Hajda , Inki Dae , Marek Szyprowski , Joonyoung Shim , Seung-Woo Kim , Kyungmin Park , Frieder Schrempf , Fancy Fang , Tim Harvey , Michael Nazzareno Trimarchi , Adam Ford , Neil Armstrong , Robert Foss , Laurent Pinchart , Tommaso Merciai , Marek Vasut Cc: Matteo Lisi , dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, NXP Linux Team , linux-amarula , Jagan Teki Subject: [PATCH v10 10/18] drm: exynos: dsi: Add input_bus_flags Date: Wed, 14 Dec 2022 18:28:59 +0530 Message-Id: <20221214125907.376148-11-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221214125907.376148-1-jagan@amarulasolutions.com> References: <20221214125907.376148-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org LCDIF-DSIM glue logic inverts the HS/VS/DE signals and expecting the i.MX8M Mini/Nano DSI host to add additional Data Enable signal active low (DE_LOW). This makes the valid data transfer on each horizontal line. So, add additional bus flags DE_LOW setting via input_bus_flags for i.MX8M Mini/Nano platforms. Suggested-by: Marek Vasut Signed-off-by: Jagan Teki Reviewed-by: Frieder Schrempf --- Changes for v10, v9: - none Changes for v8: - add DE_LOW for i.MX8M Mini/Nano platforms. Changes for v7, v6: - none Changes for v5: - rebased based on updated bridge changes Changes for v4 - v1: - none drivers/gpu/drm/exynos/exynos_drm_dsi.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 12a40576f937..36820a7b5884 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -1692,6 +1692,10 @@ static const struct component_ops exynos_dsi_component_ops = { .unbind = exynos_dsi_unbind, }; +static const struct drm_bridge_timings dsim_bridge_timings_de_low = { + .input_bus_flags = DRM_BUS_FLAG_DE_LOW, +}; + static int exynos_dsi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1778,6 +1782,10 @@ static int exynos_dsi_probe(struct platform_device *pdev) dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; dsi->bridge.pre_enable_prev_first = true; + /* DE_LOW: i.MX8M Mini/Nano LCDIF-DSIM glue logic inverts HS/VS/DE */ + if (dsi->plat_data->hw_type == DSIM_TYPE_IMX8MM) + dsi->bridge.timings = &dsim_bridge_timings_de_low; + ret = component_add(dev, &exynos_dsi_component_ops); if (ret) goto err_disable_runtime;