From patchwork Wed Oct 5 15:13:04 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 12999370 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 50761C433FE for ; Wed, 5 Oct 2022 15:13:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8D33A10E118; Wed, 5 Oct 2022 15:13:32 +0000 (UTC) Received: from mail-io1-xd35.google.com (mail-io1-xd35.google.com [IPv6:2607:f8b0:4864:20::d35]) by gabe.freedesktop.org (Postfix) with ESMTPS id 626BF10E447 for ; Wed, 5 Oct 2022 15:13:29 +0000 (UTC) Received: by mail-io1-xd35.google.com with SMTP id n198so1710111iod.3 for ; Wed, 05 Oct 2022 08:13:29 -0700 (PDT) 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=RQZh1WL8LN/9jE0F7Kfj3L3iyOE3VYmZbk12zg0k2YE=; b=QmcCZNdjvn4xJDQhu1/YU9JkJPrdAbyl4Kc7KfNzdq6AH8j4Qk15udzMAvjGNlLwDf ravXapf48/bcPFQb+zX8AcbMhIpUkjAYVsbg3kZv/pXDz9ZhNqiiYxs2Wul45mEQph0X hvEGxqx7oUbQkJAow9MpjbjKvsmeY0X33QysE= 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=RQZh1WL8LN/9jE0F7Kfj3L3iyOE3VYmZbk12zg0k2YE=; b=BkwDCCRE9OoBj3dtuCpuCRHfdFSStkvTUGlDxg1KxVjBf5gX037Knf2fBxOhykfb67 fXIsQ8qSzsC3wFbrZ4sCCeJxyc8v/GPNZTFbdmlFOdG+n9uCrgH4EvTaN6FisslGPUNp ZPkhFrb3Ef3ZYoJj7pFIYwZsLhifH5CP2mX8mS0NWgQ6UowLNEuxKPph01yem5pdNulc Kn77KgpiMDnL65G3/dkNNZz4L/JVR/UQd6fUU3z5BAO9aaQmE4+F6zr1qz2j/a9vwlfI DMx/cKGr79j7eGAGo2s3jdVtprqOpTnucZ0N/Q5l9JHtP/e19wn+XghMFNQzOKz5rr5l MioA== X-Gm-Message-State: ACrzQf2xHcrJrX/XF6nJ0tV88x6ZzJlGy1o9xYhxaof7HFAtAL5h3C2a 9in4se4FB2c2TDiEx0Hau2LSEA== X-Google-Smtp-Source: AMsMyM55piOjJ29rBh3EAxJKxdmTnLY6qdSde/uB4CpDbefwoxKucpm391ho7Vm67rBWK1zmLX9zqw== X-Received: by 2002:a02:cc85:0:b0:363:3812:9509 with SMTP id s5-20020a02cc85000000b0036338129509mr44215jap.249.1664982808649; Wed, 05 Oct 2022 08:13:28 -0700 (PDT) Received: from j-ThinkPad-E14-Gen-2.stthomas.edu ([140.209.96.21]) by smtp.gmail.com with ESMTPSA id w15-20020a056602034f00b0068a235db030sm7089276iou.27.2022.10.05.08.13.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Oct 2022 08:13:28 -0700 (PDT) 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 Subject: [PATCH v7 05/10] drm: bridge: samsung-dsim: Add atomic_check Date: Wed, 5 Oct 2022 20:43:04 +0530 Message-Id: <20221005151309.7278-6-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221005151309.7278-1-jagan@amarulasolutions.com> References: <20221005151309.7278-1-jagan@amarulasolutions.com> MIME-Version: 1.0 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: linux-samsung-soc@vger.kernel.org, Matteo Lisi , dri-devel@lists.freedesktop.org, NXP Linux Team , linux-amarula , linux-arm-kernel@lists.infradead.org, Jagan Teki Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Look like an explicit fixing up of mode_flags is required for DSIM IP present in i.MX8M Mini/Nano SoCs. At least the LCDIF + DSIM needs active low sync polarities in order to correlate the correct sync flags of the surrounding components in the chain to make sure the whole pipeline can work properly. On the other hand the i.MX 8M Mini Applications Processor Reference Manual, Rev. 3, 11/2020 says. "13.6.3.5.2 RGB interface Vsync, Hsync, and VDEN are active high signals." No clear evidence about whether it can be documentation issues or something, so added a comment FIXME for this and updated the active low sync polarities using SAMSUNG_DSIM_TYPE_IMX8MM hw_type. v7: * fix the hw_type checking logic v6: * none v5: * rebase based new bridge changes [mszyprow] * remove DSIM_QUIRK_FIXUP_SYNC_POL * add hw_type check for sync polarities change. v4: * none v3: * add DSIM_QUIRK_FIXUP_SYNC_POL to handle mode_flasg fixup v2: * none v1: * fix mode flags in atomic_check instead of mode_fixup Signed-off-by: Jagan Teki --- drivers/gpu/drm/bridge/samsung-dsim.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c index 563781bb27c4..b46346232c52 100644 --- a/drivers/gpu/drm/bridge/samsung-dsim.c +++ b/drivers/gpu/drm/bridge/samsung-dsim.c @@ -1315,6 +1315,31 @@ static void samsung_dsim_atomic_post_disable(struct drm_bridge *bridge, pm_runtime_put_sync(dsi->dev); } +static int samsung_dsim_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct samsung_dsim *dsi = bridge_to_dsi(bridge); + struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode; + + if (dsi->plat_data->hw_type == SAMSUNG_DSIM_TYPE_IMX8MM) { + /** + * FIXME: + * At least LCDIF + DSIM needs active low sync, + * but i.MX 8M Mini Applications Processor Reference Manual, + * Rev. 3, 11/2020 says + * + * 13.6.3.5.2 RGB interface + * Vsync, Hsync, and VDEN are active high signals. + */ + adjusted_mode->flags |= (DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); + adjusted_mode->flags &= ~(DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); + } + + return 0; +} + static void samsung_dsim_mode_set(struct drm_bridge *bridge, const struct drm_display_mode *mode, const struct drm_display_mode *adjusted_mode) @@ -1353,6 +1378,7 @@ static const struct drm_bridge_funcs samsung_dsim_bridge_funcs = { .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, + .atomic_check = samsung_dsim_atomic_check, .atomic_pre_enable = samsung_dsim_atomic_pre_enable, .atomic_enable = samsung_dsim_atomic_enable, .atomic_disable = samsung_dsim_atomic_disable,