From patchwork Sat Oct 1 08:06:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 612490 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 7A35CC433FE for ; Sat, 1 Oct 2022 08:08:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229529AbiJAIIt (ORCPT ); Sat, 1 Oct 2022 04:08:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229436AbiJAIIt (ORCPT ); Sat, 1 Oct 2022 04:08:49 -0400 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F6FF37188 for ; Sat, 1 Oct 2022 01:08:43 -0700 (PDT) Received: by mail-pj1-x1033.google.com with SMTP id u92so6074451pjh.3 for ; Sat, 01 Oct 2022 01:08:43 -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; bh=exCDkdGNSGOnQuwt75tA06xXIS/Hfqspfp6d4Hi7GrE=; b=eou1vIfwh6IratgErERpeV/fnv/vqpLNPXVuzy8iqNkg8l1kiHpxG9SiK5Z0bL3fjR p3NWEIk/A2A9kvUEVpJgqMhSceL/lkMFvmnSiF/fT2gFGC5Do0k3NkRsyRW756yeOwgK OolA6E6qITw9q3CnOmK9CSbq/kMYeKpS9Y7Ag= 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; bh=exCDkdGNSGOnQuwt75tA06xXIS/Hfqspfp6d4Hi7GrE=; b=5mGQnXB0vS9rWOIB0l3UArCrDmObFA6Wsz3yzt6XeaZ6DlXm+t6OawpN1x2kjub0S2 EksyrNdFjT99C6oJzkTsHpgmmSP7A44MWA1jgBUYeZzwZ2m8PySXK8UDRwqdCPm5ZJmq 5QaUdNXtovkjaEBthTDSxBuJa81JxaO5sbMk2QM586LJ4wxMzpYriYU69RaHM+lGJ+eC mEvtpLT2/kkiiPVZuvFB2uxbCm08oa8axb+ZBLRpVGDcQxy3BR53t0QD+0CTSQoNv+li T2g46DKbbieSOOWwRSSvwMQPWj4eHpkbcXi6dUUnAdjwI9uCYHdUFE+/xIXcJTIJHZD5 Vi2A== X-Gm-Message-State: ACrzQf3sXJo1OkawUUSBc2z5i6XmnBqoscLtN1EFKye9qrdv9woxZiKt fzDvBrd9R7HPi8b6x5YnR2u1sQ== X-Google-Smtp-Source: AMsMyM7jAth4LCJ/HHdFel4Qc6FGDHJ3waYERRYzDSdbb3siuFo6Pf9ChwiEcxracob6l4JePTLbvg== X-Received: by 2002:a17:903:2288:b0:179:eb73:b9f5 with SMTP id b8-20020a170903228800b00179eb73b9f5mr12795552plh.163.1664611723397; Sat, 01 Oct 2022 01:08:43 -0700 (PDT) Received: from localhost.localdomain ([2405:201:c00a:a073:7254:4392:bc7c:c69]) by smtp.gmail.com with ESMTPSA id c194-20020a624ecb000000b005409c9d2d41sm3167041pfb.62.2022.10.01.01.08.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Oct 2022 01:08:42 -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 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 v6 05/10] drm: bridge: samsung-dsim: Add atomic_check Date: Sat, 1 Oct 2022 13:36:45 +0530 Message-Id: <20221001080650.1007043-6-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221001080650.1007043-1-jagan@amarulasolutions.com> References: <20221001080650.1007043-1-jagan@amarulasolutions.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org 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. 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 0636440e4420..90506be3f2dd 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,