From nobody Fri Dec 19 15:59:29 2025 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 A7E83C83F19 for ; Tue, 29 Aug 2023 18:48:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238276AbjH2SsN (ORCPT ); Tue, 29 Aug 2023 14:48:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238275AbjH2Srq (ORCPT ); Tue, 29 Aug 2023 14:47:46 -0400 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 499CA1A2 for ; Tue, 29 Aug 2023 11:47:44 -0700 (PDT) Received: by mail-pl1-x634.google.com with SMTP id d9443c01a7336-1bf3a2f4528so37325225ad.2 for ; Tue, 29 Aug 2023 11:47:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1693334864; x=1693939664; 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=V46+9RLRUs4jn3oMfUKtRDAEvgB49sGBWfYkBPv0+7o=; b=V/nm6vszO+uvEgAFcBm6ctl27mmYNTIbrvxYVif2P7XV8O9SZ4LQwXasF6coGjMn/T PKadI4pkh9xKzUC4CF1RfTbzxH/u80SEUUHcmsx2hmBOVqzX+ILpLP93898uIus/iEL3 OjamnOk5JD6kmxjUiibEJFzjti2YpMem+i4X4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693334864; x=1693939664; 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=V46+9RLRUs4jn3oMfUKtRDAEvgB49sGBWfYkBPv0+7o=; b=Ir/cBJRKSmGUhF8YS7wlR+ACRT8XCSlVL+qmZc/SQ8lD8RgAOy0OfTBUX0jR7Rc3PN eUOw6QwBWLm5xr+HMXs9JBEkDersuP2a4G24omx+maGbmZKsaJDw+yowi2U8YEpxzWyP vwGuKSb66UUDnpq9Hp1sbruqYFYvqhpfWiSskadUJa0fMipcglD8rhXtI+Pu2VAuZfrj phaZAZJ/Ufe6QL/0qv9WZXxBVhGEkXjqKgLPw9gPkQ27MNip9r1PxkxRE//X4M9/p47N 8amHfuaxwSWLTmFPfzO42iG5Onu8Vwtoonm0KxoOMjmB7dVcW536++bLLNURW7GPkIB+ T0xA== X-Gm-Message-State: AOJu0Yw7S0vyeFeRF/RXZjpoGoOMKVwMm3mOaSTrOx96KtHj7VEFziM/ OMunbYf0Xyjxocf7vBga8za8EQ== X-Google-Smtp-Source: AGHT+IFQ+sayvRTbFlB/yJwtr4beqBjEBFE4xO6oxnY7iGPiTXaDK/H6T4fPE7QuZzDpNy7Vg0mguQ== X-Received: by 2002:a17:902:db0e:b0:1bf:a41:371e with SMTP id m14-20020a170902db0e00b001bf0a41371emr38019313plx.56.1693334863827; Tue, 29 Aug 2023 11:47:43 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:11a:201:d603:22a7:5e5e:d239]) by smtp.gmail.com with ESMTPSA id o15-20020a170902d4cf00b001b9e86e05b7sm9697953plg.0.2023.08.29.11.47.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Aug 2023 11:47:43 -0700 (PDT) From: Stephen Boyd To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev, Sean Paul , dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, Vinod Polimera , Kuogee Hsieh Subject: [PATCH 3/7] drm/msm/dp: Remove dead code related to downstream cap info Date: Tue, 29 Aug 2023 11:47:28 -0700 Message-ID: <20230829184735.2841739-4-swboyd@chromium.org> X-Mailer: git-send-email 2.42.0.rc2.253.gd59a3bf2b4-goog In-Reply-To: <20230829184735.2841739-1-swboyd@chromium.org> References: <20230829184735.2841739-1-swboyd@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" We read the downstream port count and capability info but never use it anywhere. Remove 'ds_port_cnt' and 'ds_cap_info' and any associated code from this driver. Fold the check for 'dfp_present' into a call to drm_dp_is_branch() at the one place it is used to get rid of any member storage related to downstream ports. Cc: Vinod Polimera Cc: Kuogee Hsieh Signed-off-by: Stephen Boyd Reviewed-by: Dmitry Baryshkov Reviewed-by: Kuogee Hsieh Tested-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_panel.c | 25 +++---------------------- drivers/gpu/drm/msm/dp/dp_panel.h | 6 ------ 2 files changed, 3 insertions(+), 28 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_= panel.c index a0523b18b9e9..9fb4e963fefb 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -43,9 +43,7 @@ static void dp_panel_read_psr_cap(struct dp_panel_private= *panel) =20 static int dp_panel_read_dpcd(struct dp_panel *dp_panel) { - int rc =3D 0; - size_t len; - ssize_t rlen; + int rc; struct dp_panel_private *panel; struct dp_link_info *link_info; u8 *dpcd, major, minor; @@ -79,25 +77,8 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel) if (drm_dp_enhanced_frame_cap(dpcd)) link_info->capabilities |=3D DP_LINK_CAP_ENHANCED_FRAMING; =20 - dp_panel->dfp_present =3D dpcd[DP_DOWNSTREAMPORT_PRESENT]; - dp_panel->dfp_present &=3D DP_DWN_STRM_PORT_PRESENT; - - if (dp_panel->dfp_present && (dpcd[DP_DPCD_REV] > 0x10)) { - dp_panel->ds_port_cnt =3D dpcd[DP_DOWN_STREAM_PORT_COUNT]; - dp_panel->ds_port_cnt &=3D DP_PORT_COUNT_MASK; - len =3D DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE; - - rlen =3D drm_dp_dpcd_read(panel->aux, - DP_DOWNSTREAM_PORT_0, dp_panel->ds_cap_info, len); - if (rlen < len) { - DRM_ERROR("ds port status failed, rlen=3D%zd\n", rlen); - rc =3D -EINVAL; - goto end; - } - } - dp_panel_read_psr_cap(panel); -end: + return rc; } =20 @@ -173,7 +154,7 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, return -EINVAL; } =20 - if (dp_panel->dfp_present) { + if (drm_dp_is_branch(dp_panel->dpcd)) { count =3D drm_dp_read_sink_count(panel->aux); if (!count) { DRM_ERROR("no downstream ports connected\n"); diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_= panel.h index 6d733480a62d..3cb1f8dcfd3b 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.h +++ b/drivers/gpu/drm/msm/dp/dp_panel.h @@ -13,9 +13,6 @@ =20 struct edid; =20 -#define DP_DOWNSTREAM_PORTS 4 -#define DP_DOWNSTREAM_CAP_SIZE 4 - struct dp_display_mode { struct drm_display_mode drm_mode; u32 capabilities; @@ -39,9 +36,6 @@ struct dp_panel_psr { struct dp_panel { /* dpcd raw data */ u8 dpcd[DP_RECEIVER_CAP_SIZE]; - u8 ds_cap_info[DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE]; - u32 ds_port_cnt; - u32 dfp_present; =20 struct dp_link_info link_info; struct drm_dp_desc desc; --=20 https://chromeos.dev