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[46.91.226.206]) by smtp.gmail.com with ESMTPSA id h205sm3542137wmf.35.2019.10.24.09.46.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Oct 2019 09:46:03 -0700 (PDT) From: Thierry Reding To: Thierry Reding Subject: [PATCH 12/32] drm/tegra: dp: Set channel coding on link configuration Date: Thu, 24 Oct 2019 18:45:14 +0200 Message-Id: <20191024164534.132764-13-thierry.reding@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191024164534.132764-1-thierry.reding@gmail.com> References: <20191024164534.132764-1-thierry.reding@gmail.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=6VLoJyLaTalvPJTjL4ZURLjR521ZUnRyrnLxHevvRaM=; b=ehcQLQC5E+gvhhTIBrAdm6Wp2/fRl3wMgXLryA6knIosKQs1Na6Bt/uu5kXL7Z6iiW mVWQqcBO99ZsOdf9dgdA77VZli/eOXxbVcSEogQlhRkgXuUpfAEMWBQZqSj9gvOdxTLC qyvrexZMfLD8VSwaEFzMwNuRnhvCV8eFaaVi0/9SIBNXzEvXSjmh0gn+uLDIfGSoRQDD lP0CAyiXbUkAVsoDdzN92q1JYA71izNNQuOgtGtJyG+vZVB9Wj3GyQBToXHkM5m6PJm3 WhasXUy+NPrhNnivV1XTd695MMrSTusHzVwrsmvABp6DIxiUSa4TYYXfbbVA4sCGzcqi pVdg== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Thierry Reding Make use of ANSI 8B/10B channel coding if the DisplayPort sink supports it. Signed-off-by: Thierry Reding --- drivers/gpu/drm/tegra/dp.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tegra/dp.c b/drivers/gpu/drm/tegra/dp.c index 757a0256592f..ca287b50fad8 100644 --- a/drivers/gpu/drm/tegra/dp.c +++ b/drivers/gpu/drm/tegra/dp.c @@ -203,7 +203,7 @@ int drm_dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link) */ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link) { - u8 values[2]; + u8 values[2], value; int err; values[0] = drm_dp_link_rate_to_bw_code(link->rate); @@ -216,5 +216,14 @@ int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link) if (err < 0) return err; + if (link->caps.channel_coding) + value = DP_SET_ANSI_8B10B; + else + value = 0; + + err = drm_dp_dpcd_writeb(aux, DP_MAIN_LINK_CHANNEL_CODING_SET, value); + if (err < 0) + return err; + return 0; }