From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrzej Hajda , Andrey Gusakov , Sasha Levin Subject: [PATCH 4.14 107/156] drm/bridge: tc358767: filter out too high modes Date: Fri, 2 Feb 2018 17:58:08 +0100 Message-Id: <20180202140845.029544497@linuxfoundation.org> In-Reply-To: <20180202140840.242829545@linuxfoundation.org> References: <20180202140840.242829545@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrey Gusakov [ Upstream commit 99fc8e963a4c0203dba26a77cf737db6081bca14 ] Pixel clock limitation for DPI is 154 MHz. Do not accept modes with higher pixel clock rate. Reviewed-by: Andrzej Hajda Signed-off-by: Andrey Gusakov Signed-off-by: Andrzej Hajda Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-3-git-send-email-andrey.gusakov@cogentembedded.com Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/bridge/tc358767.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -1103,7 +1103,10 @@ static bool tc_bridge_mode_fixup(struct static int tc_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { - /* Accept any mode */ + /* DPI interface clock limitation: upto 154 MHz */ + if (mode->clock > 154000) + return MODE_CLOCK_HIGH; + return MODE_OK; }