From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 4.20 243/304] drm/amd/display: validate extended dongle caps Date: Mon, 28 Jan 2019 10:42:40 -0500 Message-ID: <20190128154341.47195-243-sashal@kernel.org> References: <20190128154341.47195-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190128154341.47195-1-sashal@kernel.org> Sender: stable-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wenjing Liu , Alex Deucher , Sasha Levin , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org List-Id: amd-gfx.lists.freedesktop.org From: Wenjing Liu [ Upstream commit 99b922f9ed6a6313c0d2247cde8aa1e4a0bd67e4 ] [why] Some dongle doesn't have a valid extended dongle caps, but we still set the extended dongle caps to be valid. This causes validation fails for all timing. [how] If no dp_hdmi_max_pixel_clk is provided, don't use extended dongle caps. Signed-off-by: Wenjing Liu Reviewed-by: Aric Cyr Reviewed-by: Jun Lei Acked-by: Abdoulaye Berthe Acked-by: Leo Li Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index d91df5ef0cb3..d33a5ebe990b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2240,7 +2240,8 @@ static void get_active_converter_info( translate_dpcd_max_bpc( hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT); - link->dpcd_caps.dongle_caps.extendedCapValid = true; + if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk != 0) + link->dpcd_caps.dongle_caps.extendedCapValid = true; } break; -- 2.19.1