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Date: Thu, 14 Apr 2022 17:49:26 +0530 From: Sankeerth Billakanti <quic_sbillaka@...cinc.com> To: <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>, <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org> CC: Sankeerth Billakanti <quic_sbillaka@...cinc.com>, <robdclark@...il.com>, <seanpaul@...omium.org>, <swboyd@...omium.org>, <quic_kalyant@...cinc.com>, <quic_abhinavk@...cinc.com>, <dianders@...omium.org>, <quic_khsieh@...cinc.com>, <bjorn.andersson@...aro.org>, <sean@...rly.run>, <airlied@...ux.ie>, <daniel@...ll.ch>, <dmitry.baryshkov@...aro.org>, <quic_vproddut@...cinc.com>, <quic_aravindh@...cinc.com>, <steev@...i.org> Subject: [PATCH v7 4/4] Support the eDP modes given by panel The eDP controller does not have a reliable way keep panel powered on to read the sink capabilities. So, the controller driver cannot validate if a mode can be supported by the source. We will rely on the panel driver to populate only the supported modes for now. Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com> --- drivers/gpu/drm/msm/dp/dp_display.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index c7277f0..0f18a16 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -998,6 +998,14 @@ enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge, return -EINVAL; } + /* + * The eDP controller currently does not have a reliable way of + * enabling panel power to read sink capabilities. So, we rely + * on the panel driver to populate only supported modes for now. + */ + if (dp->is_edp) + return MODE_OK; + if ((dp->max_pclk_khz <= 0) || (dp->max_pclk_khz > DP_MAX_PIXEL_CLK_KHZ) || (mode->clock > dp->max_pclk_khz)) -- 2.7.4
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