| From | Sasha Levin <> | | Subject | [PATCH AUTOSEL for 4.14 081/100] drm/bridge: tc358767: filter out too high modes | | Date | Wed, 24 Jan 2018 04:15:07 +0000 |
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From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
[ Upstream commit 99fc8e963a4c0203dba26a77cf737db6081bca14 ]
Pixel clock limitation for DPI is 154 MHz. Do not accept modes with higher pixel clock rate.
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-3-git-send-email-andrey.gusakov@cogentembedded.com Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- drivers/gpu/drm/bridge/tc358767.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c index e1996dbfb0a1..e571b5e29ae7 100644 --- 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 drm_bridge *bridge, 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; } -- 2.11.0
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