4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Andrey Gusakov <andrey.gusa...@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.ha...@samsung.com> Signed-off-by: Andrey Gusakov <andrey.gusa...@cogentembedded.com> Signed-off-by: Andrzej Hajda <a.ha...@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-3-git-send-email-andrey.gusa...@cogentembedded.com Signed-off-by: Sasha Levin <alexander.le...@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- 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 @@ -1109,7 +1109,10 @@ 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; }
