From 8e6b342cd52437d4652cae9d09873065c1ebae55 Mon Sep 17 00:00:00 2001 From: Algea Cao Date: Tue, 11 Jan 2022 09:49:47 +0800 Subject: [PATCH] drm/bridge: synopsys: dw-hdmi-qp: Increase the delay time when change resolution Signed-off-by: Algea Cao Change-Id: I720b6b9938aa485301049760589bb73733d060bc --- drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c index cd8150b33bbb..ea01addc4083 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c @@ -1323,10 +1323,15 @@ static void hdmi_set_op_mode(struct dw_hdmi_qp *hdmi, { int frl_rate; + /* set sink frl mode disable and wait sink ready */ hdmi_writel(hdmi, 0, FLT_CONFIG0); if (dw_hdmi_support_scdc(hdmi, &connector->display_info)) drm_scdc_writeb(hdmi->ddc, 0x31, 0); - msleep(20); + /* + * some TVs must wait a while before switching frl mode resolution, + * or the signal may not be recognized. + */ + msleep(200); if (!link_cfg->frl_mode) { dev_info(hdmi->dev, "dw hdmi qp use tmds mode\n"); hdmi_modb(hdmi, 0, OPMODE_FRL, LINK_CONFIG0);