diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c
index 6586c52..e0c353e 100644
--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -712,6 +712,8 @@ static void adv7511_mode_set(struct adv7511 *adv7511,
 	regmap_update_bits(adv7511->regmap, 0x17,
 		0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 
+	drm_mode_copy(&adv7511->curr_mode, adj_mode);
+
 	/*
 	 * TODO Test first order 4:2:2 to 4:4:4 up conversion method, which is
 	 * supposed to give better results.
diff --git a/drivers/gpu/drm/i2c/adv7511.h b/drivers/gpu/drm/i2c/adv7511.h
index 056f747..a9745ea 100644
--- a/drivers/gpu/drm/i2c/adv7511.h
+++ b/drivers/gpu/drm/i2c/adv7511.h
@@ -306,6 +306,8 @@ struct adv7511 {
 	enum drm_connector_status status;
 	bool powered;
 
+	struct drm_display_mode curr_mode;
+
 	unsigned int f_tmds;
 
 	unsigned int current_edid_segment;
@@ -329,6 +331,7 @@ struct adv7511 {
 	struct device_node *host_node;
 	struct mipi_dsi_device *dsi;
 	u8 num_dsi_lanes;
+	bool use_timing_gen;
 
 	enum adv7511_type type;
 };
diff --git a/drivers/gpu/drm/i2c/adv7533.c b/drivers/gpu/drm/i2c/adv7533.c
index ecbcaa0..d002ac4 100644
--- a/drivers/gpu/drm/i2c/adv7533.c
+++ b/drivers/gpu/drm/i2c/adv7533.c
@@ -39,14 +39,65 @@ static const struct regmap_config adv7533_cec_regmap_config = {
 	.cache_type = REGCACHE_RBTREE,
 };
 
+static void adv7511_dsi_config_timing_gen(struct adv7511 *adv)
+{
+	struct mipi_dsi_device *dsi = adv->dsi;
+	struct drm_display_mode *mode = &adv->curr_mode;
+	unsigned int hsw, hfp, hbp, vsw, vfp, vbp;
+	u8 clock_div_by_lanes[] = { 6, 4, 3 };	/* 2, 3, 4 lanes */
+
+	hsw = mode->hsync_end - mode->hsync_start;
+	hfp = mode->hsync_start - mode->hdisplay;
+	hbp = mode->htotal - mode->hsync_end;
+	vsw = mode->vsync_end - mode->vsync_start;
+	vfp = mode->vsync_start - mode->vdisplay;
+	vbp = mode->vtotal - mode->vsync_end;
+
+	/* set pixel clock divider mode */
+	regmap_write(adv->regmap_cec, 0x16,
+		     clock_div_by_lanes[dsi->lanes - 2] << 3);
+
+	/* horizontal porch params */
+	regmap_write(adv->regmap_cec, 0x28, mode->htotal >> 4);
+	regmap_write(adv->regmap_cec, 0x29, (mode->htotal << 4) & 0xff);
+	regmap_write(adv->regmap_cec, 0x2a, hsw >> 4);
+	regmap_write(adv->regmap_cec, 0x2b, (hsw << 4) & 0xff);
+	regmap_write(adv->regmap_cec, 0x2c, hfp >> 4);
+	regmap_write(adv->regmap_cec, 0x2d, (hfp << 4) & 0xff);
+	regmap_write(adv->regmap_cec, 0x2e, hbp >> 4);
+	regmap_write(adv->regmap_cec, 0x2f, (hbp << 4) & 0xff);
+
+	/* vertical porch params */
+	regmap_write(adv->regmap_cec, 0x30, mode->vtotal >> 4);
+	regmap_write(adv->regmap_cec, 0x31, (mode->vtotal << 4) & 0xff);
+	regmap_write(adv->regmap_cec, 0x32, vsw >> 4);
+	regmap_write(adv->regmap_cec, 0x33, (vsw << 4) & 0xff);
+	regmap_write(adv->regmap_cec, 0x34, vfp >> 4);
+	regmap_write(adv->regmap_cec, 0x35, (vfp << 4) & 0xff);
+	regmap_write(adv->regmap_cec, 0x36, vbp >> 4);
+	regmap_write(adv->regmap_cec, 0x37, (vbp << 4) & 0xff);
+}
+
 void adv7533_dsi_power_on(struct adv7511 *adv)
 {
 	struct mipi_dsi_device *dsi = adv->dsi;
 
+	if (adv->use_timing_gen)
+		adv7511_dsi_config_timing_gen(adv);
+
 	/* set number of dsi lanes */
 	regmap_write(adv->regmap_cec, 0x1c, dsi->lanes << 4);
-	/* disable internal timing generator */
-	regmap_write(adv->regmap_cec, 0x27, 0x0b);
+
+	if (adv->use_timing_gen) {
+		/* reset internal timing generator */
+		regmap_write(adv->regmap_cec, 0x27, 0xcb);
+		regmap_write(adv->regmap_cec, 0x27, 0x8b);
+		regmap_write(adv->regmap_cec, 0x27, 0xcb);
+	} else {
+		/* disable internal timing generator */
+		regmap_write(adv->regmap_cec, 0x27, 0x0b);
+	}
+
 	/* enable hdmi */
 	regmap_write(adv->regmap_cec, 0x03, 0x89);
 	/* disable test mode */
@@ -60,6 +111,8 @@ void adv7533_dsi_power_off(struct adv7511 *adv)
 {
 	/* disable hdmi */
 	regmap_write(adv->regmap_cec, 0x03, 0x0b);
+	/* disable internal timing generator */
+	regmap_write(adv->regmap_cec, 0x27, 0x0b);
 }
 
 int adv7533_patch_registers(struct adv7511 *adv)
@@ -179,6 +232,9 @@ int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv)
 	of_node_put(endpoint);
 	of_node_put(adv->host_node);
 
+	adv->use_timing_gen = !of_property_read_bool(np,
+						"adi,disable-timing-generator");
+
 	/* TODO: Check if these need to be parsed by DT or not */
 	adv->rgb = true;
 	adv->embedded_sync = false;
