[PATCH] drm/bridge: tfp410: add pclk limits

[Tomi Valkeinen]

Add pixel clock limits to the driver as per TFP410 datasheet: min 25MHz,
max 165MHz.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/bridge/ti-tfp410.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index 6f6d6d1e60ae..f378a8f79bcb 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -167,10 +167,20 @@ static void tfp410_disable(struct drm_bridge *bridge)
 	gpiod_set_value_cansleep(dvi->powerdown, 1);
 }
 
+static enum drm_mode_status tfp410_mode_valid(struct drm_bridge *bridge,
+					      const struct drm_display_mode *mode)
+{
+	if (mode->clock < 25000 || mode->clock > 165000)
+		return MODE_BAD;
+
+	return MODE_OK;
+}
+
 static const struct drm_bridge_funcs tfp410_bridge_funcs = {
 	.attach		= tfp410_attach,
 	.enable		= tfp410_enable,
 	.disable	= tfp410_disable,
+	.mode_valid	= tfp410_mode_valid,
 };
 
 static void tfp410_hpd_work_func(struct work_struct *work)
-- 
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki