Add pixel clock limits to the driver as per TFP410 datasheet: min 25MHz,
max 165MHz.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/bridge/ti-tfp410.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index 6f6d6d1e60ae..108e8cd7ab68 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -167,10 +167,23 @@ 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)
+ return MODE_CLOCK_LOW;
+
+ if (mode->clock > 165000)
+ return MODE_CLOCK_HIGH;
+
+ 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)
--
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