Add pixel clock limits to the driver as per TFP410 datasheet: min 25MHz, max 165MHz.
Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com Reviewed-by: Andrzej Hajda a.hajda@samsung.com Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com --- 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)