drm/bridge: lt9611: fix sleep mode setup

On atomic_post_disable the bridge goes to the low power state. However
the code disables too much of the chip, so the HPD event is not being
detected and delivered to the host. Reduce the power saving in order to
get the HPD event.

Fixes: 23278bf54afe ("drm/bridge: Introduce LT9611 DSI to HDMI bridge")
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230118081658.2198520-2-dmitry.baryshkov@linaro.org

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 3ce4e495aee5083461928eb2daa35d9d20076810..95a962e62ae41859fcf409dd52c8cea44b94a653 100644 (file)
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -449,12 +449,11 @@ static void lt9611_sleep_setup(struct lt9611 *lt9611)
                { 0x8023, 0x01 },
                { 0x8157, 0x03 }, /* set addr pin as output */
                { 0x8149, 0x0b },
-               { 0x8151, 0x30 }, /* disable IRQ */
+
                { 0x8102, 0x48 }, /* MIPI Rx power down */
                { 0x8123, 0x80 },
                { 0x8130, 0x00 },
-               { 0x8100, 0x01 }, /* bandgap power down */
-               { 0x8101, 0x00 }, /* system clk power down */
+               { 0x8011, 0x0a },
        };
 
        regmap_multi_reg_write(lt9611->regmap,