drm/bridge: lt9611: fix sleep mode setup

[ Upstream commit eca32a5936e29f87e7532754aedb627921cd798d ]

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: 4e9e2250396c ("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
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 7c0a99173b39fec5a00a42923ad2a0cf92a1392f..2714184cc53f4332c4dc750f2205f405edad8c47 100644 (file)
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -448,12 +448,11 @@ 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,