| Message ID | 20230108165656.136871-2-dmitry.baryshkov@linaro.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | drm/bridge: lt9611: several fixes and improvements | expand |
On 08/01/2023 17:56, Dmitry Baryshkov wrote: > 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") > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> > --- > drivers/gpu/drm/bridge/lontium-lt9611.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c > index 7c0a99173b39..2714184cc53f 100644 > --- 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, Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c index 7c0a99173b39..2714184cc53f 100644 --- 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,
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") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/gpu/drm/bridge/lontium-lt9611.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)