On Thu, Jul 24, 2025 at 08:50:53PM +0200, Henrik Grimler wrote: > To use MHL we currently need the MHL chip to be permanently on, which > consumes unnecessary power. Let's use extcon attached to MUIC to enable > the MHL chip only if it detects an MHL cable.
Does HPD GPIO reflect the correct state of the cable? What is the order of events in such a case? Should the sii9234 signal to Exynos HDMI that the link is established? > > Signed-off-by: Henrik Grimler <hen...@grimler.se> > --- > v2: add dependency on extcon. Issue reported by kernel test robot > <l...@intel.com> > --- > drivers/gpu/drm/bridge/Kconfig | 1 + > drivers/gpu/drm/bridge/sii9234.c | 89 > ++++++++++++++++++++++++++++++++++++++-- > 2 files changed, 87 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > index > b9e0ca85226a603a24f90c6879d1499f824060cb..f18a083f6e1c6fe40bde5e65a1548acc61a162ae > 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -303,6 +303,7 @@ config DRM_SII902X > config DRM_SII9234 > tristate "Silicon Image SII9234 HDMI/MHL bridge" > depends on OF > + select EXTCON Either this or 'depends on EXTCON || !EXTCON' > help > Say Y here if you want support for the MHL interface. > It is an I2C driver, that detects connection of MHL bridge -- With best wishes Dmitry
