Maxime Ripard
ab52af4ba7
drm/connector: hdmi: Add Broadcast RGB property
...
The i915 driver has a property to force the RGB range of an HDMI output.
The vc4 driver then implemented the same property with the same
semantics. KWin has support for it, and a PR for mutter is also there to
support it.
Both drivers implementing the same property with the same semantics,
plus the userspace having support for it, is proof enough that it's
pretty much a de-facto standard now and we can provide helpers for it.
Let's plumb it into the newly created HDMI connector.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com >
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com >
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-18-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 10:24:37 +02:00
Maxime Ripard
26ff1c38fc
drm/connector: hdmi: Compute bpc and format automatically
...
Now that we have all the infrastructure needed, we can add some code
that will, for a given connector state and mode, compute the best output
format and bpc.
The algorithm is equivalent to the one already found in i915 and vc4.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com >
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-15-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 10:24:36 +02:00
Maxime Ripard
e5030a74f9
drm/connector: hdmi: Add custom hook to filter TMDS character rate
...
Most of the HDMI controllers have an upper TMDS character rate limit
they can't exceed. On "embedded"-grade display controllers, it will
typically be lower than what high-grade monitors can provide these days,
so drivers will filter the TMDS character rate based on the controller
capabilities.
To make that easier to handle for drivers, let's provide an optional
hook to be implemented by drivers so they can tell the HDMI controller
helpers if a given TMDS character rate is reachable for them or not.
This will then be useful to figure out the best format and bpc count for
a given mode.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com >
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-13-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 10:12:59 +02:00
Maxime Ripard
f035f4097f
drm/connector: hdmi: Calculate TMDS character rate
...
Most HDMI drivers have some code to calculate the TMDS character rate,
usually to adjust an internal clock to match what the mode requires.
Since the TMDS character rates mostly depends on the resolution, whether
we need to repeat pixels or not, the bpc count and the format, we can
now derive it from the HDMI connector state that stores all those infos
and remove the duplication from drivers.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com >
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-11-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 10:12:26 +02:00
Maxime Ripard
948f01d5e5
drm/connector: hdmi: Add support for output format
...
Just like BPC, we'll add support for automatic selection of the output
format for HDMI connectors.
Let's add the needed defaults and fields for now.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com >
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-7-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 10:12:24 +02:00
Maxime Ripard
aadb3e16b8
drm/connector: hdmi: Add output BPC to the connector state
...
We'll add automatic selection of the output BPC in a following patch,
but let's add it to the HDMI connector state already.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com >
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-4-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 09:57:27 +02:00
Maxime Ripard
54cb39e229
drm/connector: hdmi: Create an HDMI sub-state
...
The next features we will need to share across drivers will need to
store some parameters for drivers to use, such as the selected output
format.
Let's create a new connector sub-state dedicated to HDMI controllers,
that will eventually store everything we need.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com >
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev >
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org >
Link: https://patchwork.freedesktop.org/patch/msgid/20240527-kms-hdmi-connector-state-v15-3-c5af16c3aae2@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org >
2024-05-28 09:57:08 +02:00
