Hi!
After the feedback I got on v4, I thought about the current state of the
videomode helper and decided to reengineer it. The most confusion seems to
stem from the fact, that a videomode does not have ranges. And that is correct.
Therefore the description of the display now uses a list of timings.
These timings support ranges, as they do in datasheets (min/typ/max).
A device driver may choose to grep a display-description from the devicetree and
directly work with that (matching parameters according to their range etc.).
Or one can use the former struct videomode to convert from the timings to a videomode
(at the moment it just grabs the typical-value from every timing-parameter).
This videomode on the other hand, can then be converted to a mode the backend wants
(drm_mode_info, fb_videomode,...).
As of now, this intermediate step is a bit, well, unnecessary. But it provides a way
to have a generic videomode and functions to possibly convert back-and-forth.
In the end, this version does the same as of_videomode, but I hope makes the whole
thing a little clearer.
Thanks to everybody who reviewed the previous versions.
Feedback is always welcome.
Regards,
Steffen
----------------------------------------------------------------
Steffen Trumtrar (2):
of: add helper to parse display specs
video: add generic videomode description
Documentation/devicetree/bindings/video/display | 208 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
drivers/of/Kconfig | 5 +++
drivers/of/Makefile | 1 +
drivers/of/of_display.c | 157 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
drivers/video/Makefile | 1 +
drivers/video/videomode.c | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
include/linux/display.h | 85 ++++++++++++++++++++++++++++++++++++++++++
include/linux/of_display.h | 15 ++++++++
include/linux/videomode.h | 38 +++++++++++++++++++
9 files changed, 656 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/display
create mode 100644 drivers/of/of_display.c
create mode 100644 drivers/video/videomode.c
create mode 100644 include/linux/display.h
create mode 100644 include/linux/of_display.h
create mode 100644 include/linux/videomode.h
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