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This adds support for display timings provided from device tree.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Let the driver be more informative when something goes wrong.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Reading modes from EDID EEPROMs requires both I2C and EDID support to
be available. As the simple panel driver is also useful without mode
reading support, only built it in if the requirements are met.
Fixes:
In function `simple_panel_get_modes':
simple-panel.c:88: undefined reference to `of_find_i2c_adapter_by_node'
simple-panel.c:91: undefined reference to `edid_read_i2c'
simple-panel.c:95: undefined reference to `edid_to_display_timings'
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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This adds support for simple panels. These are panels which don't need
special handling but can have enable gpios and such. Unlike the Linux
kernel implementation this one is able to understand display-timings
nodes so that it's not necessary to keep a list of all known displays
with their corresponding timings in barebox.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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