linux/drivers
Ondrej Jirman d12d635bb0 drm/panel: st7703: Pick different reset sequence
Switching to a different reset sequence, enabling IOVCC before enabling
VCC.

There also needs to be a delay after enabling the supplies and before
deasserting the reset. The datasheet specifies 1ms after the supplies
reach the required voltage. Use 10-20ms to also give the power supplies
some time to reach the required voltage, too.

This fixes intermittent panel initialization failures and screen
corruption during resume from sleep on panel xingbangda,xbd599 (e.g.
used in PinePhone).

Signed-off-by: Ondrej Jirman <megi@xff.cz>
Signed-off-by: Frank Oltmanns <frank@oltmanns.dev>
Reported-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Tested-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Guido Günther <agx@sigxcpu.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230211171748.36692-2-frank@oltmanns.dev
2023-10-15 14:22:51 +02:00
..
accel accel/ivpu: Add ivpu_bo_vaddr() and ivpu_bo_size() 2023-10-12 12:54:51 +02:00
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gpu drm/panel: st7703: Pick different reset sequence 2023-10-15 14:22:51 +02:00
greybus
hid Merge tag 'drm-misc-next-2023-09-11-1' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2023-09-22 16:28:36 +10:00
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staging Merge tag 'drm-misc-next-2023-09-11-1' of git://anongit.freedesktop.org/drm/drm-misc into drm-next 2023-09-22 16:28:36 +10:00
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usb drm: Add HPD state to drm_connector_oob_hotplug_event() 2023-10-11 13:20:22 +03:00
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video fbdev: Replace fb_pgprotect() with pgprot_framebuffer() 2023-10-12 09:20:46 +02:00
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