This series makes some small improvements to the tc358768 driver, and
then adds support for long commands, commands that have more than 8
bytes of payload.
This has been tested on Toradex Verdin AM62 board, with a ST7703 based
DSI panel which requires initial configuration using commands that have
8+ bytes.
I tested the following combinations, by observing the panel visually and
the DSI lanes with an oscilloscope:
- HS command transfer, continuous clock
- HS command transfer, non-continuous clock
- LP command transfer, continuous clock
- LP command transfer, non-continuous clock
All except LP + continuous clock work fine. While observing the lanes
with normal oscilloscope is a very high level and vague view of what
exactly is going on the lanes, it still looks good to me: initial
commands are sent in LP, and then video data is being sent in HS, and
clock lane is continuous. However, the panel stays black, so something
is not quite right.
As it doesn't make sense to send commands in LP during initial
configuration, especially with longer commands, I will leave that
particular combination unresolved. I'd be interested to hear if it works
on some other panel.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
Changes in v2:
- Add reviewed-by & tested-by tags
- Rebase on v7.0-rc2
- Link to v1: https://lore.kernel.org/r/20251021-tc358768-v1-0-d590dc6a1a0c@ideasonboard.com
---
Parth Pancholi (1):
drm/bridge: tc358768: Set pre_enable_prev_first for reverse order
Tomi Valkeinen (6):
drm/bridge: tc358768: Fix typo in TC358768_DSI_CONTROL_DIS_MODE
drm/bridge: tc358768: Separate indirect register writes
drm/bridge: tc358768: Support non-continuous clock
drm/bridge: tc358768: Add LP mode command support
drm/bridge: tc358768: Separate video format config
drm/bridge: tc358768: Add support for long command tx via video buffer
drivers/gpu/drm/bridge/tc358768.c | 202 +++++++++++++++++++++++++++++---------
1 file changed, 157 insertions(+), 45 deletions(-)
---
base-commit: 11439c4635edd669ae435eec308f4ab8a0804808
change-id: 20251021-tc358768-93eb23689b7a
Best regards,
--
Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>