Files
linux/drivers/gpu/drm/i915/display
Hans de Goede c8c2969bfc drm/i915/dsi: Use unconditional msleep() instead of intel_dsi_msleep()
The intel_dsi_msleep() helper skips sleeping if the MIPI-sequences have
a version of 3 or newer and the panel is in vid-mode.

This is based on the big comment around line 730 which starts with
"Panel enable/disable sequences from the VBT spec.", where
the "v3 video mode seq" column does not have any wait t# entries.

Checking the Windows driver shows that it does always honor
the VBT delays independent of the version of the VBT sequences.

Commit 6fdb335f1c ("drm/i915/dsi: Use unconditional msleep for
the panel_on_delay when there is no reset-deassert MIPI-sequence")
switched to a direct msleep() instead of intel_dsi_msleep()
when there is no MIPI_SEQ_DEASSERT_RESET sequence, to fix
the panel on an Acer Aspire Switch 10 E SW3-016 not turning on.

And now testing on a Nextbook Ares 8A shows that panel_on_delay
must always be honored otherwise the panel will not turn on.

Instead of only always using regular msleep() for panel_on_delay
do as Windows does and always use regular msleep() everywhere
were intel_dsi_msleep() is used and drop the intel_dsi_msleep()
helper.

Changes in v2:
- Replace all intel_dsi_msleep() calls instead of just
  the intel_dsi_msleep(panel_on_delay) call

Cc: stable@vger.kernel.org
Fixes: 6fdb335f1c ("drm/i915/dsi: Use unconditional msleep for the panel_on_delay when there is no reset-deassert MIPI-sequence")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230425194441.68086-1-hdegoede@redhat.com
(cherry picked from commit fa83c12132)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
2023-05-03 08:31:24 +03:00
..
2021-11-23 13:11:42 +02:00
2023-03-09 10:57:15 -08:00
2023-02-17 23:25:15 +02:00
2022-08-31 15:19:39 +03:00
2022-08-19 12:38:54 +03:00
2023-04-06 01:30:12 +03:00
2021-11-23 13:11:39 +02:00