Hi All,
Here is v2 of my patch-series to make the i915 code control the SoC panel- and backlight-enable GPIOs on Bay Trail devices when the VBT indicates that the SoC should be used for backlight control. This fixes the panel not lighting up on various devices when booted with a HDMI monitor connected, in which case the firmware skips initializing the panel as it inits the HDMI instead.
This series has been tested on; and fixes this issue on; the following models:
Peaq C1010 Point of View MOBII TAB-P800W Point of View MOBII TAB-P1005W Terra Pad 1061 Thundersoft TST178 Yours Y8W81
Linus the main change in v2 is the discussed fixing of the patch to export pinctrl_unregister_mappings. Can you please provide a new immutable branch with the new version (assuming the new version is ok)?
Another change on the version is the use of intel_dsi_get_hw_state() to check if the panel is on instead of relying on the current_mode pointer in "[PATCH v2 3/5] drm/i915/dsi: Init panel-enable GPIO to low when the LCD is initially off (v2)".
Other then that there are some small style tweaks addressing comments from Andy and Ville.
Lee, I know you don't like this, but unfortunately this series introcudes some (other) changes to drivers/mfd/intel_soc_pmic_core.c. The GPIO subsys allows only one mapping-table per consumer, so in hindsight adding the code which adds the mapping for the PMIC panel-enable pin to the PMIC mfd driver was a mistake, as the PMIC code is a provider where as mapping-tables are per consumer. The 4th patch fixes this by moving the mapping-table to the i915 code, so that we can also add mappings for some of the pins on the SoC itself. Since this whole series makes change to the i915 code I plan to merge this mfd change to the drm-intel tree.
Regards,
Hans