mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2025-01-11 00:04:33 +08:00
3c5824bdc4
The DSI initialization sequence incorrectly assumes that the mode_set() function of the DRM bridge is always called when (re-)enabling the display. This is not necessarily the case. Keeping the device idle in the framebuffer console for a while results in the display being turned off using the disable() function. However, as soon as any key is pressed only (pre_)enable() are called. mode_set() is skipped because the mode has not been changed. In this case, the DSI HS/LP clocks are never turned back on, preventing the display from working. Fix this by moving a part of the initialization sequence from mode_set() to pre_enable(). Keep most of the video mode setup in mode_set() since most of the registers are only dependent on the mode that is set for the panel - there is no need to write them again each time we re-enable the display. Signed-off-by: Stephan Gerhold <stephan@gerhold.net> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20191106165835.2863-7-stephan@gerhold.net |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| mcde_display_regs.h | ||
| mcde_display.c | ||
| mcde_drm.h | ||
| mcde_drv.c | ||
| mcde_dsi_regs.h | ||
| mcde_dsi.c | ||