linux/drivers/gpu/drm/panel/Kconfig
Russell King 50d5ed3992 drm/panel: make DRM_PANEL_LD9040 depend on SPI
Rather than DRM_PANEL_LD9040 selecting SPI, which then results in an
increase in the probability of Kconf reporting circular dependencies
(we're one "select" away from that right now), make this depend on
SPI instead.  This is akin to having some driver select DRM.

Having some drivers depend on a subsystem, and other drivers select a
subsystem is a recipe for circular dependencies, and there's really no
need for it.

The potential circular dependency (which can be caused today by the
addition of selecting DRM_PANEL from DRM_IMX_LDB) is:

  symbol DMADEVICES is selected by SAMSUNG_DMADEV
  symbol SAMSUNG_DMADEV is selected by S3C64XX_PL080
  symbol S3C64XX_PL080 is selected by SPI_S3C64XX
  symbol SPI_S3C64XX depends on SPI
  symbol SPI is selected by DRM_PANEL_LD9040
  symbol DRM_PANEL_LD9040 depends on DRM_PANEL
  symbol DRM_PANEL is selected by DRM_IMX_LDB
  symbol DRM_IMX_LDB depends on MFD_SYSCON
  symbol MFD_SYSCON is selected by POWER_RESET_KEYSTONE
  symbol POWER_RESET_KEYSTONE depends on POWER_SUPPLY
  symbol POWER_SUPPLY is selected by HID_SONY
  symbol HID_SONY depends on NEW_LEDS
  symbol NEW_LEDS is selected by BACKLIGHT_ADP8860
  symbol BACKLIGHT_ADP8860 depends on BACKLIGHT_CLASS_DEVICE
  symbol BACKLIGHT_CLASS_DEVICE is selected by FB_MX3
  symbol FB_MX3 depends on MX3_IPU
  symbol MX3_IPU depends on DMADEVICES

Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-07-14 10:24:58 +02:00

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config DRM_PANEL
bool
depends on DRM
help
Panel registration and lookup framework.
menu "Display Panels"
depends on DRM && DRM_PANEL
config DRM_PANEL_SIMPLE
tristate "support for simple panels"
depends on OF
help
DRM panel driver for dumb panels that need at most a regulator and
a GPIO to be powered up. Optionally a backlight can be attached so
that it can be automatically turned off when the panel goes into a
low power state.
config DRM_PANEL_LD9040
tristate "LD9040 RGB/SPI panel"
depends on OF && SPI
select VIDEOMODE_HELPERS
config DRM_PANEL_S6E8AA0
tristate "S6E8AA0 DSI video mode panel"
depends on OF
select DRM_MIPI_DSI
select VIDEOMODE_HELPERS
endmenu