linux-stable/drivers/gpu/drm/msm/Kconfig
Archit Taneja f079f6d999 drm/msm/dsi: Add PHY/PLL for 8x96
Extend the DSI PHY/PLL drivers to support the DSI 14nm PHY/PLL
found on 8x96.

These are picked up from the downstream driver. The PHY part is similar
to the other DSI PHYs. The PLL driver requires some trickery so that
one DSI PLL can drive both the DSIs (i.e, dual DSI mode).

In the case of dual DSI mode. One DSI instance becomes the clock master,
and other the clock slave. The master PLL's output (Byte and Pixel clock)
is fed to both the DSI hosts/PHYs.

When the DSIs are configured in dual DSI mode, the PHY driver communicates
to the PLL driver using msm_dsi_pll_set_usecase() which instance is the
master and which one is the slave. When setting rate, the master PLL also
configures some of the slave PLL/PHY registers which need to be identical
to the master's for correct dual DSI behaviour.

There are 2 PLL post dividers that should have ideally been modelled as
generic clk_divider clocks, but require some customization for dual DSI.
In particular, when the master PLL's post-diviers are set, the slave PLL's
post-dividers need to be set too. The clk_ops for these use clk_divider's
helper ops and flags internally to prevent redundant code.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
2017-02-06 11:28:45 -05:00

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config DRM_MSM
tristate "MSM DRM"
depends on DRM
depends on ARCH_QCOM || (ARM && COMPILE_TEST)
depends on OF && COMMON_CLK
depends on MMU
select REGULATOR
select DRM_KMS_HELPER
select DRM_PANEL
select SHMEM
select TMPFS
select QCOM_SCM
select SND_SOC_HDMI_CODEC if SND_SOC
select SYNC_FILE
default y
help
DRM/KMS driver for MSM/snapdragon.
config DRM_MSM_REGISTER_LOGGING
bool "MSM DRM register logging"
depends on DRM_MSM
default n
help
Compile in support for logging register reads/writes in a format
that can be parsed by envytools demsm tool. If enabled, register
logging can be switched on via msm.reglog=y module param.
config DRM_MSM_HDMI_HDCP
bool "Enable HDMI HDCP support in MSM DRM driver"
depends on DRM_MSM && QCOM_SCM
default y
help
Choose this option to enable HDCP state machine
config DRM_MSM_DSI
bool "Enable DSI support in MSM DRM driver"
depends on DRM_MSM
select DRM_PANEL
select DRM_MIPI_DSI
default y
help
Choose this option if you have a need for MIPI DSI connector
support.
config DRM_MSM_DSI_PLL
bool "Enable DSI PLL driver in MSM DRM"
depends on DRM_MSM_DSI && COMMON_CLK
default y
help
Choose this option to enable DSI PLL driver which provides DSI
source clocks under common clock framework.
config DRM_MSM_DSI_28NM_PHY
bool "Enable DSI 28nm PHY driver in MSM DRM"
depends on DRM_MSM_DSI
default y
help
Choose this option if the 28nm DSI PHY is used on the platform.
config DRM_MSM_DSI_20NM_PHY
bool "Enable DSI 20nm PHY driver in MSM DRM"
depends on DRM_MSM_DSI
default y
help
Choose this option if the 20nm DSI PHY is used on the platform.
config DRM_MSM_DSI_28NM_8960_PHY
bool "Enable DSI 28nm 8960 PHY driver in MSM DRM"
depends on DRM_MSM_DSI
default y
help
Choose this option if the 28nm DSI PHY 8960 variant is used on the
platform.
config DRM_MSM_DSI_14NM_PHY
bool "Enable DSI 14nm PHY driver in MSM DRM (used by MSM8996/APQ8096)"
depends on DRM_MSM_DSI
default y
help
Choose this option if DSI PHY on 8996 is used on the platform.