media: ccs-pll: Switch from standard integer types to kernel ones

The preferred integer types in the kernel are the Linux specific ones,
switch from standard C types to u32 and alike.

The patch has been produced with the following Coccinelle spatch, with few
alignment adjustments:

@@
typedef uint32_t;
typedef u32;
@@
- uint32_t
+ u32

@@
typedef uint16_t;
typedef u16;
@@
- uint16_t
+ u16

@@
typedef uint8_t;
typedef u8;
@@
- uint8_t
+ u8

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Add support for DDR OP system and pixel clocks

Add support for dual data rate operational system and pixel clocks. This
is implemented using two PLL flags.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Add trivial dual PLL support

Add support for sensors that have separate VT and OP domain PLLs.

This support is trivial in the sense that it aims for the same VT pixel
rate than that on the CSI-2 bus. The vast majority of sensors is better
supported by higher frequencies in VT domain in binned and possibly scaled
configurations.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Rework bounds checks

Refactor bounds checks so that the caller can decide what to check. This
allows doing the checks early, when the values are available.

This also adds front OP PLL configuration and limits.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Check for derating and overrating, support non-derating sensors

Some sensors support derating (VT domain speed faster than OP) or
overrating (VT domain speed slower than OP). While this was supported for
the driver, the hardware support for the feature was never verified. Do
that now, and for those devices without that support, VT and OP speeds
have to match.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Add support flexible OP PLL pixel clock divider

Flexible OP PLL pixel clock divider allows a higher OP pixel clock than
what the bus can transfer. This generally makes it easier to select pixel
clock dividers.

This changes how the pixel rate on the bus and minimum VT divisor are
calculated, as the pixel rate is no longer directly determined by the
OP pixel clock and the number of the lanes.

Also add a sanity check for sensors that do not support flexible OP PLL
pixel clock divider. This could have caused the PLL calculator to come up
with an invalid configuration for those devices.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Support two cycles per pixel on OP domain

The l parameter defines the number of clock cycles to process a single
pixel per OP lane. It is calculated based on a new register
op_bits_per_lane.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Add support for extended input PLL clock divider

CCS allows odd PLL dividers other than 1, granted that the corresponding
capability bit is set. Support this both in the PLL calculator and the CCS
driver.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Add support for decoupled OP domain calculation

Add support for decoupled OP domain clock calculation. This means that the
number of VT and OP domain clocks are no longer dependent on the number of
CSI-2 lanes in the lane speed mode.

The support also replaces the existing quirk flag to calculate OP domain
clocks per lane.

Also support decoupled OP domain calculation in the CCS driver.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Add support for lane speed model

CCS PLL includes a capability to calculate the VT clocks on per-lane
basis. Add support for this feature.

Move calculation of the pixel rate on the CSI-2 bus early in the function
as everything needed to calculate it is already available.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Use the BIT macro

Use the BIT macro for setting individual bits.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Document the structs in the header as well as the function

The CCS pll is used by the CCS driver at the moment, but documenting the
interface makes sense. It's non-trivial and the calculator could be used
elsewhere.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Move the flags field down, away from 8-bit fields

This way the struct will use less memory, with better packing and no waste
due to unsigned long.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Differentiate between CSI-2 D-PHY and C-PHY

Differentiate between CSI-2 D-PHY and C-PHY. This does not yet include
support for C-PHY.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Remove parallel bus support

The parallel bus PLL calculation has no users. Remove it.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs-pll: Split limits and PLL configuration into front and back parts

The CCS spec supports a lot of variation in the PLL. Split the PLL in
front and back parts to better prepare for supporting it.

Also use CCS compliant naming for IP and OP PLL frequencies (i.e. include
"clk" in the name).

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ccs: Change my e-mail address

Use my @linux.intel.com e-mail address in the CCS driver.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: smiapp-pll: Rename as ccs-pll

MIPI CCS replaces SMIA and SMIA++ as the current standard. CCS brings new
features while existing functionality will be supported. Rename the
smiapp-pll as ccs-pll accordingly.

Also add Intel copyright to the files.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>