Instead of using platform_driver_probe(), use module_platform_driver()
so that we can support deferred probing.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

omapfb requires the panels to have been probed before omapfb's probe. We
currently manage that by having omapfb in late initcall level. However,
a much simpler way is to just change the makefile so that omapfb is
after the panel drivers.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Commit 100c8262 (OMAPDSS: DPI: use new
clock calculation code) breaks dpi.c compilation if DSI is not enabled
in the kernel configuration.

Fix compilation by adding dummy inline functions for the ones that dpi.c
references. The functions will never be called, as dpi.c knows that
there is no DSI device available.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

When not using DSI PLL to generate the pixel clock, but DSS FCK, the
possible pixel clock rates are rather limited. DSS FCK is currently used
on OMAP2 and OMAP3.

When using Beagleboard with a monitor that supports high resolutions,
the clock rates do not match (at least for me) for the monitor's pixel
clocks within the current threshold in the code, which is +/- 1MHz.

This patch widens the search up to +/- 15MHz. The search is done in
steps, i.e. it first tries to find a rather exact clock, than a bit less
exact, etc. so this should not change the cases where a clock was
already found.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

DSS func clock is calculated with prate / div * m. However, the current
omapdss code calculates it with prate * m / div, which yields a slightly
different result when there's a remainder. For example, 432000000 / 14 *
2 = 61714284, but 432000000 * 2 / 14 = 61714285.

In addition to that, the clock framework wants the clock rate given with
clk_set_rate to be higher than the actual (truncated) end result. So, if
prate is 432000000, and div is 14, the real result is 30857142.8571...
We need to call clk_set_rate with 30857143, which gives us a clock of
30857142. That's why we need to use DIV_ROUND_UP() when calling
clk_set_rate.

This patch fixes the clock calculation.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Use devm_clk_get() instead of clk_get() for dss, and for outputs hdmi
and venc. This reduces code and simplifies error handling.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Use dev_pm_ops instead of the deprecated legacy suspend/resume callbacks.
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

DISPC on OMAP5 has a more optimised mechanism of asserting Mstandby to achieve
more power savings when DISPC is configured in Smart Standby mode. This
mechanism leads to underflows when multiple DISPC pipes are enabled.

There is a register field which can let us revert to the older mechanism of
asserting Mstandby. Configure this field to prevent underflows.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

When using a DISPC video pipeline to a fetch a NV12 buffer in a 2D container, we
need to set set a doublestride bit in the video pipe's ATTRIBUTES register. This
is needed because the stride for the UV plane(using a 16 bit Tiler container) is
double the stride for the Y plane(using a 8 bit Tiler container) for the 0 or
180 degree views. The ROW_INC register is meant for the Y plane, and the HW will
calculate the row increment needed for the UV plane by using double the stride
value based on whether this bit is set or not.

Set the bit when we are using a 2D Tiler buffer and when rotation is 0 or 180
degrees. The stride value is the same for 90 and 270 degree Tiler views, hence
the bit shouldn't be set.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Increase the DSS_FCLK and DSI_FCLK max supported frequencies, these come because
some frequencies were increased from OMAP5 ES1 to OMAP5 ES2. We support only
OMAP5 ES2 in the kernel, so replace the ES1 values with ES2 values. Increase the
DSI PLL Fint range, this was previously just copied from the OMAP4 param range
struct.

Fix the maximum DSS_FCLK on OMAP2, it's 133 Mhz according to the TRM.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Each version of OMAP has a limitation on the maximum pixel clock frequency
supported by an overlay manager. This limit isn't checked by omapdss. Add
dispc feats for lcd and tv managers and check whether the target timings can
be supported or not.

The pixel clock limitations are actually more complex. They depend on which OPP
OMAP is in, and they also depend on which encoder is the manager connected to.
The OPP dependence is ignored as DSS forces the PM framework to be on OPP100
when DSS is enabled, and the encoder dependencies are ignored by DISPC for now.
These limits should come from the encoder driver.

The OMAP2 TRM doesn't mention the maximum pixel clock limit. This value is left
as half of DSS_FCLK, as OMAP2 requires the PCD to be atleast 2.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Using devm_clk_get cleans up some code.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Use PTR_RET function instead of IS_ERR and PTR_ERR.
Patch found using coccinelle.
Signed-off-by: NAlexandru Gheorghiu <gheorghiuandru@gmail.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The platform_enable/disable callbacks in board files for VENC omap_dss_device
instances don't do anything. Hence, we can remove these callbacks from the VENC
driver.
Signed-off-by: NArchit Taneja <archit@ti.com>

The n8x0 panel driver now manages the gpios required to configure the panel.
This was previously done in panel_n8x0_data's platform_enable/disable callbacks
defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_n8x0_data struct, which is needed by the panel driver to
configure the gpios connected to the panel. Hence, the uses of
platform_enable/disable ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

The n8x0 panel driver leaves gpio configurations to the platform_enable and
disable calls in the platform's board file. These should happen in the panel
driver itself.

A platform data struct called panel_n8x0_data already exists to hold gpio
numbers and other platform data. However, the gpio requests are expected to be
done in the board file and not the panel driver.

Request all the gpios in the panel driver so that the board files which use
the the panel don't need to do it. This will help in removing the need for the
panel drivers to have platform related callbacks.
Signed-off-by: NArchit Taneja <archit@ti.com>

The picodlp panel driver now manages the gpios required to configure the
panel. This was previously done in omap_dss_device's platform_enable/disable
callbacks defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_generic_dpi_data struct, which is needed by the panel driver
to configure the gpios connected to the panel. Hence, the
platform_enable/disable ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

The picodlp panel driver leaves gpio requests to the platform's board file.
These should happen in the panel driver itself.

A platform data struct called picodlp_panel_data already exists to hold gpio
numbers and other platform data. Request all the gpios in the panel driver so
that the board files which use the the panel don't need to do it.

This will help in removing the need for the panel drivers to have platform
related callbacks.
Signed-off-by: NArchit Taneja <archit@ti.com>

The tpo-td043 panel driver now manages the gpios required to configure the panel.
This was previously done in omap_dss_device's platform_enable/disable callbacks
defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_tpo_td043_data struct, which is needed by the panel driver to
configure the gpios connected to the panel. Hence, the platform_enable/disable
ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

The tpo-td043mtea1 panel driver leaves gpio configurations to the
platform_enable and disable calls in the platform's board file. These should
happen in the panel driver itself.

Create a platform data struct for the panel, this contains the reset gpio
number used by the panel driver, this struct will be passed to the panel driver
as platform data. The driver will request and configure the reset gpio rather
than leaving it to platform callbacks in board files.

This will help in removing the need for the panel drivers to have platform
related callbacks.
Signed-off-by: NArchit Taneja <archit@ti.com>

The nec-nl8048 panel driver now manages the gpios required to configure the
panel. This was previously done in omap_dss_device's platform_enable/disable
callbacks defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_nec_nl8048_data struct, which is needed by the panel driver
to configure the gpios connected to the panel. Hence, the
platform_enable/disable ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

The nec-nl8048hl11-01 panel driver leaves gpio configurations to the
platform_enable and disable calls in the platform's board file. These should
happen in the panel driver itself.

Create a platform data struct for the panel, this contains the gpio numbers
used by the panel driver, this struct will be passed to the panel driver as
platform data. The driver will request and configure these gpios rather than
leaving it to platform callbacks in board files.

This will help in removing the need for the panel drivers to have platform
related callbacks.
Signed-off-by: NArchit Taneja <archit@ti.com>

The acx565akm panel driver leaves gpio configurations to the platform_enable
and disable calls in the platform's board file. These should happen in the panel
driver itself.

Create a platform data struct for the panel, this contains the reset gpio number
used by the panel driver, this struct will be passed to the panel driver as
platform data. The driver will request and configure the reset gpio rather than
leaving it to platform callbacks in board files.

This will help in removing the need for the panel drivers to have platform
related callbacks.
Signed-off-by: NArchit Taneja <archit@ti.com>

The sharp-ls panel driver now manages the gpios required to configure the panel.
This was previously done in omap_dss_device's platform_enable/disable callbacks
defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_sharp_ls037v7dw01_data struct, which is needed by the panel
driver to configure the gpios connected to the panel. Hence, the
platform_enable/disable ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

Move the GPIO handling from board file's platform callbacks to the panel
driver, which gets the gpios via platform data.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The generic dpi panel driver now sets the gpios required to configure the panel.
This was previously done in platform_enable/disable callbacks in board files.

All the board files using generic dpi panel now correctly pass the gpio related
information as platform data, which is needed by the panel driver to configure
the panel. Hence, the platform_enable/disable ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

The lgphilips panel driver now manages the gpios required to configure the
panel. This was previously done in omap_dss_device's platform_enable/disable
callbacks defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_generic_dpi_data struct, which is needed by the panel driver
to configure the gpios connected to the panel. Hence, the
platform_enable/disable ops can be safely removed now.
Signed-off-by: NArchit Taneja <archit@ti.com>

The lgphilips panel driver leaves gpio configurations to the platform_enable
and disable calls in the platform's board file. These should happen in the
panel driver itself.

Use the platform data as defined for generic dpi panels to pass gpio information
to the lgphilips driver.

This will help in removing the need for the panel drivers to have platform
related callbacks.
Signed-off-by: NArchit Taneja <archit@ti.com>

The generic dpi panel driver leaves gpio configurations to the platform_enable
and disable calls in the platform's board file. These should happen in the
panel driver itself.

Add a generic way of passing gpio information to the generic dpi panel driver
via it's platform_data. This information includes the number of gpios used by
the panel, the gpio number and logic level (active high/low) for each gpio. This
gpio data will be used by the driver to request and configure the gpios required
by the panel.

This will help in removing the need for the panel drivers to have platform
related callbacks.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NArchit Taneja <archit@ti.com>

The omap_dss_device structs's max_backlight_level is used to pass maximum
backlight level for the platform. However, no board file using this panel
populates this field. Therefore, we remove it's usage from the panel driver.
Signed-off-by: NArchit Taneja <archit@ti.com>

Use devm_kzalloc instead of kzalloc to allocate driver data for the picodlp
panel driver. This simplifies the driver's probe and remove functions.
Signed-off-by: NArchit Taneja <archit@ti.com>

Use devm_kzalloc instead of kzalloc to allocate driver data for the lg phillips
panel driver. This simplifies the driver's probe and remove functions.

Cc: Steve Sakoman <steve@sakoman.com>
Signed-off-by: NArchit Taneja <archit@ti.com>

Use devm_kzalloc instead of kzalloc to allocate driver data for the generic dpi
panel driver. This simplifies the driver's probe and remove functions.
Signed-off-by: NArchit Taneja <archit@ti.com>

The n8x0 panel contains support to call platform backlight functions.
These are not used by any board, and can be removed.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NArchit Taneja <archit@ti.com>

NEC-nl8048hl11 driver contains support to call platform backlight
functions. These are not used by any board, and can be removed.
Signed-off-by: NArchit Taneja <archit@ti.com>

Sharp ls037v7dw01 driver contains support to call platform backlight
functions. These are not used by any board, and can be removed.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NArchit Taneja <archit@ti.com>

acx565akm has support to call set_backlight/get_backlight in platform
code. They are not used by any board, and thus can be removed from the
driver.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NArchit Taneja <archit@ti.com>

Now that the old clock calculation code is no longer used, we can remove
it from the driver.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Use the new clock calculation code in the DSI driver.

The new code does not need DSI video mode parameters from the panel
driver, like the old code does. Instead the new code is given the normal
video timings, and a few DSI parameters, which are used to create DSI
video timings.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Use the new clock calculation code in the DPI driver.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>