Fix handling of error in omap_dispc_register_isr() in case there are no
free isr slots available.
Reported-by: Ben Tucker <btucker@mpcdata.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Using dss_features to select independent core clock divider and setting
it. Added the register used, to DISPC context save and restore group

-----------------------------------------------------------------------
In OMAP4, the minimum DISPC_CORE_CLK required can be expressed as:

	DISPC_CORE_CLK >= max(PCLK1*HSCALE1, PCLK2*HSCALE2, ...)

Where PCLKi is the pixel clock generated by MANAGERi and HSCALEi is the
maximum horizontal downscaling done through MANAGERi

Based on the usecase, core clk can be increased or decreased at runtime
to save power. Such mechanism are not yet implemented. Hence, we set the
core clock divisor to 1, to support maximum range of resolutions
------------------------------------------------------------------------
Signed-off-by: Raghuveer Murthy <raghuveer.murthy@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

The OMAP4 DISPC_DIVISOR1 is backward compatible to OMAP3xxx DISPC_DIVISOR.
However DISPC_DIVISOR is also provided in OMAP4, to control DISPC_CORE_CLK
independent of Primary and Secondary display clocks.

Renamed DISPC_DIVISOR(ch) to DISPC_DIVISORo(ch), to facilitate introduction
of DISPC_DIVISOR register, which is specific for OMAP4. OMAP4 has 3 registers
DISPC_DIVISOR, DISPC_DIVISOR1 and DISPC_DIVISOR2.

Also updated, all the usages of DISPC_DIVISOR(ch) to DISPC_DIVISORo(ch).
Use DISPC_DIVISORo(ch) when DISPC_DIVISOR1 or DISPC_DIVISOR2 has to be
configured

OMAP4 TRM uses DISPC_DIVISORo generically to refer to DISPC_DIVISOR1 and
DISPC_DIVISOR2
Signed-off-by: Raghuveer Murthy <raghuveer.murthy@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

In OMAP3xxx DISPC_DIVISOR register has a logical clock divisor (lcd_div)
field. The lcd_div is common, for deciding the DISPC core functional clock
frequency, and the final pixel clock frequency for LCD display.

In OMAP4, there are 2 LCD channels, hence two divisor registers, DISPC_DIVISOR1
and DISPC_DIVISOR2. Also, there is a third register DISPC_DIVISOR.

The DISPC_DIVISOR in OMAP4 is used to configure lcd_div exclusively for core
functional clock configuration. For pixel clock configuration of primary and
secondary LCDs, lcd_div of DISPC_DIVISOR1 and DISPC_DIVISOR2 are used
respectively
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Raghuveer Murthy <raghuveer.murthy@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

On omap4 the registers may not be accessible right after enabling the
clocks. At some point this will be handled by pm_runtime, but, for the
time begin, adding a small delay after clk_enable() should make things
work.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

When using OMAP2_DSS_USE_DSI_PLL, which selects DSI PLL as source clock
for DISPC, the DSI needs the vdds_dsi regulator. Latest regulator
changes broke this, causing the the code to not acquire the regulator
when using OMAP2_DSS_USE_DSI_PLL.

This patch acquires the vdds_dsi regulator in dsi_pll_init(), fixing the
issue. This is is just a quick hack to get the OMAP2_DSS_USE_DSI_PLL
option working. There shouldn't be any other downside in this solution
than some extra lines of code.

OMAP2_DSS_USE_DSI_PLL is itself a big hack, and should be removed, and
the feature itself should be implemented in a more sane way. However,
the solution is not trivial, and people are using DSI PLL to get more
exact pixel clocks, so this hack is an acceptable temporary solution for
the time being.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Taal driver used to take a hard coded Macro for Virtual Channel and the VC_ID.
The Taal panel driver now requests for a Virtual channel through the
omap_dsi_request_vc() call in taal_probe().

The channel number returned by the request_vc() call is used for sending command
and data to the Panel. The DSI driver automatically configures the Virtual
Channel's source to either Video Port or L4 Slave port based on what the panel
driver is using it for.

The driver uses omap_dsi_release_vc() to free the VC specified by the panel.
taal_remove() or when a request_vc() call fails.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Introduce functions which request and release VC's. This will be used in panel
drivers in their probes.

omap_dsi_request_vc() takes in the pointer to the omap_dss_device, the VC_ID
parameter which goes into the header of the DSI packets, and returns a Virtual
channel number (or virtual channel register set) which it can use.

omap_dsi_set_vc_id() takes the omap_dss_device pointer, the Virtual Channel
number and the VC_ID that needs to be set for the specifed Virtual Channel.

omap_dsi_release_vc() takes the omap_dss_device pointer and the Virtual Channel
number that needs to be made free.

Initialisation of VC parameters is done in dsi_init().
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

cpu_is_omapxxx() was used previously to select the supported interfaces.
Now that the interfaces are platform devices, we no longer need to do
the check when registering the driver. Thus we can just remove the
checks.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

DPI and SDI are different from the other interfaces as they are not
hwmods and there is not platform driver for them. They could be said to
be a part of DSS or DISPC modules, although it's not a clear definition.

This patch moves DPI and SDI initialization into DSS platform driver,
making the code more consistent: omap_dss_probe() only initializes
platform drivers now.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

dpi_init() does not use the pdev argument for anything. Remove it.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

FB_OMAP_BOOTLOADER_INIT does not work, and it was only partially
implemented for SDI.

This patch removes support for FB_OMAP_BOOTLOADER_INIT to clean up the
code and to remove any assumptions that FB_OMAP_BOOTLOADER_INIT would
work.

Proper implementation is much more complex, requiring early boot time
register and clock handling to keep the DSS running.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

DSI PLL output clock names have been made more generic. The clock name
describes what the source of the clock and what clock is used for. Some of
DSI PLL parameters like dividers and DSI PLL source have also been made more
generic.

dsi1_pll_fclk and dsi2_pll_fclk have been changed as dsi_pll_hsdiv_dispc_clk
and dsi_pll_hsdiv_dsi_clk respectively. Also, the hsdividers are now named
regm_dispc and regm_dsi instead of regm3 and regm4.

Functions and macros named on the basis of these clock names have also been
made generic.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Clock source names vary across OMAP2/3 and OMAP4, the clock source enum
names have been made generic in the driver, but for purposes of debugging
and dumping clock sources, it is better to preserve the actual TRM name of
the clock.

Introduce a dss feature function 'dss_feat_get_clk_source_name()' which
returns a string with the TRM clock name for the current OMAP in use. The OMAP
specific name is printed along the generic name within brackets.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

The enum members of 'dss_clk_source' have clock source names specific to
OMAP2/3. Change the names to more generic terms such that they now describe
where the clocks come from and what they are used for.

Also, change the enum member names to have "DSS_CLK_SRC" instead of "DSS_SRC"
for more clarity.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

The maximum supported frequency for DSS has increased from 173 to 186 Mhz on
OMAP4.

Introduce a dss feature function to get the max_fck to replace DISPC_MAX_FCK
macro.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Add dss_features and register fields to incorporate changes in DISPC pipelines
between OMAP3 and OMAP4.

Register fields added: FEAT_REG_HORIZONTALACCU, FEAT_REG_VERTICALACCU
DSS Features added: FEAT_LINEBUFFERSPLIT, FEAT_ROWREPEATENABLE, FEAT_RESIZECONF

_dispc_set_scaling() and _dispc_set_rotation_attrs() have been cleaned up.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

There is a linker error from lcd_2430sdp.c if CONFIG_TWL4030_CORE is not
set. This can be triggered on OMAP2 builds when OMAP3 or OMAP4 are not set.

drivers/built-in.o: In function `sdp2430_panel_disable':
drivers/video/omap/lcd_2430sdp.c:123: undefined reference to `twl_i2c_write_u8'
drivers/video/omap/lcd_2430sdp.c:124: undefined reference to `twl_i2c_write_u8'
drivers/built-in.o: In function `sdp2430_panel_enable':
drivers/video/omap/lcd_2430sdp.c:110: undefined reference to `twl_i2c_write_u8'
drivers/video/omap/lcd_2430sdp.c:112: undefined reference to `twl_i2c_write_u8'

Fix this by selecting the TWL4030_CORE for MACH_OMAP_2430SDP when building
with CONFIG_FB_OMAP as there is no own Kconfig entry for lcd_2430 and it is
compiled always when both MACH_OMAP_2430SDP and FB_OMAP are set.
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

hwmod databases provide information about which optional clocks are available
for a given platform. This is available via a function pointer opt_clock_enable
in pdata.

Use this information during get/enable/disable/put of clocks.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Provide a function in pdata to allow dss submodules to check if a given
clock is available on a platform as an optional clock.
Signed-off-by: Senthilvadivu Guruswamy <svadivu@ti.com>
(based on implementation from Senthil)
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

dsi_reset_tx_fifo() was not used. Furthermore, OMAP errata states that
TX FIFO flush is not functional, so the function wouldn't even have
worked.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

There was an unused list defined in display.c. Remove it.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

CONFIG_FB_OMAP_LCD_VGA option is present in drivers/video/omap
There is no explaination about what this flag does.
Lets add information about it.

FB_OMAP_LCD_VGA flag sets resolution of display to VGA (640 X 480).
The default resolution of 3430 LDP is 320 X 240.
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Only OMAP 3430 hardware has SDI support. The availability of SDI HW can
be found out by checking if the LCD channel supports SDI displays.

This patch checks for SDI HW support before accessing SDI registers,
which fixes a crash on OMAP4 when SDI SW support is compiled in.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

OMAP2 doesn't support SDI or DSI. Remove them from
omap2_dss_supported_displays.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

OMAP 3630 does not support SDI. Split omap3_dss_supported_displays into
3430 and 3630 entries, and remove the SDI from 3630 entry.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Support for the display interface was checked in a separate switch-case.
There's no reason for that, and this patch handles the fail code path in
the same switch-case where the display initialization is done.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Enabling all the display interface options to be built as module
And enabling all the display panels to be built as modules.
Signed-off-by: Samreen <samreen@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Currently, the core DSS platform device requests for an irq line for OMAP2 and
OMAP3. Make DISPC and DSI platform devices request for a shared IRQ line.

On OMAP3, the logical OR of DSI and DISPC interrupt lines goes to the MPU. There
is a register DSS_IRQSTATUS which tells if the interrupt came from DISPC or DSI.

On OMAP2, there is no DSI, only DISPC interrupts goto the MPU. There is no
DSS_IRQSTATUS register.

Hence, it makes more sense to have separate irq handlers corresponding to the
DSS sub modules instead of having a common handler.

Since on OMAP3 the logical OR of the lines goes to MPU, the irq line is shared
among the IRQ handlers.

The hwmod irq info has been removed for DSS to DISPC and DSI for OMAP2 and OMAP3
hwmod databases. The Probes of DISPC and DSI now request for irq handlers.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

When omapfb.mode is passed through bootargs, when omapfb is setting mode,
it would check if timings passed are fine for panel attached to it.
It makes use of check_timing API provided by the panel.

In current code if check_timing API is not available for attached panel,
OMAPFB would return -EINVAL and BPP sent via bootargs will not have any effect.

In case of panels like TAAL panel, omapfb or any other driver should not be allowed to
change the timings. So bpps sent via bootargs will not have an effect.

In such case we can check only the x_res and y_res with the panels resolution
and if they match go ahead and set the bpps.
The bpp value sent via bootarg would have an effect.
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Add support for Samsung LTE430WQ-F0C to panel-generic-dpi.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

DSS submodules DPI/SDI/DSI/VENC require a regulator to function.
However, if the board doesn't use, say, SDI, the board shouldn't need to
configure vdds_sdi regulator required by the SDI module.

Currently the regulators are acquired when the DSS driver is loaded.
This means that if the kernel is configured with SDI, vdds_sdi regulator
is needed for all boards.

This patch changes the DSS driver to acquire the regulators only when a
display of particular type is initialized. For example, vdds_sdi is
acquired when sdi_init_display() is called.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

MODULE_PARM_DESC() takes the name of the actual module parameter, not the
name of the variable, as input. Fix the module parameter description for
def_disp.
Signed-off-by: Jani Nikula <jani@nikula.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Add hwmod device names for OMAP4; this enables device build for omap4 dss
hwmod IPs.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Enable DSS2 and OMAPFB for OMAP4 in Kconfig
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

DSS code uses ick as one of the clocks in clk_get/clk_put. OMAP4 clock database
doesn't have ick for DSS, so adding ick as dummy clock.

This is needed for backward compatibility with OMAP2/3.

Once pm_runtime* APIs get introduced in DSS, this will be revisited.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

The dss struct in dss.c has omap2/3 specific clock names. Making them generic,
to increase readability and extendability.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

enum dss_clock structure is replaced with generic names that
could be used across OMAP2420, 2430, 3xxx, 44xx platforms.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Currently, clock database has <dev, clock-name> tuples for DSS2. Because of
this, the clock names are different across different OMAP platforms.

This patch aligns the DSS2 clock names and roles across OMAP 2420, 2430, 3xxx,
44xx platforms in the clock databases, hwmod databases for opt-clocks, and DSS
clock handling.

This ensures that clk_get/put/enable/disable APIs in DSS can use uniform role
names.
Signed-off-by: Sumit Semwal <sumit.semwal@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>