The support outputs struct for overlay managers is incorrect for OMAP4. Make
these changes:

- DPI isn't supported via the LCD1 overlay manager, remove DPI as a supported
  output.
- the TV manager can suppport DPI, but the omapdss driver doesn't support that
  yet, we require some muxing at the DSS level, and we also need to configure
  the hdmi pll in the DPI driver so that the TV manager has a pixel clock. We
  don't support that yet.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

commit 195e672a
   OMAPDSS: DPI: Remove cpu_is_xxxx checks

made the mistake of assuming that cpu_is_omap34xx() is exclusive of
other cpu_is_* predicates whereas it includes cpu_is_omap3630().

So on an omap3630, code that was previously enabled by
  if (cpu_is_omap34xx())
is now disabled as
  dss_has_feature(FEAT_DPI_USES_VDDS_DSI)
fails.

So add FEAT_DPI_USES_VDDS_DSI to omap3630_dss_feat_list.

Cc: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Export dss_features related functions.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The overlay manager width and height vary in OMAP5 from previous OMAPs
in terms of maximum limit and register field positions. Add parameters
in dispc_features for these. Also remove params related to manager width
and height from dss_features, as we want to maintain a feature list for
individual IPs.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

It could be possible that the DMA port differs accross diferent HDMI IPs. Thus,
add an IP-specific function to obtain the address offset and size of the DMA
data port.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

cpu_is_* calls are no longer used in omapdss, so the includes for
<plat/cpu.h> can be removed.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Use omapdss_version in hdmi.c to select the proper hdmi features.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Pass the omapdss_version to dss_features.c and use it to select the
proper dss features.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Since writeback has many overlay like properties, and most of it's registers are
similar to that of overlays, it's possible to reuse most of the overlay related
DISPC code for writeback when considering it as a plane. Writeback was added as
a plane in the omap_plane field as OMAP_DSS_WB.

Add the writeback register offsets in dispc.h, add minimal WB plane related info
needed in dss_features. Add a function which returns the number of writeback
pipelines an OMAP version has.
Signed-off-by: NArchit Taneja <archit@ti.com>

Add position and replication as overlay caps, and pass overlay caps as an
argument to the corresponding functions. Adding position and replication to
overlay caps seems a bit unnecessary, but it allows us to use the
corresponding functions for writeback too.

These caps will be set for all overlays, but not for writeback. This is done
so writeback can reuse dispc_ovl_setup() to the maximum.
Signed-off-by: NArchit Taneja <archit@ti.com>

Add set_output/unset_output ops for overlay managers, these form links between
managers and outputs. Create a function in dss features which tell all the
output instances that connect to a manager, use it when a manager tries to set
an output. Add a constraint of not unsetting an output when the manager is
enabled.

Keep the omap_dss_device pointer and set/unset_device ops in overlay_manager for
now to not break things. Keep the dss feature function get_supported_displays
as it's used in some places. These will be removed later.
Signed-off-by: NArchit Taneja <archit@ti.com>

On our AM3505 based board, dpi.c complains that there is no VDDS_DSI
regulator and the framebuffer cannot be enabled. However, this check
does not seem to apply to AM3505/17 chips.

This patch adds new features list for AM35xxx, which is the same as for
OMAP3 except the VDDS_DSI is removed.
Signed-off-by: NRaphael Assenat <raph@8d.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

OMAP5 DSI PHY has DCC (Duty Cycle Corrector) block, and by default DCC
is enabled and thus the PLL clock is divided by 2 to get the DSI DDR
clk. This divider has been 4 for all previous OMAPs, and changing it
needs some reorganization of the code. The DCC can be disabled, and in
that case the divider is back to the old 4.

This patch adds dss feature for the DCC, and adds code to always disable
the DCC.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add FEAT_DSI_PLL_REFSEL. OMAP5's DSI PLL needs configuration to select
the reference clock to be used. We always use SYSCLK.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add FEAT_DSI_PLL_SELFREQDCO. OMAP5's DSI PLL has a new configuration
option that needs to be programmed depending on the PLL's output clock
frequency.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add basic omap5 features for dss and dispc.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add max value of DSI functional clock to dss_features, so that DSI
driver can use it.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The OMAP3 checks have been removed and replaced by a dss feature
FEAT_DPI_USES_VDDS_DSI for cleaner implementation. The patches
"OMAP: DSS2: enable VDDS_DSI when using DPI" (8a2cfea8) by Tomi Valkeinen
<tomi.valkeinen@nokia.com> and "ARM: omap: fix oops in
drivers/video/omap2/dss/dpi.c" (40410715) by Russell King
<rmk+kernel@arm.linux.org.uk> had introduced these checks. As it is evident
from these patches a dependency exists for some DSS pins on VDDS_DSI which is
better shown by dss feature FEAT_DPI_USES_VDDS_DSI.
Signed-off-by: NChandrabhanu Mahapatra <cmahapatra@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

TILER is a block in OMAP4's DMM which lets DSS fetch frames in a rotated manner.
Physical memory can be mapped to a portion of OMAP's system address space called
TILER address space. The TILER address space is split into 8 views. Each view
represents a rotated or mirrored form of the mapped physical memory. When a
DISPC overlay's base address is programmed to one of these views, the TILER
fetches the pixels according to the orientation of the view. A view is further
split into 4 containers, each container holds elements of a particular size.
Rotation can be achieved at the granularity of elements in the container. For
more information on TILER, refer to the Memory Subsytem section in OMAP4 TRM.
Rotation type TILER has been added which is used to exploit the capabilities of
these 8 views for performing various rotations.

When fetching from addresses mapped to TILER space, the DISPC DMA can fetch
pixels in either 1D or 2D bursts. The fetch depends on which TILER container we
are accessing. Accessing 8, 16 and 32 bit sized containers requires 2D bursts,
and page mode sized containers require 1D bursts.

The DSS2 user is expected to provide the Tiler address of the view that it is
interested in. This is passed to the paddr and p_uv_addr parameters in
omap_overlay_info. It is also expected to provide the stride value based on the
view's orientation and container type, this should be passed to the screen_width
parameter of omap_overlay_info. In calc_tiler_rotation_offset screen_width is
used to calculate the required row_inc for DISPC. x_predecim and y_predecim are
also used to calculate row_inc and pix_inc thereby adding predecimation support
for TILER.
Signed-off-by: NChandrabhanu Mahapatra <cmahapatra@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The generic HDMI driver does not need to know about the specific
settings of a given IP. Hence, it just passes the audio configuration
and the IP library parses such configuration and sets the IP
accordingly. This patch introduces an IP-specific audio configuration
function.

Also, this patch implements the audio config function for OMAP4. The
DMA, format and core config functions are no longer exposed to the
generic HDMI driver as they are IP-specific.

The audio configuration function caters for 16-bit through 24-bit
audio samples with sample rates from 32kHz and up to 192kHz as well
as up to 8 audio channels.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>

Instead of having OMAPDSS HDMI audio functionality depending on the
ASoC HDMI audio driver, use a new config option so that
potential users, including ASoC, may select if needed.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>

Decouple the enable/disable operation of the HDMI audio wrapper from
audio start/stop. Otherwise, an audio FIFO underflow may occur. The
audio wrapper enablement must be done after configuration and
before audio playback is started.
Signed-off-by: NAxel Castaneda Gonzalez <x0055901@ti.com>
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>

To improve readability, split the video_enable HDMI IP operation
into two separate functions for enabling and disabling video.
The video_enable function is also modified to return an error value.

While there, update these operations for the OMAP4 IP accordingly.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>

To improve readability, split the audio_enable HDMI IP operation
into two separate functions for enabling and disabling audio.
The audio_enable function is also modified to return an error value.

While there, update these operations for the OMAP4 IP accordingly.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>

Clean up the DISPC manager timings related function by:

- Create a common function to set size for LCD and TV.
- Create a common function to check timings for LCD and TV.
- Add dss params to get the range of manager size.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add missing but supported color formats for GFX pipeline in dss features:
RGBX16-4444, RGBA16-4444 and XRGB16-1555.

In dispc_ovl_set_color_mode():

- Remove unsupported modes on GFX pipeline: YUV2 and UYVY. Replace these by
  missing modes supported by GFX pipelines: RGBX16-4444 and RGBA16-4444.

- Fix swapped modes on VID pipelines: RGBX16-4444 and XRGB16-4444.
Signed-off-by: NLajos Molnar <lajos@ti.com>
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Certain OMAP4 revisions (i.e., 4430 ES2.3, 4460, and 4470) use
a pseudo clock (generated from the TMDS clock), MCLK, to drive the
generation of Audio Clock Regeneration packets. Other devices
(i.e., 4430 ES2.[0,2]) use the TMDS clock directly.

This patch adds a new DSS feature for MCLK support. It also rearranges
the omap_dss_features structures to reflect the devices supporting it.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The number of dss_feat_id members has increased to a large value, the current
way of assigning a subset of these features (for a particular OMAP) as a mask
is no longer feasible.

Maintain the subset of features supported as lists. Make the function
dss_has_feature() traverse through this list.
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Take fifo merge into use by implementing a rather naive fifo merge
threshold calculation: keep the low threshold always the same, but
increase the high threshold when fifo merge is used.

This should greatly increase the time between pixel data fetches from
SDRAM, as the usable fifo size is much larger. However, it probably
won't help for fifo underflows, as the low threshols is kept the same.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add feature flag for fifo merge. OMAP2 doesn't contain fifo merge, later
OMAPs do.

dispc_enable_fifomerge() checks for the flag when called, and gives a
WARN if fifo merge is being enabled when it is not supported.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

In order to separate clearly IP-specific code from general DSS code,
a function for OMAP4 audio enable is created. This function is
included in the HDMI IP ops to align with the current implementation
of the DSS HDMI driver. This function is to be used by the ASoC
HDMI audio codec.
Signed-off-by: NRicardo Neri <ricardo.neri@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Clock requirements for scaling in OMAP2, OMAP3 and OMAP4 are different. In
OMAP2 and OMAP3 the required clock rate is a function of pixel clock, vertical
downscale ratio and horizontal downscale ratio whereas in OMAP4 it is a
function of pixel clock and horizontal downscale ratio only. Selection of 3-tap
vs 5-tap coefficients depends on clock rate line buffer width in OMAP3 whereas
in OMAP4 it is independent of clock rate and line buffer width. In OMAP2 3-tap
for vertical and 5-tap for horizontal scaling is used. In OMAP4 5-tap is used
both for horizontal and vertical scaling for better performance. Also, the
number and width of line buffers differs in OMAP3 and OMAP4.

So, clock functions have been fined tuned for OMAP3 and support has been added
added for OMAP4. This code has been tested on OMAP2, OMAP3 and OMAP4, and
scaling issues due to clock errors have been resolved.
Signed-off-by: NChandrabhanu Mahapatra <cmahapatra@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add support for VIDEO3 pipeline on OMAP4:
- Add VIDEO3 pipeline information in dss_features and omapdss.h
- Add VIDEO3 pipeline register coefficients in dispc.h
- Create a new overlay structure corresponding to VIDEO3.
- Make changes in dispc.c for VIDEO3
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

On OMAP3, in order to enable alpha blending for LCD and TV managers, we needed
to set LCDALPHABLENDERENABLE/TVALPHABLENDERENABLE bits in DISPC_CONFIG. On
OMAP4, alpha blending is always enabled by default, if the above bits are set,
we switch to an OMAP3 compatibility mode where the zorder values in the pipeline
attribute registers are ignored and a fixed priority is configured.

Rename the manager_info member "alpha_enabled" to "partial_alpha_enabled" for
more clarity. Introduce two dss_features FEAT_ALPHA_FIXED_ZORDER and
FEAT_ALPHA_FREE_ZORDER which represent OMAP3-alpha compatibility mode and OMAP4
alpha mode respectively. Introduce an overlay cap for ZORDER. The DSS2 user is
expected to check for the ZORDER cap, if an overlay doesn't have this cap, the
user is expected to set the parameter partial_alpha_enabled. If the overlay has
ZORDER cap, the DSS2 user can assume that alpha blending is already enabled.

Don't support OMAP3 compatibility mode for now. Trying to read/write to
alpha_blending_enabled sysfs attribute issues a warning for OMAP4 and does not
set the LCDALPHABLENDERENABLE/TVALPHABLENDERENABLE bits.

Change alpha_enabled to partial_alpha_enabled in the omap_vout driver. Use
overlay cap "OMAP_DSS_OVL_CAP_GLOBAL_ALPHA" to check if overlay supports alpha
blending or not. Replace this with checks for VIDEO1 pipeline.

Cc: linux-media@vger.kernel.org
Cc: Lajos Molnar <molnar@ti.com>
Signed-off-by: NArchit Taneja <archit@ti.com>
Acked-by: NVaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add support to dump the HDMI wrapper, core, PLL and PHY registers
through debugfs.
Signed-off-by: NMythri P K <mythripk@ti.com>
[tomi.valkeinen@ti.com: updated the description]
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Create a dss_range_param member called FEAT_PARAM_DOWNSCALE to get the maximum
downscaling possible on the current platform. Use this in
dispc_ovl_calc_scaling().
Signed-off-by: NArchit Taneja <archit@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Implement detect() by checking the hot plug detect status.

The implementation is not very good, as it always turns on the HDMI
output to get the detection working. HDMI driver needs improvements so
that we could enable only core parts of it.

Cc: Mythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

The current driver had a hardcoded minimum value of 2 for pixel clock
divisor (PCD). This doesn't seem to be right.

OMAP4 TRM says that PCD can be 1 when not downscaling, and inverted
pixel clock (IPC) is off.

OMAP3 TRM says the same, but also in the register descriptions that PCD
value 1 is invalid.

OMAP2 TRM says PCD 2 is the minimum.

OMAP2 is still untested, but for both OMAP3 and OMAP4 PCD of 1 seems to
work fine.

This patch adds a new DSS feature, FEAT_PARAM_DSS_PCD, which is used to
find the minimum and maximum PCD. The minimum is set to 2 for OMAP2, and
1 for OMAP3/4.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

HDMI IP fundamentally has replaceable core PHY and PLL blocks.
These blocks might vary across OMAP's but the end functionality such as to
enable or disable PLL, PHY, function to read EDID would remain the same.

Thus to make the current hdmi DSS driver compatible with different OMAP's having
different IP blocks( A combination of different core, PHY, PLL blocks), function
pointer approach is introduced.

With function pointer, relevant IP dependent functions are mapped to the generic
functions used by DSS during the initialization based on the OMAP compiled.
Thus making hdmi DSS driver IP agnostic.
Signed-off-by: NMythri P K <mythripk@ti.com>
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>

Add OMAP_DSS_OVL_CAP_GLOBAL_ALPHA and OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA to
overlay capabilities. Use these instead of FEAT_GLOBAL_ALPHA,
FEAT_GLOBAL_ALPHA_VID1 and FEAT_PRE_MULT_ALPHA in code.

Remove FEAT_GLOBAL_ALPHA_VID1 and FEAT_PRE_MULT_ALPHA which are no
longer used. FEAT_GLOBAL_ALPHA is still used to decide if the HW has
global alpha register.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: NArchit Taneja <archit@ti.com>