The video sprites support various video surface formats natively and can
handle scaling as well.  So add support for them using the new DRM core
sprite support functions.

v2: use drm specific fourcc header and defines
v3: address Daniel's comments:
  - don't take struct mutex around register access (only needed for
    regs in the GT power well)
  - don't hold struct mutex across vblank waits
  - fix up update_plane API (pass obj instead of GTT offset)
  - add interlaced defines for sprite regs
  - drop unnecessary 'reg' variables
  - comment double buffered reg flushing
  Also fix w/h confusion when writing the scaling reg.
v4: more fixes, address more comments from Daniel, and include Hai's fix
  - prevent divide by zero in scaling calculation (Hai Lan)
  - update to Ville's new DRM_FORMAT_* types
  - fix sprite watermark handling (calc based on CRTC size, separate
    from normal display wm)
  - remove private refcounts now that the fb cleanups handles things
v5: add linear surface support
v6: remove color key clearing & setting from update_plane

For this version, I tested DPMS since it came up in the last review;
DPMS off/on works ok when a video player is working under X, but for
power saving we'll probably want to do something smarter.  I'll leave
that for a separate patch on top.  Likewise with the refcounting/fb
layer handling, which are really separate cleanups.
Reviewed-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NKeith Packard <keithp@keithp.com>

We learned that the ECOBUS register was inside the GT power well, and
so *did* need force wake to be read, so it gets removed from the list
of 'doesn't need force wake' registers.

That means the code reading ECOBUS after forcing the mt_force_wake
function to be called needs to use I915_READ_NOTRACE; it doesn't need
to do more force wake fun as it's already done it manually.

This also adds a comment explaining why the MT forcewake testing code
only needs to call mt_forcewake_get/put and not disable RC6 manually
-- the ECOBUS read will return 0 if the device is in RC6 and isn't
using MT forcewake, causing the test to work correctly.
Signed-off-by: NKeith Packard <keithp@keithp.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>

This matches the modern specs more accurately.

This will be used by the following patch to fix the way we display RC
status.
Signed-off-by: NBen Widawsky <ben@bwidawsk.net>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Otherwise each driver would need to keep the information inside
their own framebuffer object structure. Also add offsets[]. BOs
on the other hand are driver specific, so those can be kept in
driver specific structures.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

My EFI BIOS starts the graphics card up in my projector's preferred EDID
mode, 1080@60i. The Intel driver does not clear all the interlaced bits.

This patch introduces a new PIPECONF_INTERLACE_MASK define and uses it
to restore progressive mode.
Signed-of-by: NChristian Schmidt <schmidt@digadd.de>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NDave Airlie <airlied@redhat.com>

The ELD may or may not change when switching the video mode.
If unchanged, don't trigger hot plug events to HDMI audio driver.

This avoids disturbing the user with repeated printks.
Reported-by: NNick Bowler <nbowler@elliptictech.com>
Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Change the definitions from GEN5 to IBX as they aren't in the CPU and
some SNB systems actually shipped with IBX chipsets (or, at least that's
a supported configuration).

The GEN7_* register addresses actually take effect since GEN6 and should
be prefixed by CPT, the PCH code name.
Suggested-by: NKeith Packard <keithp@keithp.com>
Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

SandyBridge should be using the same register addresses as IvyBridge.
Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Some active adaptors (VGA usually) only have two lanes at 2.7GHz.
That's a maximum pixel clock of 144MHz at 8bpc, but 192MHz at 6bpc.

Fixes Asus UX31 panel being black at startup due to no valid modes since
dc22ee6f.

v2: Rebased to current code, resulting in the fix applying to EDP panels as
    well.  Also changed from spatio-temporal to just spatial dithering on
    pre-ironlake, to be conssitent (and less visual flicker)
Signed-off-by: NAdam Jackson <ajax@redhat.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Tested-by: NEric Anholt <eric@anholt.net>
Tested-by: NDirk Hohndel <hohndel@infradead.org>
Signed-off-by: NKeith Packard <keithp@keithp.com>

This fixes a race where we may try to finish a page flip and decrement
the refcount even if our vblank_get failed and we ended up with a
spurious flip pending interrupt.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=34211.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NKeith Packard <keithp@keithp.com>

RC6 should always work on IVB, and should work on SNB whenever IO
remapping is disabled. RC6 never works on Ironlake. Make the default
value for the parameter follow these guidelines. Setting the value
to either 0 or 1 will force the specified behavior.
Signed-off-by: NKeith Packard <keithp@keithp.com>
Reviewed-by: NKenneth Graunke <kenneth@whitecape.org>
Reviewed-by: NEugeni Dodonov <eugeni.dodonov@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38567
Cc: Ted Phelps <phelps@gnusto.com>
Cc: Peter <pab1612@gmail.com>
Cc: Lukas Hejtmanek <xhejtman@fi.muni.cz>
Cc: Andrew Lutomirski <luto@mit.edu>

Name the formats as DRM_FORMAT_X instead of DRM_FOURCC_X. Use consistent
names, especially for the RGB formats. Component order and byte order are
now strictly specified for each format.

The RGB format naming follows a convention where the components names
and sizes are listed from left to right, matching the order within a
single pixel from most significant bit to least significant bit.

The YUV format names vary more. For the 4:2:2 packed formats and 2
plane formats use the fourcc. For the three plane formats the
name includes the plane order and subsampling information using the
standard subsampling notation. Some of those also happen to match
the official fourcc definition.

The fourccs for for all the RGB formats and some of the YUV formats
I invented myself. The idea was that looking at just the fourcc you
get some idea what the format is about without having to decode it
using some external reference.
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

On IVB C0+ with newer BIOSes, the forcewake handshake has changed.  There's
now a bitfield for different driver components to keep the GT powered
on.  On Linux, we centralize forcewake handling in one place, so we
still just need a single bit, but we need to use the new registers if MT
forcewake is enabled.

This needs testing on affected machines.  Please reply with your
tested-by if you had problems after a BIOS upgrade and this patch fixes
them.

v2: force MT mode. shift by 16
v3: set MT force wake bits then check ECOBUS

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=42923Tested-by: NManoj Iyer <manoj.iyer@canonical.com>
Tested-by: NRobert Hooker <robert.hooker@canonical.com>
Tested-by: NKeith Packard <keithp@keithp.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NKeith Packard <keithp@keithp.com>

PCH eDP has many of the same needs as regular PCH DP connections,
including the DP_CTl bit settings, the TRANS_DP_CTL register.
Signed-off-by: NKeith Packard <keithp@keithp.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>

To properly support the various plane formats supported by different
hardware, the kernel must know the pixel format of a framebuffer object.
So add a new ioctl taking a format argument corresponding to a fourcc
name from the new drm_fourcc.h header file.  Implement the fb creation
hooks in terms of the new mode_fb_cmd2 using helpers where the old
bpp/depth values are needed.

v2: create DRM specific fourcc header file for sharing with libdrm etc
v3: fix rebase failure and use DRM fourcc codes in intel_display.c and
    update commit message
v4: make fb_cmd2 handle field into an array for multi-object formats
    pull in Ville's fix for the memcpy in drm_plane_init
    apply Ville's cleanup to zero out fb_cmd2 arg in drm_mode_addfb
v5: add 'flags' field for interlaced support (from Ville)
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: NAlan Cox <alan@lxorguk.ukuu.org.uk>
Reviewed-by: NRob Clark <rob.clark@linaro.org>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NDave Airlie <airlied@redhat.com>

Unlike the previous one, I don't have known testcases it fixes.  I'd
rather not go through the same debug cycle on whatever testcases those
might be.
Signed-off-by: NEric Anholt <eric@anholt.net>
Cc: stable@kernel.org
Signed-off-by: NKeith Packard <keithp@keithp.com>

Fixes rendering failures in Unigine Tropics and Sanctuary and the mesa
"fire" demo.
Signed-off-by: NEric Anholt <eric@anholt.net>
Cc: stable@kernel.org
Signed-off-by: NKeith Packard <keithp@keithp.com>

Shouldn't hide these behind _DRIVER, they're all KMS-related.
Signed-off-by: NAdam Jackson <ajax@redhat.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

<ajax> i'm getting tempted to just disable temporal
<mjg59> Approved.
<ajax> apparently it makes the screen look pulse-y which is worse
than the disease.

References: http://lists.freedesktop.org/archives/intel-gfx/2011-October/012545.htmlTested-by: NОлег Герман <oleg.german@gmail.com>
Reviewed-by: NAdam Jackson <ajax@redhat.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Belongs in PCH enable instead.  The duplication is worrying and the
specs explicitly list transcoder select *after* actual PLL enable, which
doesn't occur until later.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Just some extra debug output.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

The watermark reg for the third pipe is in an unusual offset; add
support for it and set watermarks for 3 pipe configs.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

At the point where we check, we can't do much about the failure, but it
can aid debugging.  Note that the auto-train override bit will be reset
as part of normal mode setting with this patch if a pipe ever does get
stuck, but that's consistent with the workaround for CPT provided by the
hardware team.  This patch helped catch the fact that the pipe wasn't
running in the !composite sync FDI case on my IVB SDV, so has already
shown to be useful.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Transcoder A will always use PLL A and transcoder B will use PLL B.  But
transcoder C could use either, so always mask the select bits off before
or'ing in a new value.
Reported-by: NAdam Jackson <ajax@redhat.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

The cursor regs have moved around, add the offsets and new macros for
getting at them.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

We can have more than just A and B these days.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Add two new fields to the intel_crtc struct for 3 pipe support: no_pll
and use_pll_a.  The no_pll field is only set on the 3rd pipe to indicate
that it doesn't have a PLL of its own and so shouldn't try to write the
main PLL regs.  The use_pll_a field controls which PLL pipe 3 will
share, A or B.  The core code will try to share PLLs with whichever pipe
has the same timings, rejecting the mode set if none is found.  This
means that pipe 3 must always be set after one of the other pipes has
been configured with real PLL settings.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Add a couple of checks now that we're using the 3rd transcoder:
  1) make sure the transcoder PLL enable bit is set for the transcoder
     in question
  2) when checking actual PLL enable, use the selected PLL number rather
     than the transcoder number (they could be different now)
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Just a cleanup to make the mode_set function more manageable.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Well almost anyway.  IVB has 3 planes, pipes, transcoders, and FDI
interfaces, but only 2 pipe PLLs.  So two of the pipes must use the same
pipe timings (e.g. 2 DP plus one other, or two HDMI with the same mode
and one other, etc.).
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Add a macro for accessing the two pipe PLLs and add a check to make sure
we don't access a non-existent one in the enable/disable functions.
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

It's needed for 3 pipe support as well as just regular functionality
(e.g. DisplayPort).
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: NAdam Jackson <ajax@redhat.com>
Tested-by: NEugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

The rps disabling code wasn't properly cancelling outstanding work
items. Also add a comment that explains why we're not racing with
the work item that could unmask interrupts - that piece of code
confused me quite a bit.

v2: Ben Widawsky pointed out that the first patch would deadlock
(and a few lesser problems). All corrected.
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: NBen Widawsky <ben@bwidawsk.net>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NKeith Packard <keithp@keithp.com>

The reference clock configuration must be done before any mode setting
can occur as all outputs must be disabled to change
anything. Initialize the clocks after turning everything off during
the initialization process.

Also, re-initialize the refclk at resume time.
Signed-off-by: NKeith Packard <keithp@keithp.com>

I can't find any reference clocks which run at 96MHz as seems to be
indicated from the comments in this code.
Signed-off-by: NKeith Packard <keithp@keithp.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

When trying to use SSC on Ibex Peak without CK505, any non-SSC outputs
(like VGA or TV) get broken. So, do not use SSC on Ibex Peak unless
there is a CK505 available (as specified by the VBT).

On Cougar Point, all clocking is internal, so SSC can always be used,
and there will never be a CK505 available.

This eliminates VGA shimmer on some Ironlake machines which have a
CK505 clock source.

References: https://bugzilla.kernel.org/show_bug.cgi?id=21742
References: https://bugs.freedesktop.org/show_bug.cgi?id=38750Signed-off-by: NKeith Packard <keithp@keithp.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

The PCH refclk settings are global, so we need to look at all of the
encoders, not just the current encoder when deciding how to configure
it. Also, handle systems with more than one panel (any combination of
PCH/non-PCH eDP and LVDS).

Disable SSC clocks when no panels are connected.
Signed-off-by: NKeith Packard <keithp@keithp.com>

Allow SSC to be enabled even when the BIOS disables it for testing SSC paths.
Signed-off-by: NKeith Packard <keithp@keithp.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>

Make the default FBC behaviour chipset specific, allowing us to turn
it on by default for Ironlake and older where it has been seen to
cause trouble with screen updates.
Signed-off-by: NKeith Packard <keithp@keithp.com>
Tested-by: NFrancis Moreau <francis.moro@gmail.com>

Add ELD support for Intel Eaglelake, IbexPeak/Ironlake,
SandyBridge/CougarPoint and IvyBridge/PantherPoint chips.

ELD (EDID-Like Data) describes to the HDMI/DP audio driver the audio
capabilities of the plugged monitor. It's built and passed to audio
driver in 2 steps:

(1) at get_modes time, parse EDID and save ELD to drm_connector.eld[]

(2) at mode_set time, write drm_connector.eld[] to the Transcoder's hw
    ELD buffer and set the ELD_valid bit to inform HDMI/DP audio driver

This patch is tested OK on G45/HDMI, IbexPeak/HDMI and IvyBridge/HDMI+DP.
Test scheme: plug in the HDMI/DP monitor, and run

        cat /proc/asound/card0/eld*

to check if the monitor name, HDMI/DP type, etc. show up correctly.

Minor imperfection: the GEN5_AUD_CNTL_ST/DIP_Port_Select field always
reads 0 (reserved). Without knowing the port number, I worked it around
by setting the ELD_valid bit for ALL the three ports. It's tested to not
be a problem, because the audio driver will find invalid ELD data and
hence rightfully abort, even when it sees the ELD_valid indicator.

Thanks to Zhenyu and Pierre-Louis for a lot of valuable help and testing.

CC: Zhao Yakui <yakui.zhao@intel.com>
CC: Wang Zhenyu <zhenyu.z.wang@intel.com>
CC: Jeremy Bush <contractfrombelow@gmail.com>
CC: Christopher White <c.white@pulseforce.com>
CC: Pierre-Louis Bossart <pierre-louis.bossart@intel.com>
CC: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>