Commit Graph

211 Commits

Author SHA1 Message Date
Rodrigo Vivi 176d5325d1 Merge airlied/drm-next into drm-intel-next-queued
Catchup with upstream.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2017-11-14 07:43:00 -08:00
Dave Airlie 36a5fdf76d This time really the last i915 batch for v4.15:
- PSR state tracking in crtc state (Ville)
 - Fix eviction when the GGTT is idle but full (Chris)
 - BDW DP aux channel timeout fix (James)
 - LSPCON detection fixes (Shashank)
 - Use for_each_pipe to iterate over pipes (Mika Kahola)
 - Replace *_reference/unreference() or *_ref/unref with _get/put() (Harsha)
 - Refactoring and preparation for DDI encoder type cleanup (Ville)
 - Broadwell DDI FDI buf translation fix (Chris)
 - Read CSB and CSB write pointer from HWSP in GVT-g VM if available (Weinan)
 - GuC/HuC firmware loader refactoring (Michal)
 - Make shrinking more effective and not stall so much (Chris)
 - Cannonlake PLL fixes (Rodrigo)
 - DP MST connector error propagation fixes (James)
 - Convert timers to use timer_setup (Kees Cook)
 - Skylake plane enable/disable unification (Juha-Pekka)
 - Fix to actually free driver internal objects when requested (Chris)
 - DDI buf trans refactoring (Ville)
 - Skip waking the device to service pwrite (Chris)
 - Improve DSI VBT backlight parsing abstraction (Madhav)
 - Cannonlake VBT DDC pin mapping fix (Rodrigo)
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Merge tag 'drm-intel-next-2017-10-23' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

This time really the last i915 batch for v4.15:

- PSR state tracking in crtc state (Ville)
- Fix eviction when the GGTT is idle but full (Chris)
- BDW DP aux channel timeout fix (James)
- LSPCON detection fixes (Shashank)
- Use for_each_pipe to iterate over pipes (Mika Kahola)
- Replace *_reference/unreference() or *_ref/unref with _get/put() (Harsha)
- Refactoring and preparation for DDI encoder type cleanup (Ville)
- Broadwell DDI FDI buf translation fix (Chris)
- Read CSB and CSB write pointer from HWSP in GVT-g VM if available (Weinan)
- GuC/HuC firmware loader refactoring (Michal)
- Make shrinking more effective and not stall so much (Chris)
- Cannonlake PLL fixes (Rodrigo)
- DP MST connector error propagation fixes (James)
- Convert timers to use timer_setup (Kees Cook)
- Skylake plane enable/disable unification (Juha-Pekka)
- Fix to actually free driver internal objects when requested (Chris)
- DDI buf trans refactoring (Ville)
- Skip waking the device to service pwrite (Chris)
- Improve DSI VBT backlight parsing abstraction (Madhav)
- Cannonlake VBT DDC pin mapping fix (Rodrigo)

* tag 'drm-intel-next-2017-10-23' of git://anongit.freedesktop.org/drm/drm-intel: (87 commits)
  drm/i915: Update DRIVER_DATE to 20171023
  drm/i915/cnl: Map VBT DDC Pin to BSpec DDC Pin.
  drm/i915: Let's use more enum intel_dpll_id pll_id.
  drm/i915: Use existing DSI backlight ports info
  drm/i915: Parse DSI backlight/cabc ports.
  drm/i915: Skip waking the device to service pwrite
  drm/i915/crt: split compute_config hook by platforms
  drm/i915: remove g4x lowfreq_avail and has_pipe_cxsr
  drm/i915: Drop the redundant hdmi prefix/suffix from a lot of variables
  drm/i915: Unify error handling for missing DDI buf trans tables
  drm/i915: Centralize the SKL DDI A/E vs. B/C/D buf trans handling
  drm/i915: Kill off the BXT buf_trans default_index
  drm/i915: Pass encoder type to cnl_ddi_vswing_sequence() explicitly
  drm/i915: Integrate BXT into intel_ddi_dp_voltage_max()
  drm/i915: Pass the level to intel_prepare_hdmi_ddi_buffers()
  drm/i915: Pass the encoder type explicitly to skl_set_iboost()
  drm/i915: Extract intel_ddi_get_buf_trans_hdmi()
  drm/i915: Relocate intel_ddi_get_buf_trans_*() functions
  drm/i915: Flush the idle-worker for debugfs/i915_drop_caches
  drm/i915: adjust get_crtc_fence_y_offset() to use base.y instead of crtc.y
  ...
2017-11-04 05:43:44 +10:00
Dave Airlie 7a88cbd8d6 Linux 4.14-rc7
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Backmerge tag 'v4.14-rc7' into drm-next

Linux 4.14-rc7

Requested by Ben Skeggs for nouveau to avoid major conflicts,
and things were getting a bit conflicty already, esp around amdgpu
reverts.
2017-11-02 12:40:41 +10:00
Ville Syrjälä d6038611aa drm/i915: Parse max HDMI TMDS clock from VBT
Starting from version 204 VBT can specify the max TMDS clock we are
allowed to use with HDMI ports. Parse that information and take it
into account when filtering modes and computing a crtc state.

Also take the opportunity to sort the platform check if ladder
from new to old.

v2: Add defines for the values into intel_vbt_defs.h (Jani)
    Don't fall back to 0 silently for unknown values (Jani)
    Skip the debug print for the 0 case (Jani)

Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171030145702.23662-1-ville.syrjala@linux.intel.com
2017-10-30 19:48:11 +02:00
Rodrigo Vivi 9c3b2689d0 drm/i915/cnl: Map VBT DDC Pin to BSpec DDC Pin.
Starting on CNL we now need to map VBT DDC Pin to
BSPec DDC Pin values. Not a direct translation anymore.

According to VBT
Block 2 (General Bytes Definition)
DDC Bus

+----------+-----------+--------------------+
| DDI Type | VBT Value | Bspec Mapped Value |
+----------+-----------+--------------------+
| DDI-B    | 0x1       | 0x1                |
| DDI-C    | 0x2       | 0x2                |
| DDI-D    | 0x3       | 0x4                |
| DDI-F    | 0x4       | 0x3                |
+----------+-----------+--------------------+

v2: Move defines to a better place.
    This is actually CNL_PCH not CNL only.
v3: Accepting Ville's suggestions: enums and array to
    to make this future proof.
v4: Protect the array access as Ville suggested.
    Also accepting all Jani's suggestions:
    	      - use already defined gmbus pin definitions.
	      - use map_ddc_pin for disambiguation.
	      - Add /* sic */ comment on inverted values
	      	so people can easily see it it nos a mistake
		we have the map 3 -> 4 and 4 -> 3 :/

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: Clinton Taylor <clinton.a.taylor@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171020172641.16029-1-rodrigo.vivi@intel.com
2017-10-20 16:18:03 -07:00
Madhav Chauhan 6a2f0641d3 drm/i915: Use existing DSI backlight ports info
This patch re-use already parsed DSI backlight/cabc ports
info for saving it inside struct intel_dsi rather than
parsing it at the time of DSI initialization.

V2: Remove backlight and cabc variable initialization (Jani N).

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1507898700-20016-2-git-send-email-madhav.chauhan@intel.com
2017-10-20 11:28:49 +03:00
Madhav Chauhan 46e5832014 drm/i915: Parse DSI backlight/cabc ports.
This patch parse DSI backlight/cabc ports info from
VBT and save them inside local structure. This saved info
can be directly used while initializing DSI for different
platforms instead of parsing for each platform.

V2: Changes:
    - Typo fix in commit message.
    - Move up newly added port variables (Jani N)
    - Remove redundant initialization (Jani N)
    - Don't parse CABC ports if not supported (Jani N)
V3: Patch restructure (Suggested by Jani N)

Credits-to: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1507898700-20016-1-git-send-email-madhav.chauhan@intel.com
2017-10-20 11:28:43 +03:00
Jani Nikula ea850f64c2 drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
While technically CHV isn't DDI, we do look at the VBT based DDI port
info for HDMI DDC pin and DP AUX channel. (We call these "alternate",
but they're really just something that aren't platform defaults.)

In commit e4ab73a132 ("drm/i915: Respect alternate_ddc_pin for all DDI
ports") Ville writes, "IIRC there may be CHV system that might actually
need this."

I'm not sure why there couldn't be even more platforms that need this,
but start conservative, and parse the info for CHV in addition to DDI.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100553
Reported-by: Marek Wilczewski <mw@3cte.pl>
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d0815082cb98487618429b62414854137049b888.1506586821.git.jani.nikula@intel.com
(cherry picked from commit 348e4058eb)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2017-10-11 10:32:57 -07:00
Jani Nikula 0ead5f81d4 drm/i915/bios: don't pass bdb to parsers that don't parse VBT directly
Hint that you're not supposed to look at VBT in these functions.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b82c326be8c796a70bdc2bd1c479bbb6159f5cb0.1506586821.git.jani.nikula@intel.com
2017-10-10 09:06:33 +03:00
Jani Nikula 0ebdabe612 drm/i915/bios: parse SDVO device mapping from pre-parsed child devices
We parse and store the child devices in
parse_general_definitions(). There is no need to parse the VBT block
again for SDVO device mapping. Do the same as we do in
parse_ddi_ports().

We no longer have access to child device size at this stage, but we also
don't need to worry about reading past the child device anymore. Instead
of a child device size check, do a mild optimization by limiting the
parsing to gens 3 through 7.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c918d4173dd38a165295f1270cb16c2c01bd8cd1.1506586821.git.jani.nikula@intel.com
2017-10-10 09:06:17 +03:00
Jani Nikula b3ca1f43b2 drm/i915/bios: merge parse_device_mapping() into parse_general_definitions()
They're both parsing the same block, and there's no need for them to be
split. The former also benefits from the range checks in the latter.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/64a292606ecbb0b8602e6c5523c5746573ec3944.1506586821.git.jani.nikula@intel.com
2017-10-10 09:06:10 +03:00
Jani Nikula 53f6b2436e drm/i915/bios: cleanup comments and useless return
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4a95fb9d23d980830e3158d3c57258e6539965ce.1506586821.git.jani.nikula@intel.com
2017-10-10 09:06:02 +03:00
Jani Nikula 127704f547 drm/i915/bios: remove an unnecessary temp variable
Prepare for merging parse_device_mapping() into
parse_general_definitions(). No functional changes.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f1c3621e2622f4debdfb4a2f5c1959845754ac04.1506586821.git.jani.nikula@intel.com
2017-10-10 09:05:54 +03:00
Jani Nikula 2d936f1cf7 drm/i915/bios: don't initialize fields based on vbt version
In theory, these might clobber information for older VBT versions.

We might have to store the BDB version for later parsing, but currently
all code accessing these fields will only use them on newer platforms
with new enough BDB versions.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/0232d9cb258e8f83c4180cdb8aad1459a312ec2a.1506586821.git.jani.nikula@intel.com
2017-10-10 09:05:44 +03:00
Jani Nikula a87145ca56 drm/i915/bios: refactor parse general definitions
Early return on failures. Rename the variable for later merging with
parse_device_mappings().

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/785abb904a572752fec68d90d34efeb67774dc1f.1506586821.git.jani.nikula@intel.com
2017-10-10 09:05:31 +03:00
Jani Nikula 348e4058eb drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
While technically CHV isn't DDI, we do look at the VBT based DDI port
info for HDMI DDC pin and DP AUX channel. (We call these "alternate",
but they're really just something that aren't platform defaults.)

In commit e4ab73a132 ("drm/i915: Respect alternate_ddc_pin for all DDI
ports") Ville writes, "IIRC there may be CHV system that might actually
need this."

I'm not sure why there couldn't be even more platforms that need this,
but start conservative, and parse the info for CHV in addition to DDI.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100553
Reported-by: Marek Wilczewski <mw@3cte.pl>
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d0815082cb98487618429b62414854137049b888.1506586821.git.jani.nikula@intel.com
2017-10-10 09:05:11 +03:00
Jani Nikula 2ba7d7e043 drm/i915/bios: ignore HDMI on port A
The hardware state readout oopses after several warnings when trying to
use HDMI on port A, if such a combination is configured in VBT. Filter
the combo out already at the VBT parsing phase.

v2: also ignore DVI (Ville)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102889
Cc: stable@vger.kernel.org
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Daniel Drake <dan@reactivated.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170921141920.18172-1-jani.nikula@intel.com
(cherry picked from commit d27ffc1d00)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2017-09-26 09:14:28 -07:00
Jani Nikula d27ffc1d00 drm/i915/bios: ignore HDMI on port A
The hardware state readout oopses after several warnings when trying to
use HDMI on port A, if such a combination is configured in VBT. Filter
the combo out already at the VBT parsing phase.

v2: also ignore DVI (Ville)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102889
Cc: stable@vger.kernel.org
Cc: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Tested-by: Daniel Drake <dan@reactivated.net>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170921141920.18172-1-jani.nikula@intel.com
2017-09-25 10:49:55 +03:00
Michal Wajdeczko 4f044a88a8 drm/i915: Rename global i915 to i915_modparams
Our global struct with params is named exactly the same way
as new preferred name for the drm_i915_private function parameter.
To avoid such name reuse lets use different name for the global.

v5: pure rename
v6: fix

Credits-to: Coccinelle

@@
identifier n;
@@
(
-	i915.n
+	i915_modparams.n
)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Ville Syrjala <ville.syrjala@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170919193846.38060-1-michal.wajdeczko@intel.com
2017-09-22 14:50:36 +03:00
Jani Nikula 058727ee8d drm/i915/bios: amend edp block based on intel_vbt_decode
Copy over some fields defined in the intel_vbt_decode tool. No
functional changes.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8a42f0e4d1bba2679e9cd78da1e31b66133d562f.1503670197.git.jani.nikula@intel.com
2017-08-28 11:04:24 +03:00
Jani Nikula f22bb35856 drm/i915/bios: split up iboost to hdmi and dp bitfields
This is according to the style all over the place. No functional
changes.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/cf5f0e5d10851db3796e632836d23551f59cc412.1503670197.git.jani.nikula@intel.com
2017-08-28 11:01:57 +03:00
Jani Nikula e192839e3e drm/i915/bios: drop the rest of the p_ prefixes from pointers
Not really kernel style, and sticks out like a sore thumb. No functional
changes.

Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/76b4f643e727bae39acd6f73d085f718eb012235.1503600621.git.jani.nikula@intel.com
2017-08-25 16:18:53 +03:00
Jani Nikula 21907e722b drm/i915/bios: throw away struct old_child_dev_config
The old_child_dev_config struct is no longer needed except for its size;
replace with a macro. No functional change.

Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/4bfa6e45fecd33af797ec218635504ec8a09f788.1503600621.git.jani.nikula@intel.com
2017-08-25 16:18:28 +03:00
Jani Nikula cc9985893a drm/i915/bios: throw away high level child device union
All the child device config fields, including legacy, are now available
in the same struct, so use it for everything.

As this change touches plenty of code with "p_child", rename them to
"child" while at it. Also do some simple unification and constification
where not intrusive. This in the name of avoiding extra cleanup churn
for the same lines as here.

No functional changes.

Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/103300a9ae8629624619fc8df2c533e745cc5a78.1503600621.git.jani.nikula@intel.com
2017-08-25 16:18:20 +03:00
Jani Nikula d58107f984 drm/i915/bios: remove the raw version of child device config
Convert the only user of the raw field, switching to the recently added
struct fields. No functional changes.

Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/83e6a2058553a43e0d08a49df1f86821f38b206b.1503600621.git.jani.nikula@intel.com
2017-08-25 16:18:07 +03:00
Jani Nikula b5273d7275 drm/i915/vbt: ignore extraneous child devices for a port
Ever since we've parsed VBT child devices, starting from 6acab15a7b
("drm/i915: use the HDMI DDI buffer translations from VBT"), we've
ignored the child device information if more than one child device
references the same port. The rationale for this seems lost in time.

Since commit 311a20949f ("drm/i915: don't init DP or HDMI when not
supported by DDI port") we started using this information more to skip
HDMI/DP init if the port wasn't there per VBT child devices. However, at
the same time it added port defaults without further explanation.

Thus, if the child device info was skipped due to multiple child devices
referencing the same port, the device info would be retrieved from the
somewhat arbitrary defaults.

Finally, when commit bb1d132935 ("drm/i915/vbt: split out defaults
that are set when there is no VBT") stopped initializing the defaults
whenever VBT is present, thus trusting the VBT more, we stopped
initializing ports which were referenced by more than one child device.

Apparently at least Asus UX305UA, UX305U, and UX306U laptops have VBT
child device blocks which cause this behaviour. Arguably they were
shipped with a broken VBT.

Relax the rules for multiple references to the same port, and use the
first child device info to reference a port. Retain the logic to debug
log about this, though.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101745
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196233
Fixes: bb1d132935 ("drm/i915/vbt: split out defaults that are set when there is no VBT")
Tested-by: Oliver Weißbarth <mail@oweissbarth.de>
Reported-by: Oliver Weißbarth <mail@oweissbarth.de>
Reported-by: Didier G <didierg-divers@orange.fr>
Reported-by: Giles Anderson <agander@gmail.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: <stable@vger.kernel.org> # v4.12+
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170811113907.6716-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-08-16 17:40:37 +03:00
Rodrigo Vivi 75be7756bc drm/i915/cnl: Don't trust VBT's alternate pin for port D for now.
Cannon Lake's VBT that is currently available for B0 stepping
states that port D uses alternate pin 3 messing up with the
default pin-port mapping table. Using that information we cannot
get HDMI working properly. So for now we don't relly on VBT for
this information.

Cc: Clint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Clinton Taylor <clinton.a.taylor@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1499375295-6454-1-git-send-email-rodrigo.vivi@intel.com
2017-07-07 09:11:46 -07:00
Jani Nikula bb1d132935 drm/i915/vbt: split out defaults that are set when there is no VBT
The main thing are the DDI ports. If there's a VBT that says there are
no outputs, we should trust that, and not have semi-random
defaults. Unfortunately, the defaults have resulted in some Chromebooks
without VBT to rely on this behaviour, so we split out the defaults for
the missing VBT case.

Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/95c26079ff640d43f53b944f17e9fc356b36daec.1489152288.git.jani.nikula@intel.com
2017-03-14 10:49:13 +02:00
Jani Nikula 665788572c drm/i915/vbt: don't propagate errors from intel_bios_init()
We don't use the error return for anything other than reporting and
logging that there is no VBT. We can pull the logging in the function,
and remove the error status return. Moreover, if we needed the
information for something later on, we'd probably be better off storing
the bit in dev_priv, and using it where it's needed, instead of using
the error return.

While at it, improve the comments.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/438ebbb0d5f0d321c625065b9cc78532a1dab24f.1489152288.git.jani.nikula@intel.com
2017-03-13 11:52:07 +02:00
Chris Wilson e8f9ae9b50 drm/i915: Use range_overflows()
Replace a few more open-coded overflow checks with the macro.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170106152013.24684-4-chris@chris-wilson.co.uk
2017-01-06 16:02:11 +00:00
Vincente Tsou ce2e87b4ce drm/915: Parsing the missed out DTD fields from the VBT
The upper bits of the vsync width, vsync offset and hsync width
were not parsed from the VBT. Parse these fields in this patch.

V2: Renamed lvds dvo timing structure members and code identation
fix (Jani's review comments)
V3: Corrected commit message, used "from the VBT"

Signed-off-by: Vincente Tsou <vincente.tsou@intel.com>
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1482430993-3265-1-git-send-email-madhav.chauhan@intel.com
2016-12-23 15:13:39 +02:00
Imre Deak a98d9c1d7e drm/i915/ddi: Rely on VBT DDI port info for eDP detection
There is at least one APL based system using port A in DP mode
(connecting to an on-board DP->VGA adaptor). Atm we'll configure port A
unconditionally as eDP which is incorrect in this case. Fix this by
relying on the VBT DDI port 'internal port' flag instead on all ports on
DDI platforms. For now chicken out from using VBT for port A before
GEN9.

v2:
- Move the DDI port info lookup to intel_bios_is_port_edp() (David, Jani)
- Use the DDI port info on all DDI platforms starting from port B.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: David Weinehall <david.weinehall@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v1)
Reviewed-by: David Weinehall <david.weinehall@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1482315444-24750-1-git-send-email-imre.deak@intel.com
2016-12-22 14:22:50 +02:00
Vidya Srinivas add033793c drm/i915: Parse panel backlight controller from VBT
Currently the backlight controller is taken as 0. It needs to derive
value from the VBT. Adding the necessary changes.

v2 by Jani:
 - drop obsolete comments, drop redundant initialization (Bob)
 - merge debug logging into one

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com>
Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
Tested-by: Bob Paauwe <bob.j.paauwe@intel.com>
Tested-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1481189178-426-1-git-send-email-jani.nikula@intel.com
2016-12-12 17:22:08 +02:00
Ander Conselvan de Oliveira cc3f90f063 drm/i915/glk: Reuse broxton code for geminilake
Geminilake is mostly backwards compatible with broxton, so change most
of the IS_BROXTON() checks to IS_GEN9_LP(). Differences between the
platforms will be implemented in follow-up patches.

v2: Don't reuse broxton's path in intel_update_max_cdclk().
    Don't set plane count as in broxton.

v3: Rebase

v4: Include the check intel_bios_is_port_hpd_inverted().
    Commit message.

v5: Leave i915_dmc_info() out; glk's csr version != bxt's. (Rodrigo)

v6: Rebase.

v7: Convert a few mode IS_BROXTON() occurances in pps, ddi, dsi and pll
    code. (Rodrigo)

v8: Squash a couple of DDI patches with more conversions. (Rodrigo)

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1480667037-11215-2-git-send-email-ander.conselvan.de.oliveira@intel.com
2016-12-02 16:38:56 +02:00
Ville Syrjälä 7a17995a3d drm/i915: Assume non-DP++ port if dvo_port is HDMI and there's no AUX ch specified in the VBT
My heuristic for detecting type 1 DVI DP++ adaptors based on the VBT
port information apparently didn't survive the reality of buggy VBTs.
In this particular case we have a machine with a natice HDMI port, but
the VBT tells us it's a DP++ port based on its capabilities.

The dvo_port information in VBT does claim that we're dealing with a
HDMI port though, but we have other machines which do the same even
when they actually have DP++ ports. So that piece of information alone
isn't sufficient to tell the two apart.

After staring at a bunch of VBTs from various machines, I have to
conclude that the only other semi-reliable clue we can use is the
presence of the AUX channel in the VBT. On this particular machine
AUX channel is specified as zero, whereas on some of the other machines
which listed the DP++ port as HDMI have a non-zero AUX channel.

I've also seen VBTs which have dvo_port a DP but have a zero AUX
channel. I believe those we need to treat as DP ports, so we'll limit
the AUX channel check to just the cases where dvo_port is HDMI.

If we encounter any more serious failures with this heuristic I think
we'll have to have to throw it out entirely. But that could mean that
there is a risk of type 1 DVI dongle users getting greeted by a
black screen, so I'd rather not go there unless absolutely necessary.

v2: Remove the duplicate PORT_A check (Daniel)
    Fix some typos in the commit message

Cc: Daniel Otero <daniel.otero@outlook.com>
Cc: stable@vger.kernel.org
Tested-by: Daniel Otero <daniel.otero@outlook.com>
Fixes: d61992565b ("drm/i915: Determine DP++ type 1 DVI adaptor presence based on VBT")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97994
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1478884464-14251-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2016-11-14 16:29:46 +02:00
Ville Syrjälä 9454fa871e drm/i915: Clean up DDI DDC/AUX CH sanitation
Now that we use the AUX and GMBUS assignment from VBT for all ports,
let's clean up the sanitization of the port information a bit.
Previosuly we only did this for port E, and only complained about a
non-standard assignment for the other ports. But as we know that
non-standard assignments are a fact of life, let's expand the
sanitization to all the ports.

v2: Include a commit message, fix up the comments a bit
v3: Don't clobber other ports if the current port has no alternate aux ch/ddc pin

Cc: stable@vger.kernel.org
Cc: Maarten Maathuis <madman2003@gmail.com>
Tested-by: Maarten Maathuis <madman2003@gmail.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=97877
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476208368-5710-4-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Jim Bride <jim.bride@linux.intel.com> (v2)
2016-10-21 15:43:40 +03:00
Shashank Sharma 6389dd8376 drm/i915: Parse VBT data for lspcon
Many GEN9 boards come with on-board lspcon cards.
Fot these boards, VBT configuration should properly point out
if a particular port contains lspcon device, so that driver can
initialize it properly.

This patch adds a utility function, which checks the VBT flag
for lspcon bit, and tells us if a port is configured to have a
lspcon device or not.

V2: Fixed review comments from Ville
- Do not forget PORT_D while checking lspcon for GEN9

V3: Addressed review comments from Rodrigo
- Create a HAS_LSPCON() macro for better use case handling.
- Do not dump warnings for non-gen-9 platforms, it will be noise.

V4: Rebase
V5: Rebase
V6: Pass dev_priv to HAS_LSPCON() macro

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1476455212-27893-4-git-send-email-shashank.sharma@intel.com
2016-10-18 12:42:54 +03:00
Jani Nikula 4b4f497e13 drm/i915/bios: log about presence of DSI sequences we do not run
Leave behind some debugging clues in case some panels don't work
properly.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/b36302b24676af511f4bbf702be21cc7e8f987c2.1474286487.git.jani.nikula@intel.com
2016-09-19 18:38:02 +03:00
Chris Wilson 91c8a326a1 drm/i915: Convert dev_priv->dev backpointers to dev_priv->drm
Since drm_i915_private is now a subclass of drm_device we do not need to
chase the drm_i915_private->dev backpointer and can instead simply
access drm_i915_private->drm directly.

   text	   data	    bss	    dec	    hex	filename
1068757	   4565	    416	1073738	 10624a	drivers/gpu/drm/i915/i915.ko
1066949	   4565	    416	1071930	 105b3a	drivers/gpu/drm/i915/i915.ko

Created by the coccinelle script:
@@
struct drm_i915_private *d;
identifier i;
@@
(
- d->dev->i
+ d->drm.i
|
- d->dev
+ &d->drm
)

and for good measure the dev_priv->dev backpointer was removed entirely.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1467711623-2905-4-git-send-email-chris@chris-wilson.co.uk
2016-07-05 11:58:45 +01:00
Ville Syrjälä 22f3504259 drm/i915: Check VBT for port presence in addition to the strap on VLV/CHV
Apparently some CHV boards failed to hook up the port presence straps
for HDMI ports as well (earlier we assumed this problem only affected
eDP ports). So let's check the VBT in addition to the strap, and if
either one claims that the port is present go ahead and register the
relevant connector.

While at it, change port D to register DP before HDMI as we do for ports
B and C since
commit 457c52d87e ("drm/i915: Only ignore eDP ports that are connected")

Also print a debug message when we register a HDMI connector to aid
in diagnosing missing/incorrect ports. We already had such a print for
DP/eDP.

v2: Improve the comment in the code a bit, note the port D change in
    the commit message

Cc: Radoslav Duda <radosd@radosd.com>
Tested-by: Radoslav Duda <radosd@radosd.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96321
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464945463-14364-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
2016-06-07 18:45:43 +03:00
Ville Syrjälä df457245b5 drm/i915: Extract physical display dimensions from VBT
The VBT has these mysterious H/V image sizes as part of the display
timings. Looking at some dumps those appear to be the physical
dimensions in mm. Which makes sense since the timing descriptor matches
the format used by EDID detailed timing descriptor, which defines these
as "H/V Addressable Video Image Size in mm".

So let's use that information from the panel fixed mode to get the
physical dimensions for LVDS/eDP/DSI displays. And with that we can
fill out the display_info so that userspace can get at it via
GetConnector.

v2: Use (hi<<8)|lo instead of broken (hi<<4)+lo
    Handle LVDS and eDP too

Cc: Stephen Just <stephenjust@gmail.com>
Tested-by: Stephen Just <stephenjust@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96255
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464685714-30507-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
2016-06-02 14:33:09 +03:00
Chris Wilson fa05178c5d drm/i915: Silence "unexpected child device config size" for VBT on 845g
My old 845g complains that the child_device_size inside its VBT,
version 110, is incorrect. Let's fiddle with the version matching such
that it works with this VBT (i.e. treat BIOS v110 as having the same size
as v108).

Fixes [drm:intel_bios_init] *ERROR* Unexpected child device config
size 27 (expected 33 for VBT version 110)

Whether this is correct, no one knows - but it works for this particular
machine.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464800923-6054-1-git-send-email-chris@chris-wilson.co.uk
2016-06-02 12:14:37 +01:00
Chris Wilson 6f9f4b7a2c drm/i915/opregion: Convert to using native drm_i915_private
Prefer passing struct drm_i915_private to internal interfaces as this
saves us having to dance between drm_device and our native struct. The
savings hare are small (only 70 bytes of unrequired dancing), but
progressive!

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1464012490-30961-1-git-send-email-chris@chris-wilson.co.uk
Reviewed-by: Jani Nikula <jani.nikula@linux.intel.com>
2016-05-23 16:35:21 +01:00
Ville Syrjälä d61992565b drm/i915: Determine DP++ type 1 DVI adaptor presence based on VBT
DP dual mode type 1 DVI adaptors aren't required to implement any
registers, so it's a bit hard to detect them. The best way would
be to check the state of the CONFIG1 pin, but we have no way to
do that. So as a last resort, check the VBT to see if the HDMI
port is in fact a dual mode capable DP port.

v2: Deal with VBT code reorganization
    Deal with DRM_DP_DUAL_MODE_UNKNOWN
    Reduce DEVICE_TYPE_DP_DUAL_MODE_BITS a bit
    Accept both DP and HDMI dvo_port in VBT as my BSW
    at least declare its DP port as HDMI :(
v3: Ignore DEVICE_TYPE_NOT_HDMI_OUTPUT (Shashank)

Cc: stable@vger.kernel.org
Cc: Tore Anderson <tore@fud.no>
Reported-by: Tore Anderson <tore@fud.no>
Fixes: 7a0baa6234 ("Revert "drm/i915: Disable 12bpc hdmi for now"")
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1462362322-31278-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
2016-05-09 14:09:38 +03:00
Deepak M 9a41e17de3 drm/i915: Parse LFP brightness control field in VBT
These fields in VBT indicates the PWM source which
is used and also the controller number.

v2 by Jani: check for out of bounds access, some renames, change default
type, etc.

v3 by Jani: s/INTEL_BACKLIGHT_CABC/INTEL_BACKLIGHT_DSI_DCS/

Signed-off-by: Deepak M <m.deepak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/eee2f7b683a081f006a7df1ddad9b20fbf53c48c.1461676337.git.jani.nikula@intel.com
2016-05-02 16:17:38 +03:00
Deepak M 9f7c5b1730 drm/i915: Parsing the PWM cntrl and CABC ON/OFF fields in VBT
For dual link panel scenarios there are new fields added in the
VBT which indicate on which port the PWM cntrl and CABC ON/OFF
commands needs to be sent.

v2: Moving the comment to intel_dsi.h(Jani)

v3: Renaming the field names (Jani)

v4 by Jani: make this patch only about VBT

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Yetunde Adebisi <yetundex.adebisi@intel.com>
Signed-off-by: Deepak M <m.deepak@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459346623-30752-2-git-send-email-jani.nikula@intel.com
2016-04-26 15:49:27 +03:00
Ville Syrjälä a05628195a drm/i915: Get panel_type from OpRegion panel details
We've had problems on several occasions with using the panel type
from the VBT block 40. Usually it seems to be 2, which often
doesn't give us the correct timings for the panel. After some
more digging I found a way to get a panel type via the OpRegion
SWSCI GBDA "Get Panel Details" method. Let's try to use it.

The spec has this to say about the output:
"Bits [15:8] - Panel Type
 Bits contain the panel type user setting from CMOS
 00h = Not Valid, use default Panel Type & Timings from VBT
 01h - 0Fh = Panel Number"

Another version of the spec lists the valid range as 1-16, which makes
more sense since VBT supports 16 panels. Based on actual results
from Rob's G45, 1-16 is what we need to accept.

The other bits in the output don't look relevant for the problem at
hand.

The input is specified as:
"Bits [31:4] - Reserved
 Reserved (must be zero)
 Bits [3:0] - Panel Number
 These bits contain the sequential index of Panel, starting at 0 and
 counting upwards from the first integrated Internal Flat-Panel Display
 Encoder present, and then from the first external Display Encoder
 (e.g., S/DVO-B then S/DVO-C) which supports Internal Flat-Panels.
 0h - 0Fh = Panel number"

For now I've just hardcoded the input panel number as 0. That would seem
like a decent choise for LVDS. Not so sure about eDP when port != A.

v2: Accept values 1-16
    Filter out bogus results in opregion code (Jani)
    Add debug logging for all the different branches (Jani)

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Rob Kramer <rob@solution-space.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94825
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460359431-11003-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Rob Kramer <rob@solution-space.com>
2016-04-12 13:23:43 +03:00
Ville Syrjälä 3e845c7a40 drm/i915: Replace the static panel_type variable with dev_priv->vbt.panel_type
Store the extracted panel_type under dev_priv.vbt instead of keeping
around a static variable for it.

Cc: Rob Kramer <rob@solution-space.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
2016-04-12 13:23:43 +03:00
Ville Syrjälä eeeebea6cb drm/i915: Reject panel_type > 0xf from VBT
VBT can only contain 16 panel entries, indexed with the panel_type.
To play it safe we should reject panel_type > 0xf, so that we don't
read past the valid data.

v2: Add debug logging (Jani)

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Rob Kramer <rob@solution-space.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com> (v1)
Link: http://patchwork.freedesktop.org/patch/msgid/1460359329-10817-1-git-send-email-ville.syrjala@linux.intel.com
2016-04-12 13:23:42 +03:00
Shubhangi Shrivastava d252bf68b7 drm/i915: Set invert bit for hpd based on VBT
This patch sets the invert bit for hpd detection for each port
based on VBT configuration. Since each AOB can be designed to
depend on invert bit or not, it is expected if an AOB requires
invert bit, the user will set respective bit in VBT.

v2: Separated VBT parsing from the rest of the logic. (Jani)

v3: Moved setting invert bit logic to bxt_hpd_irq_setup()
    and changed its logic to avoid looping twice. (Ville)

v4: Changed the logic to mask out the bits first and then
    set them to remove need of temporary variable. (Ville)

v5: Moved defines to existing set of defines for the register
    and added required breaks. (Ville)

Signed-off-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[Jani: fixed some checkpatch noise, added kernel-doc.]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459420907-11383-2-git-send-email-shubhangi.shrivastava@intel.com
2016-04-06 14:22:48 +03:00