deliverable/linux.git
8 years agodrm/msm/dsi: Split PHY drivers to separate files
Hai Li [Thu, 13 Aug 2015 21:45:52 +0000 (17:45 -0400)] 
drm/msm/dsi: Split PHY drivers to separate files

This change moves each PHY type specific code into
separate files.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Return void from msm_dsi_phy_disable()
Hai Li [Thu, 13 Aug 2015 21:45:51 +0000 (17:45 -0400)] 
drm/msm/dsi: Return void from msm_dsi_phy_disable()

We are not checking the return value from msm_dsi_phy_disable().
Change the return type to void.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Specify bitmask to set source PLL
Hai Li [Thu, 13 Aug 2015 21:45:50 +0000 (17:45 -0400)] 
drm/msm/dsi: Specify bitmask to set source PLL

The bit position to configure source PLL will change
on new types of PHYs. The caller should pass down
this information.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp: Clear pending interrupt status before enable interrupt
jilai wang [Wed, 5 Aug 2015 19:33:29 +0000 (15:33 -0400)] 
drm/msm/mdp: Clear pending interrupt status before enable interrupt

Pending interrupt status needs to be cleared before enable the
interrupt. Otherwise it's possible to get a pending interrupt instead
of an incoming interrupt.

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: Add rotation (hflip/vflip) support to MDP5 planes (v2)
jilai wang [Fri, 31 Jul 2015 14:13:26 +0000 (10:13 -0400)] 
drm/msm/mdp5: Add rotation (hflip/vflip) support to MDP5 planes (v2)

MDP5 SSPPs can flip the input source horizontally or vertically.
This change is to add this support to MDP5 planes.

v1: Initial change
v2: Use existing "rotation" property instead of creating msm specific
    properties. In order to be compatiable with legacy non-atomic
    set_property, switch to drm_atomic_helper_plane_set_property
    helper function.

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: add calls to prepare and unprepare panel
Srinivas Kandagatla [Mon, 27 Jul 2015 14:12:39 +0000 (15:12 +0100)] 
drm/msm: add calls to prepare and unprepare panel

Prepare the panel before it's enabled and un-prepare after disable, this
will make sure that the regulators are switched on and off correctly.

Tested it on APQ8064 based IFC6410 with panel.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Modify dsi manager bridge ops to work with external bridges
Archit Taneja [Mon, 3 Aug 2015 08:39:36 +0000 (14:09 +0530)] 
drm/msm/dsi: Modify dsi manager bridge ops to work with external bridges

The dsi bridge ops call drm_panel functions to set up the connected
drm_panel. Add checks to make sure these aren't called when we're
connected to an external bridge.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Allow dsi to connect to an external bridge
Archit Taneja [Fri, 31 Jul 2015 08:36:10 +0000 (14:06 +0530)] 
drm/msm/dsi: Allow dsi to connect to an external bridge

There are platforms where the DSI output can be connected to another
encoder bridge chip (DSI to HDMI, DSI to LVDS etc).

Add support for external bridge support to the dsi driver. We assume that
the external bridge chip would be of the type drm_bridge. The dsi driver's
internal drm_bridge (msm_dsi->bridge) is linked to the external bridge's
drm_bridge struct.

In the case we're connected to an external bridge, we don't need to create
and manage a connector within our driver, it's the bridge driver's
responsibility to create one.

v2:
- Move the external bridge attaching stuff to dsi manager to make things
  cleaner.
- Force the bridge to connect to a video mode encoder for now (the dsi
  mode flags may have not been populated by modeset_init)

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Create a helper to check if there is a connected device
Archit Taneja [Mon, 3 Aug 2015 08:38:33 +0000 (14:08 +0530)] 
drm/msm/dsi: Create a helper to check if there is a connected device

Create a helper msm_dsi_device_connected() which checks whether we have a
device connected to the dsi host or not. This check gets messy when we
have support external bridges too. Having an inline function makes it
more legible.

For now, the check only consists of msm_dsi->panel being non-NULL. Later,
this will check if we have an external bridge or not.

This helper isn't used in dsi_connector related code as that's specific
to only when a drm_panel is connected.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Refer to connected device as 'device' instead of 'panel'
Archit Taneja [Mon, 3 Aug 2015 08:35:45 +0000 (14:05 +0530)] 
drm/msm/dsi: Refer to connected device as 'device' instead of 'panel'

We currently support only panels connected to dsi output. We're going to
also support external bridge chips now.

Change 'panel_node' to 'device_node' in the struct msm_dsi_host and
'panel_flags' to 'device_flags' in msm_dsi. This makes things sound a
bit more generic.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Make TE gpio optional
Archit Taneja [Thu, 25 Jun 2015 09:06:35 +0000 (14:36 +0530)] 
drm/msm/dsi: Make TE gpio optional

Platforms containing only DSI video mode devices don't need a TE gpio.
Make TE gpio optional.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: mdp4 lvds: get panel node via of graph parsing
Archit Taneja [Tue, 9 Jun 2015 08:47:22 +0000 (14:17 +0530)] 
drm/msm: mdp4 lvds: get panel node via of graph parsing

We currently get the output connected to LVDS by looking for a phandle
called 'qcom,lvds-panel' under the mdp DT node.

Use the more standard of_graph approach to create an lvds output port,
and retrieve the panel node from the port's endpoint data.

v3
- Fix return value checks of of_graph_* calls.

Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: dsi host: Use device graph parsing to parse connected panel
Archit Taneja [Thu, 25 Jun 2015 06:13:40 +0000 (11:43 +0530)] 
drm/msm: dsi host: Use device graph parsing to parse connected panel

The dsi host looks for the connected panel node by parsing for a child
named 'panel'. This hierarchy isn't very flexible. The connected
panel is forced to be a child to the dsi host, and hence, a mipi dsi
device. This isn't suitable for dsi devices that don't use mipi dsi
as their control bus.

Follow the of_graph approach of creating ports and endpoints to
represent the connections between the dsi host and the panel connected
to it. In our case, the dsi host will only have one output port, linked
to the panel's input port.

Update DT binding documentation with device graph usage info.

v3:
- Fix return value checks of of_graph_* calls.
- Don't make port a mandatory DT property
- Fix defer check when no panel node specified
- Rename parse_dt func to align with other dsi_host funcs

Reviewed-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: dsi host: add missing of_node_put()
Archit Taneja [Thu, 4 Jun 2015 09:31:57 +0000 (15:01 +0530)] 
drm/msm: dsi host: add missing of_node_put()

Decrement device node refcount if of_get_child_by_name is successfully
called.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: Enable clocks during enable/disable_vblank() callbacks
Hai Li [Mon, 27 Jul 2015 17:49:45 +0000 (13:49 -0400)] 
drm/msm: Enable clocks during enable/disable_vblank() callbacks

AHB clock should be enabled before accessing registers during
enable/disable_vblank(). Since these 2 callbacks are called in
atomic context while clk_prepare may cause thread sleep, a work
is scheduled to control vblanks.

v2: fixup spinlock initialization

Signed-off-by: Hai Li <hali@codeaurora.org>
[add comment about cancel_work_sync() before drm_irq_uninstall()]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: Add support for msm8x74v1
jilai wang [Wed, 8 Jul 2015 22:25:40 +0000 (18:25 -0400)] 
drm/msm/mdp5: Add support for msm8x74v1

msm8x74v1 has different MDP5 version (v1.0) from msm8x74v2 (v1.2).
Add a separate config data to support msm8x74v1.

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: Add DMA pipe planes for MDP5
jilai wang [Tue, 7 Jul 2015 21:17:28 +0000 (17:17 -0400)] 
drm/msm/mdp5: Add DMA pipe planes for MDP5

This change is to add planes which use DMA pipes for MDP5.

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
[slight comment adjust to s/Construct public planes/Construct video
planes/ since DMA planes are public planes too, they just can't scale
or CSC]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp: Add capabilities to MDP planes (v2)
jilai wang [Wed, 8 Jul 2015 22:12:40 +0000 (18:12 -0400)] 
drm/msm/mdp: Add capabilities to MDP planes (v2)

MDP planes can be implemented using different type of HW pipes,
RGB/VIG/DMA pipes for MDP5 and RGB/VG/DMA pipes for MDP4. Each type
of pipe has different HW capabilities such as scaling, color space
conversion, decimation... Add a variable in plane data structure
to specify the difference of each plane which comes from mdp5_cfg data
and use it to differenciate the plane operation.
V1: Initial change
V2: Fix a typo in mdp4_kms.h

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: add more YUV formats for MDP5
Stephane Viau [Mon, 6 Jul 2015 20:35:31 +0000 (16:35 -0400)] 
drm/msm/mdp5: add more YUV formats for MDP5

Add packed YUV422 and planar YUV420 formats to MDP supported
formats.

Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: use 2 memory clients for YUV formats on newer mdp5
Wentao Xu [Mon, 6 Jul 2015 20:35:30 +0000 (16:35 -0400)] 
drm/msm/mdp5: use 2 memory clients for YUV formats on newer mdp5

Newer MDP5 uses 2 shared memory pool clients for certain YUV formats.
For example, if VIG0 is used to fetch data in YUYV format, it will use
VIG0_Y for Y component, and VIG0_Cr for UV packed.

Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
[rebase]
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
8 years agodrm/msm/mdp: mark if a MDP format is YUV at definition
Wentao Xu [Mon, 6 Jul 2015 20:35:29 +0000 (16:35 -0400)] 
drm/msm/mdp: mark if a MDP format is YUV at definition

This makes it easy to determine if a format is YUV. The old
method of using chroma sample type incorrectly marks YUV444 as
RGB format.

Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
[rebase]
Signed-off-by: Stephane Viau <sviau@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dp: use flags argument of devm_gpiod_get to set direction
Uwe Kleine-König [Mon, 6 Jul 2015 09:09:41 +0000 (11:09 +0200)] 
drm/msm/dp: use flags argument of devm_gpiod_get to set direction

Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions)
which appeared in v3.17-rc1, the gpiod_get* functions take an additional
parameter that allows to specify direction and initial value for output.

Use this to simplify the driver. Furthermore this is one caller less
that stops us making the flags argument to gpiod_get*() mandatory.

Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Save/Restore PLL status across PHY reset
Hai Li [Fri, 3 Jul 2015 14:09:46 +0000 (10:09 -0400)] 
drm/msm/dsi: Save/Restore PLL status across PHY reset

Reset DSI PHY silently changes its PLL registers to reset status,
which will make cached status in clock driver invalid and result
in wrong output rate of link clocks. The current restore mechanism
in DSI PLL does not cover all the cases. This change is to recover
PLL status after PHY reset to match HW status with cached status
in clock driver.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: One function call less in dsi_init() after error detection
Markus Elfring [Sat, 27 Jun 2015 20:23:28 +0000 (22:23 +0200)] 
drm/msm/dsi: One function call less in dsi_init() after error detection

The dsi_destroy() function was called in two cases by the dsi_init() function
during error handling even if the passed variable contained a null pointer.

* This implementation detail could be improved by adjustments for jump
  targets according to the Linux coding style convention.

* Drop an unnecessary initialisation for the variable "msm_dsi" then.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
[add couple missing ERR_PTR()'s]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Delete an unnecessary check before the function call "dsi_destroy"
Markus Elfring [Sat, 27 Jun 2015 20:05:31 +0000 (22:05 +0200)] 
drm/msm/dsi: Delete an unnecessary check before the function call "dsi_destroy"

The dsi_destroy() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: Allocate CTL0/1 for dual DSI single FLUSH
Hai Li [Fri, 26 Jun 2015 20:03:26 +0000 (16:03 -0400)] 
drm/msm/mdp5: Allocate CTL0/1 for dual DSI single FLUSH

This change takes advantage of a HW feature that synchronize
flush operation on CTL1 to CTL0, to keep dual DSI pipes in
sync.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: Allocate CTL for each display interface
Hai Li [Fri, 26 Jun 2015 20:03:25 +0000 (16:03 -0400)] 
drm/msm/mdp5: Allocate CTL for each display interface

In MDP5, CTL contains information of the whole pipeline whose
output goes down to a display interface. In various cases, one
interface may require 2 CRTCs, but only one CTL. Some interfaces
also require to use certain CTLs.

Instead of allocating CTL for each active CRTC, this change is to
associate a CTL with each interface.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: Add plane blending operation support for MDP5 (v2)
jilai wang [Thu, 25 Jun 2015 21:37:42 +0000 (17:37 -0400)] 
drm/msm/mdp5: Add plane blending operation support for MDP5 (v2)

This change is to add properties alpha/zpos/blend_mode to mdp5 plane
for alpha blending operation to generate the blended output.
v1: Initial change
v2: Change "premultilied" property to enum (Rob's comment)

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
[Don't actually expose alpha/premultiplied props to userspace yet
pending a chance for discussion and some userspace to exercise it]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: don't install plane properties on crtc
Rob Clark [Tue, 28 Jul 2015 15:05:03 +0000 (11:05 -0400)] 
drm/msm: don't install plane properties on crtc

This was a hold-over from the pre-atomic days and legacy userspace that
only understood CRTCs.  Fortunately we don't have any properties, so
this doesn't change anything.  But before we start growing some plane
properties, we should fix this.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Report PHY errors only when they really occur
Archit Taneja [Thu, 25 Jun 2015 05:59:24 +0000 (11:29 +0530)] 
drm/msm/dsi: Report PHY errors only when they really occur

DSI PHY errors are falsely reported whenever a dsi error occurs. This is
because DSI_DLN0_PHY_ERR isn't only used as a status register, but also
used to mask PHY errors. Currently, we end up reading the mask bits too
and therefore always report errors.

Ignore the register mask bits and check for only the status/clear bits.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: Set different display size limitation on each target
Hai Li [Wed, 24 Jun 2015 23:13:40 +0000 (19:13 -0400)] 
drm/msm: Set different display size limitation on each target

The maximum output width of one pipeline depends on the LayerMixer's
capability. It may be different on each target. Also, MDP5 doesn't
have vertical limitation in one frame, as long as the pixel clock
can be supported.

This change obtains the maximum LM resolution from configuration
table and treat it as the whole pipe's limitation for MDP5. The size
limit on MDP4 is not changed.

Signed-off-by: Hai Li <hali@codeaurora.org>
8 years agodrm/msm/hdmi: standardize on lead chip for compatible names
Rob Clark [Tue, 28 Jul 2015 00:52:50 +0000 (20:52 -0400)] 
drm/msm/hdmi: standardize on lead chip for compatible names

For all of these devices, msm89xy was the lead chip, so standardize the
compatible names to align with convention used by rest of the qcom/msm
drivers.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: Add support for msm8x94
Stephane Viau [Fri, 19 Jun 2015 20:04:47 +0000 (16:04 -0400)] 
drm/msm: Add support for msm8x94

This change adds the MDP and HDMI support for msm8x94.
Note that HDMI PHY registers are not being accessed anymore from
the driver.

Signed-off-by: Stephane Viau <sviau@codeaurora.org>
[rename compatible s/8x94/8994/ since preference is to not trust the
marketing folks who invent chip #'s but instead name things after the
lead chip.. we should rename some 80XY to 89XY to standardize on the
lead chip but leave that for another patch.  Also, update dt bindings
doc]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/hdmi: remove ->reset() from HDMI PHY
Stephane Viau [Fri, 19 Jun 2015 20:04:46 +0000 (16:04 -0400)] 
drm/msm/hdmi: remove ->reset() from HDMI PHY

->reset() currently only accesses HDMI core registers, and yet it
is located in hdmi_phy*. Since no PHY registers are being
accessed during ->reset(), it would be better to bring that
function in hdmi core module where HDMI core registers are
usually being accessed.

This will also help for msm8x94 for which no PHY registers
accesses are done (->phy_init == NULL) but the HDMI PHY reset
from HDMI core still needs to be done.

Note:
SW_RESET_PLL bit is not written in hdmi_phy_8x60_reset(); this
write should not affect anything if the corresponding field is
not writable.

Signed-off-by: Stephane Viau <sviau@codeaurora.org>
[fixed warning about unused 'phy' in hpd_enable() while merging]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Add support for msm8x94
Hai Li [Thu, 18 Jun 2015 14:14:21 +0000 (10:14 -0400)] 
drm/msm/dsi: Add support for msm8x94

DSI controller on msm8x94 is version 1.3, which requires different
power supplies and works with 20nm DSI PHY. This change is to add
the basic support for this version.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Use pinctrl in DSI driver
Hai Li [Thu, 11 Jun 2015 14:56:46 +0000 (10:56 -0400)] 
drm/msm/dsi: Use pinctrl in DSI driver

Some targets use pinctrl framework to configure some
pins. This change allows DSI driver to set default and
sleep pinctrl status.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Rename *dual panel* to *dual DSI*
Hai Li [Wed, 10 Jun 2015 17:18:18 +0000 (13:18 -0400)] 
drm/msm/dsi: Rename *dual panel* to *dual DSI*

The current term of *dual panel* in DSI driver code causes confusion.
It is supposed to indicate the panel using two DSI links. Rename it
to *dual DSI*.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Update source PLL selection in DSI PHY
Hai Li [Wed, 10 Jun 2015 17:18:17 +0000 (13:18 -0400)] 
drm/msm/dsi: Update source PLL selection in DSI PHY

The source PLL to be used by each DSI PHY should be decided by
DSI manager based on dual DSI information, while the register
programming to select PLL is different from one type of PHY to
another. This change adds the H/W difference to PHY configuration
and updates the interface between DSI manager and PHY.

With this change, PLL selection can be supported on different
targets.

Signed-off-by: Hai Li <hali@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/hdmi: add hdmi hdcp support (V3)
jilai wang [Thu, 2 Apr 2015 21:49:01 +0000 (17:49 -0400)] 
drm/msm/hdmi: add hdmi hdcp support (V3)

Add HDMI HDCP support including HDCP PartI/II/III authentication.
V1: Initial Change
V2: Address Bjorn&Rob's comments
    Refactor the authentication process to use single work instead
    of multiple work for different authentication stages.
V3: Update to align with qcom SCM api.

Signed-off-by: Jilai Wang <jilaiw@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: update generated headers
Rob Clark [Mon, 27 Jul 2015 23:37:12 +0000 (19:37 -0400)] 
drm/msm: update generated headers

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp5: release SMB (shared memory blocks) in various cases
Wentao Xu [Fri, 19 Jun 2015 18:03:42 +0000 (14:03 -0400)] 
drm/msm/mdp5: release SMB (shared memory blocks) in various cases

Release all blocks after the pipe is disabled, even when vsync
didn't happen in some error cases. Allow requesting SMB multiple
times before configuring to hardware, by releasing blocks not
programmed to hardware yet for shrinking case.

This fixes a potential leak of shared memory pool blocks.

Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
Tested-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: change to uninterruptible wait in atomic commit
Wentao Xu [Mon, 22 Jun 2015 15:53:42 +0000 (11:53 -0400)] 
drm/msm: change to uninterruptible wait in atomic commit

The atomic commit cannot easily undo and return an error once the
state is swapped. Change to uninterruptible wait, and ignore the
timeout error.

Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: mdp4: Fix drm_framebuffer dereference crash
Archit Taneja [Fri, 26 Jun 2015 10:19:43 +0000 (15:49 +0530)] 
drm/msm: mdp4: Fix drm_framebuffer dereference crash

mdp4_get_frame_format() can dereference a drm_framebuffer when it's NULL.
Call it in mdp4_plane_mode_set only when we know fb is non-NULL.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: fix msm_gem_prime_get_sg_table()
Rob Clark [Thu, 23 Jul 2015 17:44:56 +0000 (13:44 -0400)] 
drm/msm: fix msm_gem_prime_get_sg_table()

We need to return a new sgt, since the caller takes ownership of it.

Reported-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agoMerge tag 'drm-amdkfd-next-fixes-2015-08-05' of git://people.freedesktop.org/~gabbayo...
Dave Airlie [Fri, 14 Aug 2015 00:15:24 +0000 (10:15 +1000)] 
Merge tag 'drm-amdkfd-next-fixes-2015-08-05' of git://people.freedesktop.org/~gabbayo/linux into drm-next

Two small bug fixes for the code you pulled for 4.3:

- Used a SHIFT define instead of a MASK define to check if a bit is turned on
  when destroying hqd. Luckily, this is in gfx7 interface file with amdgpu,
  which was used only for bring-up purposes of amdgpu, so no real effect on
  a running system

- Used a logical AND instead of a bitwise AND operator, when initializing
  sdma virtual memory when using SDMA queues

* tag 'drm-amdkfd-next-fixes-2015-08-05' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: fix bug when initializing sdma vm
  drm/amdgpu: fix bug when amdkfd destroys hqd

8 years agoMerge branch 'drm-sti-next-atomic-2015-08-11' of http://git.linaro.org/people/benjami...
Dave Airlie [Fri, 14 Aug 2015 00:14:23 +0000 (10:14 +1000)] 
Merge branch 'drm-sti-next-atomic-2015-08-11' of git.linaro.org/people/benjamin.gaignard/kernel into drm-next

This serie of patches fix minor bugs around how driver sub-components are
bind and planes z-ordering.
The main part is about atomic support: using more atomic helpers allow us
to simplify the code (~300 lines removed) and to ahve a better match between
drm concepts (planes and crtc) and hardware split.

[airlied: fixed up conflict in atomic code]

* 'drm-sti-next-atomic-2015-08-11' of http://git.linaro.org/people/benjamin.gaignard/kernel:
  drm/sti: atomic crtc/plane update
  drm/sti: rename files and functions
  drm/sti: code clean up
  drm/sti: fix dynamic z-ordering
  drm: sti: fix sub-components bind

8 years agoMerge tag 'topic/drm-misc-2015-08-13' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 14 Aug 2015 00:02:21 +0000 (10:02 +1000)] 
Merge tag 'topic/drm-misc-2015-08-13' of git://anongit.freedesktop.org/drm-intel into drm-next

Final drm-misc pull for 4.3:
- fbdev emulation Kconfig option for everyone thanks to Archit. It's not
  everything yet bit this is fairly tricky since it spawns all drivers.
- vgaarb & vgaswitcheroo polish from Thierry
- some drm_irq.c cleanups (Thierry)
- struct_mutex crusade from me
- more fbdev panic handling removal
- various things all over in drm core&helpers

* tag 'topic/drm-misc-2015-08-13' of git://anongit.freedesktop.org/drm-intel: (65 commits)
  drm/atomic: Use KMS VBLANK API
  drm/irq: Document return values more consistently
  drm/irq: Make pipe unsigned and name consistent
  drm/irq: Check for valid VBLANK before dereference
  drm/irq: Remove negative CRTC index special-case
  drm/plane: Remove redundant extern
  drm/plane: Use consistent data types for format count
  vga_switcheroo: Remove unnecessary checks
  vga_switcheroo: Wrap overly long lines
  vga_switcheroo: Use pr_fmt()
  vga_switcheroo: Cleanup header comment
  vga_switcheroo: Use pr_*() instead of printk()
  vgaarb: Fix a few checkpatch errors and warnings
  vgaarb: Use vgaarb: prefix consistently in messages
  vgaarb: Stop complaining about absent devices
  drm/atomic: fix null pointer access to mode_fixup callback
  drm/i915: Use CONFIG_DRM_FBDEV_EMULATION
  drm/core: Set mode to NULL when connectors in a set drops to 0.
  drm/atomic: Call ww_acquire_done after check phase is complete
  drm/atomic: Paper over locking WARN in default_state_clear
  ...

8 years agodrm/atomic: Use KMS VBLANK API
Thierry Reding [Wed, 12 Aug 2015 15:00:35 +0000 (17:00 +0200)] 
drm/atomic: Use KMS VBLANK API

Instead of using the legacy VBLANK API, use the new KMS API. This is
part of an effort to convert all existing users so that the KMS API can
be changed to properly use per-CRTC data.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/irq: Document return values more consistently
Thierry Reding [Wed, 12 Aug 2015 15:00:33 +0000 (17:00 +0200)] 
drm/irq: Document return values more consistently

Some of the functions are documented inconsistently. Add Returns:
sections where missing and use consistent style to describe the return
value.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/irq: Make pipe unsigned and name consistent
Thierry Reding [Wed, 12 Aug 2015 15:00:31 +0000 (17:00 +0200)] 
drm/irq: Make pipe unsigned and name consistent

Name all references to the pipe number (CRTC index) consistently to make
it easier to distinguish which is a pipe number and which is a pointer
to struct drm_crtc.

While at it also make all references to the pipe number unsigned because
there is no longer any reason why it should ever be negative.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/irq: Check for valid VBLANK before dereference
Thierry Reding [Wed, 12 Aug 2015 15:00:30 +0000 (17:00 +0200)] 
drm/irq: Check for valid VBLANK before dereference

When accessing the array of per-CRTC VBLANK structures we must always
check that the index into the array is valid before dereferencing to
avoid crashing.

Signed-off-by: Thierry Reding <treding@nvidia.com>
[danvet: Squash in my own whitespace ocd fixup in drm_vblank_count.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/irq: Remove negative CRTC index special-case
Thierry Reding [Wed, 12 Aug 2015 15:00:24 +0000 (17:00 +0200)] 
drm/irq: Remove negative CRTC index special-case

The drm_send_vblank_event() function treats negative CRTC indices as
meaning that a driver doesn't have proper VBLANK handling. This is the
only place where DRM needs negative CRTC indices, so in order to enable
subsequent cleanup, remove this special case and replace it by the more
obvious check for whether or not VBLANK support was initialized.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/plane: Remove redundant extern
Thierry Reding [Wed, 12 Aug 2015 14:54:29 +0000 (16:54 +0200)] 
drm/plane: Remove redundant extern

Use of the extern keyword for function prototypes is unnecessary, so it
can be removed.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/plane: Use consistent data types for format count
Thierry Reding [Wed, 12 Aug 2015 14:54:28 +0000 (16:54 +0200)] 
drm/plane: Use consistent data types for format count

Rather than a mix of the the sized uint32_t and signed integer, use an
unsized unsigned int to specify the format count.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovga_switcheroo: Remove unnecessary checks
Thierry Reding [Wed, 12 Aug 2015 14:32:12 +0000 (16:32 +0200)] 
vga_switcheroo: Remove unnecessary checks

debugfs_remove() gracefully ignores NULL parameters, so the explicit
checks can be removed.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovga_switcheroo: Wrap overly long lines
Thierry Reding [Wed, 12 Aug 2015 14:32:11 +0000 (16:32 +0200)] 
vga_switcheroo: Wrap overly long lines

Wrap overly long lines to make checkpatch happy. While at it, also add
blank lines after declarations to eliminate additional problems flagged
by checkpatch.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovga_switcheroo: Use pr_fmt()
Thierry Reding [Wed, 12 Aug 2015 14:32:10 +0000 (16:32 +0200)] 
vga_switcheroo: Use pr_fmt()

Use pr_fmt() to define the "vga_switcheroo: " prefix that is prepended
to all output messages emitted by pr_*() functions. This allows making
existing strings much shorter and eliminates a bunch of warnings from
checkpatch about lines being overly long.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovga_switcheroo: Cleanup header comment
Thierry Reding [Wed, 12 Aug 2015 14:32:09 +0000 (16:32 +0200)] 
vga_switcheroo: Cleanup header comment

The header comment uses a weird combination of formatting styles. Make
it consistent.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovga_switcheroo: Use pr_*() instead of printk()
Thierry Reding [Wed, 12 Aug 2015 14:32:08 +0000 (16:32 +0200)] 
vga_switcheroo: Use pr_*() instead of printk()

This silences a bunch of checkpatch warnings and makes the code shorter.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovgaarb: Fix a few checkpatch errors and warnings
Thierry Reding [Wed, 12 Aug 2015 14:32:07 +0000 (16:32 +0200)] 
vgaarb: Fix a few checkpatch errors and warnings

Wrap overly long lines (offending lines were mostly comments, so trivial
to fix up) and a number of other coding style issues pointed out by the
checkpatch tool.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovgaarb: Use vgaarb: prefix consistently in messages
Thierry Reding [Wed, 12 Aug 2015 14:32:06 +0000 (16:32 +0200)] 
vgaarb: Use vgaarb: prefix consistently in messages

Define the pr_fmt() macro to causes all messages emitted by pr_*()
functions to be prefixed with "vgaarb: ".

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agovgaarb: Stop complaining about absent devices
Thierry Reding [Wed, 12 Aug 2015 14:32:05 +0000 (16:32 +0200)] 
vgaarb: Stop complaining about absent devices

Some setups do not register a default VGA device, in which case the VGA
arbiter will still complain about the (non-existent) PCI device being a
non-VGA device.

Fix this by making the error message conditional on a default VGA device
having been set up. Note that the easy route of erroring out early isn't
going to work because otherwise priv->target won't be properly updated.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/atomic: fix null pointer access to mode_fixup callback
Inki Dae [Tue, 11 Aug 2015 12:23:49 +0000 (21:23 +0900)] 
drm/atomic: fix null pointer access to mode_fixup callback

This patch fixes null pointer access incurred when
encoder driver didn't set its own mode_fixup callback.

mode_fixup callback shoudn't be called if the callback
of drm_encoder_helper_funcs is NULL.

Changelog v2:
- change it to else if

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/i915: Use CONFIG_DRM_FBDEV_EMULATION
Daniel Vetter [Mon, 10 Aug 2015 11:34:08 +0000 (13:34 +0200)] 
drm/i915: Use CONFIG_DRM_FBDEV_EMULATION

Instead of our own duplicated one. This fixes a bug in the driver
unload code if DRM_FBDEV_EMULATION=n but DRM_I915_FBDEV=y because we
try to unregister the nonexistent fbdev drm_framebuffer.

Cc: Archit Taneja <architt@codeaurora.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/core: Set mode to NULL when connectors in a set drops to 0.
Maarten Lankhorst [Tue, 11 Aug 2015 07:54:59 +0000 (09:54 +0200)] 
drm/core: Set mode to NULL when connectors in a set drops to 0.

Without this when a MST connector is removed drm_atomic_helper_set_config
can complain about set->mode && !set->num_connectors.

------------[ cut here ]------------
WARNING: CPU: 2 PID: 2403 at drivers/gpu/drm/drm_atomic_helper.c:1673 drm_atomic_helper_set_config+0x22e/0x420()
CPU: 2 PID: 2403 Comm: kms_flip Not tainted 4.2.0-rc5 #4233
Hardware name: NUC5i7RYB, BIOS RYBDWi35.86A.0246.2015.0309.1355 03/09/2015
 ffffffff81ac75e8 ffff88004e4ffbf8 ffffffff81714c34 0000000080000000
 0000000000000000 ffff88004e4ffc38 ffffffff8107bf81 ffff88004e4ffc48
 ffff8800d8ca0690 ffff8800d8d7a080 ffff8800d8cc2290 ffff8800d07bc9f0
Call Trace:
 [<ffffffff81714c34>] dump_stack+0x4f/0x7b
 [<ffffffff8107bf81>] warn_slowpath_common+0x81/0xc0
 [<ffffffff8107c065>] warn_slowpath_null+0x15/0x20
 [<ffffffff813d9e3e>] drm_atomic_helper_set_config+0x22e/0x420
 [<ffffffff813da174>] ? drm_atomic_helper_plane_set_property+0x84/0xc0
 [<ffffffff813ee101>] drm_mode_set_config_internal+0x61/0x100
 [<ffffffff813dc4ed>] restore_fbdev_mode+0xbd/0xe0
 [<ffffffff813de1e4>] drm_fb_helper_restore_fbdev_mode_unlocked+0x24/0x70
 [<ffffffffc0123d11>] intel_fbdev_restore_mode+0x21/0x80 [i915]
 [<ffffffffc014bf69>] i915_driver_lastclose+0x9/0x10 [i915]
 [<ffffffff813e2429>] drm_lastclose+0x29/0x130
 [<ffffffff813e2844>] drm_release+0x314/0x500
 [<ffffffff81194795>] __fput+0xe5/0x1f0
 [<ffffffff811948d9>] ____fput+0x9/0x10
 [<ffffffff810968d8>] task_work_run+0x88/0xb0
 [<ffffffff8107d53f>] do_exit+0x37f/0xa90
 [<ffffffff8127e258>] ? selinux_file_ioctl+0x48/0xc0
 [<ffffffff81277dfe>] ? security_file_ioctl+0x3e/0x60
 [<ffffffff8107ec80>] do_group_exit+0x40/0xa0
 [<ffffffff8107ecef>] SyS_exit_group+0xf/0x10
 [<ffffffff8171bdd7>] entry_SYSCALL_64_fastpath+0x12/0x6a
---[ end trace 0daf358c49351567 ]---

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/atomic: Call ww_acquire_done after check phase is complete
Daniel Vetter [Thu, 6 Aug 2015 13:06:40 +0000 (15:06 +0200)] 
drm/atomic: Call ww_acquire_done after check phase is complete

We want to make sure that no one tries to acquire more locks and
states, and ww mutexes provide debug facilities for that. So use them.

v2: Only call acquire_done when ->atomic_check was successful to avoid
falling over an -EDEADLK (spotted by Maarten).

Cc: Rob Clark <robdclark@gmail.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/atomic: Paper over locking WARN in default_state_clear
Daniel Vetter [Wed, 29 Jul 2015 10:51:41 +0000 (12:51 +0200)] 
drm/atomic: Paper over locking WARN in default_state_clear

In

commit 6f75cea66c8dd043ced282016b21a639af176642
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Nov 19 18:38:07 2014 +0100

    drm/atomic: Only destroy connector states with connection mutex held

I tried to fix races of atomic commits against connector
hot-unplugging. The idea is to ensure lifetimes by holding the
connection_mutex long enough. That works for synchronous commits, but
not for async ones.

For async atomic commit we really need to fix up connector lifetimes
for real. But that's a much bigger task, so just add more duct-tape:
For cleaning up connector states we currently don't need the connector
itself. So NULL it out and remove the locking check. Of course that
check was to protect the entire sequence, but the modeset itself
should be save since currently DP MST hot-removal does a dpms-off. And
that should synchronize with any outstanding async atomic commit.

Or at least that's my hope, this is all a giant mess.

Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/edid: Use ARRAY_SIZE in drm_add_modes_noedid
Daniel Vetter [Mon, 10 Aug 2015 09:55:37 +0000 (11:55 +0200)] 
drm/edid: Use ARRAY_SIZE in drm_add_modes_noedid

Spotted while reading code for random reasons.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/qxl: Don't take dev->struct_mutex in bo_force_delete
Daniel Vetter [Thu, 9 Jul 2015 21:32:46 +0000 (23:32 +0200)] 
drm/qxl: Don't take dev->struct_mutex in bo_force_delete

It really doesn't protect anything which doesn't have other locks
already. It also doesn't seem to be wired up into the driver unload
code fwiw, but that's a different issue.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/nouveau: Don't take dev->struct_mutex in ttm_fini
Daniel Vetter [Thu, 9 Jul 2015 21:32:45 +0000 (23:32 +0200)] 
drm/nouveau: Don't take dev->struct_mutex in ttm_fini

This is only called in driver load/unload paths, no need to grab any
locks at all. Also, ttm takes care of itself anyway.

Cc: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/rockchip: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:42 +0000 (23:32 +0200)] 
drm/rockchip: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Aside: I stumbled over the mmap handler which directly does a
dma_mmap_attrs. But totally fails to grab a reference on the
underlying object and hence looks like it happily just leaks the ptes
since there's no guarantee the mmap isn't still around when
gem_free_object is called. Which the kerneldoc of dma_mmap_attrs
explicitly forbids.

v2: Fixup compile fail 0-day spotted.

Cc: Mark Yao <mark.yao@rock-chips.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/cma-helper: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:41 +0000 (23:32 +0200)] 
drm/cma-helper: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:40 +0000 (23:32 +0200)] 
drm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/mga200g: Hold a proper reference for cursor_set
Daniel Vetter [Thu, 9 Jul 2015 21:32:39 +0000 (23:32 +0200)] 
drm/mga200g: Hold a proper reference for cursor_set

Looking up an obj, immediate dropping the acquired reference and then
continuing to use it isn't how this is supposed to work. Fix this by
holding a reference for the entire function.

While at it stop grabbing dev->struct_mutex, it doesn't protect
anything here.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/mga200g: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:38 +0000 (23:32 +0200)] 
drm/mga200g: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/bochs: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:37 +0000 (23:32 +0200)] 
drm/bochs: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:36 +0000 (23:32 +0200)] 
drm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/gem: Be more friendly with locking checks
Daniel Vetter [Thu, 9 Jul 2015 21:32:35 +0000 (23:32 +0200)] 
drm/gem: Be more friendly with locking checks

BUG_ON kills the driver, WARN_ON is much friendlier. And usually nothing
bad happens when the locking is slightly busted.

v2: Fix typos in commit message Thierry spotted.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm: Remove two-level menu in Kconfig
Thierry Reding [Fri, 7 Aug 2015 16:10:17 +0000 (18:10 +0200)] 
drm: Remove two-level menu in Kconfig

The Direct Rendering Manager Kconfig option is already a separate menu,
so remove the extra level to make it easier to navigate.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm: Add top level Kconfig option for DRM fbdev emulation
Archit Taneja [Wed, 5 Aug 2015 06:58:57 +0000 (12:28 +0530)] 
drm: Add top level Kconfig option for DRM fbdev emulation

Legacy fbdev emulation support via DRM is achieved through KMS FB helpers.
Most modesetting drivers enable provide fbdev emulation by default by
selecting KMS FB helpers. A few provide a separate Kconfig option for the
user to enable or disbale fbdev emulation.

Enabling fbdev emulation is finally a distro-level decision. Having a top
level Kconfig option for fbdev emulation helps by providing a uniform way
to enable/disable fbdev emulation for any modesetting driver. It also lets
us remove unnecessary driver specific Kconfig options that causes bloat.

With a top level Kconfig in place, we can stub out the fb helper functions
when not needed without breaking functionality. Having stub functions also
prevents drivers to require wrapping fb helper function calls with #ifdefs.

DRM_FBDEV_EMULATION defaults to y since many drivers enable fbdev
emulation by default and majority of distributions expect the fbdev
interface in the kernel.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/fb-helper: Move drm_fb_helper_force_kernel_mode() inside #ifdef
Geert Uytterhoeven [Tue, 4 Aug 2015 13:22:11 +0000 (15:22 +0200)] 
drm/fb-helper: Move drm_fb_helper_force_kernel_mode() inside #ifdef

If CONFIG_MAGIC_SYSRQ is not set:

    drivers/gpu/drm/drm_fb_helper.c:390:13: warning: 'drm_fb_helper_force_kernel_mode' defined but not used [-Wunused-function]
     static bool drm_fb_helper_force_kernel_mode(void)
 ^

Move drm_fb_helper_force_kernel_mode() inside the existing #ifdef to fix
this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/fb-helper: Clarify drm_fb_helper_restore_fbdev_mode*()
Geert Uytterhoeven [Tue, 4 Aug 2015 13:22:10 +0000 (15:22 +0200)] 
drm/fb-helper: Clarify drm_fb_helper_restore_fbdev_mode*()

As of commit 5ea1f752ae04be40 ("drm: add
drm_fb_helper_restore_fbdev_mode_unlocked()"),
drm_fb_helper_restore_fbdev_mode() is no longer public, and drivers
should call drm_fb_helper_restore_fbdev_mode_unlocked() from their
->lastclose callbacks instead.

Update the documentation to reflect this, and absorb the one liner
drm_fb_helper_restore_fbdev_mode() into its single caller.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrivers: gpu: Drop unlikely before IS_ERR(_OR_NULL)
Viresh Kumar [Fri, 31 Jul 2015 08:38:24 +0000 (14:08 +0530)] 
drivers: gpu: Drop unlikely before IS_ERR(_OR_NULL)

IS_ERR(_OR_NULL) already contain an 'unlikely' compiler flag and there
is no need to do that again from its callers. Drop it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/virtio: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:52:01 +0000 (16:22 +0530)] 
drm/virtio: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- add missing header for virtgpu_fb.c

Cc: David Airlie <airlied@linux.ie>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/amdgpu: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:52:00 +0000 (16:22 +0530)] 
drm/amdgpu: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- Fixed PTR_ERR issue mentioned by kbuild bot

Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/bochs: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:59 +0000 (16:21 +0530)] 
drm/bochs: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- remove unused variable device in bochsfb_create

Cc: David Airlie <airlied@linux.ie>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/nouveau: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:57 +0000 (16:21 +0530)] 
drm/nouveau: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- remove unused variable pdev in nouveau_fbcon_create

Cc: David Airlie <airlied@linux.ie>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/i915: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:56 +0000 (16:21 +0530)] 
drm/i915: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- No changes

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/radeon: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:54 +0000 (16:21 +0530)] 
drm/radeon: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- Fix build break because of missing include of drm_fb_helper in
  radeon_drv.c

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/mgag200: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:53 +0000 (16:21 +0530)] 
drm/mgag200: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- remove unused goto label 'out'

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/omap: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:48 +0000 (16:21 +0530)] 
drm/omap: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Update error handling for new drm_fb_helper funcs. Check using IS_ERR()
  instead of checking for NULL.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
v2:
- No changes

Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/cirrus: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:44 +0000 (16:21 +0530)] 
drm/cirrus: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- Remove stray goto label out_iounmap

Cc: Thierry Reding <treding@nvidia.com>
Cc: Zach Reizner <zachr@google.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm: Fixup locking WARNINGs in drm_mode_config_reset
Daniel Vetter [Wed, 29 Jul 2015 06:32:43 +0000 (08:32 +0200)] 
drm: Fixup locking WARNINGs in drm_mode_config_reset

With

commit 7a3f3d6667f5f9ffd1517f6b21d64bbf5312042c
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 9 23:44:28 2015 +0200

    drm: Check locking in drm_for_each_connector

we started checking the locking in drm_for_each_connector but somehow
I totally missed drm_mode_config_reset. There's no problem there since
this function should only be called in single-threaded contexts
(driver load or resume), so just wrap the loop with the right lock.

v2: Drink coffee and all that ...

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm: Remove __drm_modeset_lock_all
Daniel Vetter [Tue, 28 Jul 2015 11:18:42 +0000 (13:18 +0200)] 
drm: Remove __drm_modeset_lock_all

The last user is gone, no need for trylocking any more in this legacy
helper.

Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/fb-helper: Stop using trylocks in force_restore
Daniel Vetter [Tue, 28 Jul 2015 11:18:41 +0000 (13:18 +0200)] 
drm/fb-helper: Stop using trylocks in force_restore

Since the panic handling is gone this is only used for force-restoring
the fbdev/fbcon from sysrq, and that's done with a work item. No need
any more to do trylocks, we can just do normal locking.

Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/fbdev: Return -EBUSY when oopsing
Daniel Vetter [Tue, 28 Jul 2015 11:18:40 +0000 (13:18 +0200)] 
drm/fbdev: Return -EBUSY when oopsing

Trying to do anything with kms drivers when oopsing has become a
failing proposition. But since we can end up in the fbdev code simply
due to the console unblanking that's done unconditionally just
removing our panic handler isn't enough. We need to block all fbdev
callbacks when oopsing.

There was already one in the blank handler, but it failed silently.
That makes it impossible for drivers (like i915) who subclass these
functions to figure this out.

Instead consistently return -EBUSY so that everyone knows that we
really don't want to be bothered right now. This also allows us to
remove a pile of FIXMEs from the i915 fbdev code (since due to the
failure code they now won't attempt to grab dangerous locks any more).

Cc: Dave Airlie <airlied@gmail.com>
Cc: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/fb_cma_helper: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:20 +0000 (14:58 +0530)] 
drm/fb_cma_helper: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/udl: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:16 +0000 (14:58 +0530)] 
drm/udl: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v2:
- remove unused variable device in udlfb_create

Cc: David Airlie <airlied@linux.ie>
Cc: Haixia Shi <hshi@chromium.org>
Cc: "Stéphane Marchesin" <marcheu@chromium.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/qxl: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:13 +0000 (14:58 +0530)] 
drm/qxl: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: David Airlie <airlied@linux.ie>
Cc: Frediano Ziglio <fziglio@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
8 years agodrm/gma500: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:10 +0000 (14:58 +0530)] 
drm/gma500: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v2:
- removed unused variable 'device' in psbfb_create

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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