The atmel-hlcdc driver already supports atomic operations, add the
missing DRM_ATOMIC flag to expose the atomic features to userspace.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
A couple of fixes from the previous pull request as well as gl3 support.
There is one drm core change, an export of a previously private function.
Take 2 implementing screen targets, this time with the fbdev code adjusted
accordingly.
Also there is an implementation of register-driven command buffers, that
overrides the FIFO ring for command processing. It's needed for our upcoming
hardware revision.
* 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux: (35 commits)
drm/vmwgfx: Fix copyright headers
drm/vmwgfx: Add DX query support. Various fixes.
drm/vmwgfx: Add command parser support for a couple of DX commands
drm/vmwgfx: Command parser fixes for DX
drm/vmwgfx: Initial DX support
drm/vmwgfx: Update device includes for DX device functionality
drm: export the DRM permission check code
drm/vmwgfx: Fix crash when unloading vmwgfx v2
drm/vmwgfx: Fix framebuffer creation on older hardware
drm/vmwgfx: Fixed topology boundary checking for Screen Targets
drm/vmwgfx: Fix an uninitialized value
drm/vmwgfx: Fix compiler warning with 32-bit dma_addr_t
drm/vmwgfx: Kill a bunch of sparse warnings
drm/vmwgfx: Fix kms preferred mode sorting
drm/vmwgfx: Reinstate the legacy display system dirty callback
drm/vmwgfx: Implement fbdev on kms v2
drm/vmwgfx: Add a kernel interface to create a framebuffer v2
drm/vmwgfx: Avoid cmdbuf alloc sleeping if !TASK_RUNNING
drm/vmwgfx: Convert screen targets to new helpers v3
drm/vmwgfx: Convert screen objects to the new helpers
...
This introduces support for a couple of new panels and also contains
some work to restructure the directories to get more consistency, to
deal better with more panel and bridge drivers getting added.
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Merge tag 'drm/panel/for-4.3-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/panel: Changes for v4.3-rc1
This introduces support for a couple of new panels and also contains
some work to restructure the directories to get more consistency, to
deal better with more panel and bridge drivers getting added.
* tag 'drm/panel/for-4.3-rc1' of git://anongit.freedesktop.org/tegra/linux:
drm/bridge: Put Kconfig entries in a separate menu
drm/panel: Add support for LG LG4573 480x800 4.3" panel
drm/panel: Add display timing for Okaya RS800480T-7X0GP
of: Add Okaya Electric America vendor prefix
drm/panel: simple: Add support for NEC NL4827HC19-05B 480x272 panel
drm/panel: simple: Add support for AUO B080UAN01
drm/panel: simple: Correct minimum hsync length of the HannStar HSD070PWW1 panel
drm/panel: simple: Add bus format for HannStar HSD070PWW1 LVDS panel
drm/bridge: Add vendor prefixes
drm/panel: Add Samsung prefix to panel drivers
drm/exynos: Remove PTN3460 dependency
There are a bunch of non-critical fixes here that I've collected over
the past few months, but the biggest part is Tegra210 support, in the
DC, DSI and SOR/HDMI drivers.
Also this finally restores DPMS with atomic mode-setting, something
that has been broken since the conversion and which I had originally
expected to take far less longer to fix.
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Merge tag 'drm/tegra/for-4.3-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/tegra: Changes for v4.3-rc1
There are a bunch of non-critical fixes here that I've collected over
the past few months, but the biggest part is Tegra210 support, in the
DC, DSI and SOR/HDMI drivers.
Also this finally restores DPMS with atomic mode-setting, something
that has been broken since the conversion and which I had originally
expected to take far less longer to fix.
* tag 'drm/tegra/for-4.3-rc1' of git://anongit.freedesktop.org/tegra/linux: (41 commits)
drm/tegra: sor: Add HDMI support
drm/tegra: sor: Add Tegra210 eDP support
drm/tegra: dc: Implement atomic DPMS
drm/tegra: sor: Restore DPMS
drm/tegra: dsi: Restore DPMS
drm/tegra: hdmi: Restore DPMS
drm/tegra: rgb: Restore DPMS
drm/tegra: sor: Use DRM debugfs infrastructure for CRC
drm/tegra: sor: Write correct head state registers
drm/tegra: sor: Constify display mode
drm/tegra: sor: Reset the correct debugfs fields
drm/tegra: sor: Set minor after debugfs initialization
drm/tegra: sor: Provide error messages in probe
drm/tegra: sor: Rename registers for consistency
drm/tegra: dpaux: Disable interrupt when detached
drm/tegra: dpaux: Configure pads as I2C by default
drm/tegra: dpaux: Provide error message in probe
drm/tegra: dsi: Add Tegra210 support
drm/tegra: dsi: Add Tegra132 support
drm/tegra: dsi: Add Tegra124 support
...
Summary:
- Clean up HDMI and MIXER parts
- Clean up legacy structures specific to Exynos DRM
. This patch series removes existing exyons_drm_display and
exynos_drm_encoder structures specific to Exynos DRM, and
makes them to replace with common drm_encoder structure.
With cleanup patch, we removes exynos_drm_encoder module.
- Clean up gem, dmabuf and buffer modules
. This patch series replaces existing Exynos DRM dmabuf codes
with common drm prime ones, and embeds all codes of exynos_drm_buf
into exynos_drm_gem module.
With cleanup patch, we removes exynos_drm_buf and exynos_drm_dmabuf
modules.
- And some fixups.
* 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos: (53 commits)
drm/exynos: merge exynos_drm_buf.c to exynos_drm_gem.c
drm/exynos: use prime helpers
drm/exynos: remove function roundup_gem_size
drm/exynos: remove function update_vm_cache_attr
drm/exynos: remove function check_gem_flags
drm/exynos: use ERR_PTR instead of NULL in exynos_drm_gem_init
drm/exynos: remove unused fields of struct exynos_drm_gem_buf
drm/exynos: stop copying sg table
drm/exynos: remove function exynos_drm_gem_map_buf
drm/exynos: remove mutex locking in pagefault handler
drm/exynos: remove function convert_to_vm_err_msg
drm/exynos: stop using sgtable in page fault handler
drm/exynos: remove struct exynos_drm_encoder layer
drm/exynos: fold encoder setup into exynos_drm_load()
drm/exynos: remove exynos_drm_create_enc_conn()
drm/exynos: remove exynos_encoder's .commit() op
drm/exynos: remove extra call to exynos_dp_commit()
drm/exynos: remove extra call to hdmi_commit()
drm/exynos: remove struct exynos_drm_display
drm/exynos: simplify calculation of possible CRTCs
...
1) includes all the drm/msm side of things for upstream kernel working
on dragonboard 410c (still some pending work on adv7533 bridge chip)
2) initial support for msm8x94 (snapdragon 810)
3) support for msm8x74v1 (in addition to existing v2 support)
4) support for dma planes on mdp5 (additional planes that cannot scale/csc)
5) more yuv format support for mdp5 (single plane vyuy/uyvy/yuyv/yvyu,
two plane nv16/nv61, and three plane yuv420/yvu420)
6) rotation support for mdp5
7) initial hdcp support
8) fixes, etc
* 'msm-next' of git://people.freedesktop.org/~robclark/linux: (46 commits)
drm/msm/dsi: Introduce DSI configuration module
drm/msm/dsi: Make each PHY type compilation independent
drm/msm/dsi: Split PHY drivers to separate files
drm/msm/dsi: Return void from msm_dsi_phy_disable()
drm/msm/dsi: Specify bitmask to set source PLL
drm/msm/mdp: Clear pending interrupt status before enable interrupt
drm/msm/mdp5: Add rotation (hflip/vflip) support to MDP5 planes (v2)
drm/msm: add calls to prepare and unprepare panel
drm/msm/dsi: Modify dsi manager bridge ops to work with external bridges
drm/msm/dsi: Allow dsi to connect to an external bridge
drm/msm/dsi: Create a helper to check if there is a connected device
drm/msm/dsi: Refer to connected device as 'device' instead of 'panel'
drm/msm/dsi: Make TE gpio optional
drm/msm: mdp4 lvds: get panel node via of graph parsing
drm/msm: dsi host: Use device graph parsing to parse connected panel
drm/msm: dsi host: add missing of_node_put()
drm/msm: Enable clocks during enable/disable_vblank() callbacks
drm/msm/mdp5: Add support for msm8x74v1
drm/msm/mdp5: Add DMA pipe planes for MDP5
drm/msm/mdp: Add capabilities to MDP planes (v2)
...
Bunch more fixes for 4.3, most of it skl fallout. It's not quite all yet,
there's still a few more patches pending to enable DDI-E correctly on skl.
Also included the dpms atomic work from Maarten since atomic is just a
pain and not including would cause piles of conflicts right from the
start.
* tag 'drm-intel-next-fixes-2015-08-16' of git://anongit.freedesktop.org/drm-intel: (67 commits)
drm/i915: Per-DDI I_boost override
drm/i915/skl: WaIgnoreDDIAStrap is forever, always init DDI A
drm/i915: fix checksum write for automated test reply
drm/i915: Contain the WA_REG macro
drm/i915: Remove the failed context from the fpriv->context_idr
drm/i915: Report IOMMU enabled status for GPU hangs
drm/i915: Check idle to active before processing CSQ
drm/i915: Set alternate aux for DDI-E
drm/i915: Set power domain for DDI-E
drm/i915: fix stolen bios_reserved checks
drm/i915: Use masked write for Context Status Buffer Pointer
drm/i915/skl WaDisableSbeCacheDispatchPortSharing
drm/i915: Spam less on dp aux send/receive problems
drm/i915: Handle return value in intel_pin_and_fence_fb_obj, v2.
drm/i915: Only update mode related state if a modeset happened.
drm/i915: Remove connectors_active.
drm/i915: Remove connectors_active from intel_dp.c, v2.
drm/i915: Remove connectors_active from sanitization, v2.
drm/i915: Get rid of dpms handling.
drm/i915: Make crtc checking use the atomic state, v2.
...
A smallish batch of fixes, a little more than expected this late, but
all fixes are contained to their platforms and seem reasonably low risk:
- A somewhat large SMP fix for ux500 that still seemed warranted to include here
- OMAP DT fixes for pbias regulator specification that broke due to some DT
reshuffling
- PCIe IRQ routing bugfix for i.MX
- Networking fixes for keystone
- Runtime PM for OMAP GPMC
- A couple of error path bug fixes for exynos
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Merge tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC fixes from Olof Johansson:
"A smallish batch of fixes, a little more than expected this late, but
all fixes are contained to their platforms and seem reasonably low
risk:
- a somewhat large SMP fix for ux500 that still seemed warranted to
include here
- OMAP DT fixes for pbias regulator specification that broke due to
some DT reshuffling
- PCIe IRQ routing bugfix for i.MX
- networking fixes for keystone
- runtime PM for OMAP GPMC
- a couple of error path bug fixes for exynos"
* tag 'armsoc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: dts: keystone: Fix the mdio bindings by moving it to soc specific file
ARM: dts: keystone: fix the clock node for mdio
memory: omap-gpmc: Don't try to save uninitialized GPMC context
ARM: imx6: correct i.MX6 PCIe interrupt routing
ARM: ux500: add an SMP enablement type and move cpu nodes
ARM: dts: dra7: Fix broken pbias device creation
ARM: dts: OMAP5: Fix broken pbias device creation
ARM: dts: OMAP4: Fix broken pbias device creation
ARM: dts: omap243x: Fix broken pbias device creation
ARM: EXYNOS: fix double of_node_put() on error path
ARM: EXYNOS: Fix potentian kfree() of ro memory
Pull MIPS bugfix from Ralf Baechle:
"Only a single MIPS fix - the math when invoking syscall_trace_enter
was wrong"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
MIPS: Fix seccomp syscall argument for MIPS64
Merge x86 fixes from Ingo Molnar:
"Two followup fixes related to the previous LDT fix"
Also applied a further FPU emulation fix from Andy Lutomirski to the
branch before actually merging it.
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
x86/ldt: Further fix FPU emulation
x86/ldt: Correct FPU emulation access to LDT
x86/ldt: Correct LDT access in single stepping logic
fuse_dev_ioctl() performed fuse_get_dev() on a user-supplied fd,
leading to a type confusion issue. Fix it by checking file->f_op.
Signed-off-by: Jann Horn <jann@thejh.net>
Acked-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
These are necessary to get the NIC card working on all Keystone
EVMs. Couple of boards are nroken without these two fixes.
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Merge tag 'keystone-dts-late-fixes-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into fixes
ARM: Couple of Keysyone MDIO DTS fixes for 4.2-rc6+
These are necessary to get the NIC card working on all Keystone
EVMs. Couple of boards are broken without these two fixes.
* tag 'keystone-dts-late-fixes-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
ARM: dts: keystone: Fix the mdio bindings by moving it to soc specific file
ARM: dts: keystone: fix the clock node for mdio
Signed-off-by: Olof Johansson <olof@lixom.net>
Commit 4c21b8fd8f ("MIPS: seccomp: Handle indirect system calls (o32)")
fixed indirect system calls on O32 but it also introduced a bug for MIPS64
where it erroneously modified the v0 (syscall) register with the assumption
that the sycall offset hasn't been taken into consideration. This breaks
seccomp on MIPS64 n64 and n32 ABIs. We fix this by replacing the addition
with a move instruction.
Fixes: 4c21b8fd8f ("MIPS: seccomp: Handle indirect system calls (o32)")
Cc: <stable@vger.kernel.org> # 3.15+
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10951/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
The struct exynos_drm_gem_obj can have fields of the struct
exynos_drm_gem_buf then don't need to use exynos_drm_buf.c file.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The dma-buf codes of exynos drm is almost same with prime helpers. A
difference is that consider DMA_NONE when import dma-buf, but it's wrong
and we don't consider it any more, so we can use prime interface.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The function roundup_gem_size can be merged in exynos_drm_gem_create.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The function update_vm_cache_attr can be merged in exynos_drm_gem_mmap.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The function check_gem_flags is too simple, so it's better to move codes
in each consumer functions.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The userptr, write and pfnmap of struct exynos_drm_gem_buf are not used
anywhere.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Already struct exynos_drm_gem_buf has pages of the buffer, so we don't
need to copy from sg table of the buffer to sg table of dma-buf
attachment, just can make sg table from pages of the buffer.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The exynos_drm_gem_map_buf can be merged in exynos_drm_gem_fault.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
There is no reason to use mutex locking in pagefault handler.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The convert_to_vm_err_msg is called just once by exynos_drm_gem_fault,
so it's simple not to use the function.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Already struct exynos_drm_gem_buf has pages of the buffer when buffer is
created, so just can use pages in page fault handler, we don't have to
make sgtable of the buffer. But this needs to construct pages of the
buffer that is imported from dma-buf prime.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
struct exynos_drm_encoder was justing wrapping struct drm_encoder, it had
only a drm_encoder member and the internal exynos_drm_encoders ops that
was directly mapped to the drm_encoder helper funcs.
So now exynos DRM uses struct drm_encoder directly, this removes
completely the struct exynos_drm_encoder.
v2: add empty .mode_fixup() and .mode_set() to DSI and DPI to avoid null
pointer.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
As we are removing the exynos encoder move the encoder setup operation
directly inside the exynos_drm_load()
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This functions was just hiding the encoder and connector creation in
a way that was less clean than if we get rid of it. For example,
exynos_encoder ops had .create_connector() defined only because we were
handing off the encoder and connector creation to
exynos_drm_create_enc_conn(). Without this function we can directly call
the create_connector function internally in the code, without the need of
any vtable access.
It also does some refactoring in the code like creating a bind function
for dpi devices.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
.commit() is not used anymore, Exynos encoders now follow the
.enable()/.disable() semantics from drm atomic core, so remove this
callback.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
exynos_dp_commit() was getting called twice by exynos encoder core, once
inside the .enable() call and another time by .commit() itself.
The remove of the second call caused the wake of a bug, the operations
orders inside exynos_dp_commit was wrong and we had to move
exynos_dp_start_video() to be the last operation in there.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
hdmi_commit() was getting called twice by exynos encoder core, once inside
the .enable() call and another time by .commit() itself.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This struct was just representing encoder information, it was a member of
struct exynos_drm_encoder, so any code trying to access encoder data would
have to go through the encoder struct, get the display struct and then get
the data it want.
During this patchset we also realized that the only data
exynos_drm_encoder needs to store is the drm_encoder parent and the
exynos_drm_encoder_ops.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
All CRTCs can only be LCD, HDMI or VIDI, so basically all CRTCs will be a
possible CRTCs. This patch removes an extra function with switch that was
only checking if the CRTC type was one of those three above.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
These two display_ops are not used anywhere, remove them.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
phy_power_on() and phy_power_off() already checks for NULL pointer.
This patch removes the wrappers exynos_dp_phy_init() and
exynos_dp_phy_exit() since the only think they were doing was a check for
NULL phy.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The DRM Core doesn't have a dpms() operation anymore, everything
now is enable() or disable().
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Instead of blindly ignore the return value of enable_vblank return it
to the upper DRM layer for error handling.
Suggested-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Rename crtc_{widht,height} to crtc_{w,h} and src_{width,height} to
src_{w,h} to make it similar to the atomic state names.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Now after the move to use drm_plane_state directly struct drm_plane_state
has many unused fields, along with others that weren't used before the
plane state change. Thus remove them all.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
For some fields the use of struct exynos_drm_plane filled with data from
the plane state just creates a source of duplicated information and
overhead. Here we change the crtc drivers to access the plane state
directly simplifying the code by not relying on a exynos internal struct.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
We already have the plane pointer in before calling .update_plane() or
disable_plane() so pass it directly to those calls avoiding a new
conversion from zpos to struct exynos_drm_plane.
v2: don't remove check for suspended in FIMD (comment by Joonyoung)
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
The same check is placed twice in fimd/decon_update_plane(), remove
one of them.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Get rid of legacy DRM vblank function that are less clear to use.
The new ones basically requires only the crtc as parameters.
It also clean ups exynos_drm_crtc_finish_pageflip() parameters as a
consequence.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Instead of giving -1 to as arg to drm_send_vblank_event() pass the
correct pipe number to it.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This is simplest solution about reported problem[1]. It's no problem to
clear channel only when iommu is enabled, if we consider that we cannot
recognize iommu errors when iommu is disabled and it have been valid
until now. But this cannot be nice solution.
[1] https://lkml.org/lkml/2015/7/21/404
Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
