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Add support for regular DisplayPort on Tegra210 and Tegra186.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The SOR found on Tegra SoCs does not support all the rates potentially
advertised by eDP 1.4. Make sure that the rates that are not supported
are filtered out.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Rework eDP code to correspond more closely to what's documented. This
also improves the reliability of modesets.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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This is necessary for the output abstraction to retrieve a list of valid
modes from the EDID of a connected panel/monitor. This will be useful in
conjunction with DisplayPort support that will be added in a subsequent
patch, so that the driver can read EDID via the AUX channel.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Make use of the DP link training helpers to implement full and fast link
training. While at it, refactor some of the code and remove various code
sequences that are not necessary.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Add a helper that will perform link training as described in the
DisplayPort specification.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Parses additional link rates from DPCD if the sink supports eDP 1.4.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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This helper chooses an appropriate configuration, according to the
bitrate requirements of the video mode and the capabilities of the
DisplayPort sink.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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If the sink is eDP and supports the alternate scrambler reset, enable
it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Make use of ANSI 8B/10B channel coding if the DisplayPort sink supports
it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Store the AUX read interval from DPCD, so that it can be used to wait
for the durations given in the specification during link training.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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If the sink supports eDP, read the eDP revision from it's DPCD.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Parse from the sink capabilities whether or not the eDP alternate
scrambler reset value of 0xfffe is supported.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Parse from the sink capabilities whether or not it supports ANSI 8B/10B
channel coding as specified in ANSI X3.230-1994, clause 11.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The TPS3 capability can be exposed by DP 1.2 and later sinks if they
support the alternative training pattern for channel equalization.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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While probing the DisplayPort link, query the fast training capability.
If supported, drivers can use the fast link training sequence instead of
the more involved full link training sequence.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Use existing parsing helpers to probe a DisplayPort link.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Rather than storing capabilities as flags in an integer, use a separate
boolean per capability. This simplifies the code that checks for these
capabilities.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Store capabilities in max_* fields and add separate fields for the
currently selected settings.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Subsequent patches will add non-volatile fields to struct drm_dp_link,
so introduce a function to zero out only the volatile fields.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The drm_dp_link structure tracks capabilities on the DP link. Add some
kerneldoc to explain what each of its fields means.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The CMH, DRVZ and DRVI values vary depending on the SoC generation. Move
them into SoC specific structures so that DT compatible string matching
can be used to select the right parameters and write them to hardware at
the right time.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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In order to properly make the VDD supply optional, all accesses to the
regulator need to be ignored, because the regulator core doesn't treat
NULL special.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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When a transfer didn't complete transmission of the requested number of
bytes, signal that the transaction should be retried.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The dpaux driver has a quirk built-in that will delay initialization of
the display driver for a short while, trying to detect an eDP panel. The
reason for this quirk is that the panel may not report as connected
until after the display driver has initialized, at which point the fbdev
emulation will have fallen back to 1024x768 as default resolution, which
will likely not be the eDP panel's native resolution.
With upcoming DisplayPort support, the code needs to be able to cope
with hotpluggable monitors as well. Waiting for a panel to show up is no
longer going to work because the monitor may not be attached on boot. If
the output runs in DisplayPort mode, skip waiting for the panel to show
up.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Instead of manually creating the SG table for a discontiguous buffer,
use the existing sg_alloc_table_from_pages(). Note that this is not safe
to be used with the ARM DMA/IOMMU integration code because that will not
ensure that the whole buffer is mapped contiguously. Depending on the
size of the individual entries the mapping may end up containing holes
to ensure alignment.
However, we only ever use these buffers with explicit IOMMU API usage
and know how to avoid these holes.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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When an importer wants to map a DMA-BUF, make sure to always actually
map it, irrespective of whether the buffer is contiguous or not.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Rather than manually creating an SG table in an incorrect way, let the
standard dma_get_sgtable() function do it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The address can refer to either physical memory or IO virtual memory.
If referring to IO virtual memory, there will always be an associated
physical memory address. Rename this variable to "iova" to clarify in
all cases that this is the IO virtual memory, which in the absence of
an IOMMU is identical to the physical address.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Handling of the IOMMU group attachment is common to all clients, so move
the group into the client to simplify code.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Reuse common code to attach to or detach from an IOMMU domain.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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VIC, just like all other host1x clients, has the same addressing range
as its parent host1x device. Inherit the DMA mask to reflect that.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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If VIC is not behind an IOMMU, don't touch any of the registers related
to stream ID programming.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The driver-specific messages should use the DRM_UT_DRIVER category so
that they can be properly filtered.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The display controllers and VIC don't have any limitations on the
DMA segment size. Inherit the DMA parameters from the parent device,
which also doesn't have any such limitations.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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The host1x_cdma_wait_pushbuffer_space() function is not declared or
directly called from outside the file it is in, so make it static.
Fixes the following sparse warning:
drivers/gpu/host1x/cdma.c:235:5: warning: symbol 'host1x_cdma_wait_pushbuffer_space' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
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A struct device doesn't carry much information that a channel might be
interested in, but the client very much does. Request channels for the
clients rather than their parent devices and store a pointer to them
in order to have that information available when needed.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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It's technically not required to explicitly initialize the fields that
will be zero by default, but it's easier to read these structures if
they are all initialized uniformly.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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Signed-off-by: Thierry Reding <treding@nvidia.com>
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host1x nor any its clients have any limitations on the DMA segment size,
so don't pretend that they do.
Signed-off-by: Thierry Reding <treding@nvidia.com>
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As per POSIX, the correct spelling of the error code is EACCES:
include/uapi/asm-generic/errno-base.h:#define EACCES 13 /* Permission denied */
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Kosina <trivial@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: https://lkml.kernel.org/r/20191024122904.12463-1-geert+renesas@glider.be
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The events in the same group don't start or stop simultaneously.
Here is the ftrace when enabling event group for uncore_iio_0:
# perf stat -e "{uncore_iio_0/event=0x1/,uncore_iio_0/event=0xe/}"
<idle>-0 [000] d.h. 8959.064832: read_msr: a41, value
b2b0b030 //Read counter reg of IIO unit0 counter0
<idle>-0 [000] d.h. 8959.064835: write_msr: a48, value
400001 //Write Ctrl reg of IIO unit0 counter0 to enable
counter0. <------ Although counter0 is enabled, Unit Ctrl is still
freezed. Nothing will count. We are still good here.
<idle>-0 [000] d.h. 8959.064836: read_msr: a40, value
30100 //Read Unit Ctrl reg of IIO unit0
<idle>-0 [000] d.h. 8959.064838: write_msr: a40, value
30000 //Write Unit Ctrl reg of IIO unit0 to enable all
counters in the unit by clear Freeze bit <------Unit0 is un-freezed.
Counter0 has been enabled. Now it starts counting. But counter1 has not
been enabled yet. The issue starts here.
<idle>-0 [000] d.h. 8959.064846: read_msr: a42, value 0
//Read counter reg of IIO unit0 counter1
<idle>-0 [000] d.h. 8959.064847: write_msr: a49, value
40000e //Write Ctrl reg of IIO unit0 counter1 to enable
counter1. <------ Now, counter1 just starts to count. Counter0 has
been running for a while.
Current code un-freezes the Unit Ctrl right after the first counter is
enabled. The subsequent group events always loses some counter values.
Implement pmu_enable and pmu_disable support for uncore, which can help
to batch hardware accesses.
No one uses uncore_enable_box and uncore_disable_box. Remove them.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-drivers-review@eclists.intel.com
Cc: linux-perf@eclists.intel.com
Fixes: 087bfbb03269 ("perf/x86: Add generic Intel uncore PMU support")
Link: https://lkml.kernel.org/r/1572014593-31591-1-git-send-email-kan.liang@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This saves us writing the IBS control MSR twice when disabling the
event.
I searched revision guides for all families since 10h, and did not
find occurrence of erratum #420, nor anything remotely similar:
so we isolate the secondary MSR write to family 10h only.
Also unconditionally update the count mask for IBS Op implementations
that have read & writeable current count (CurCnt) fields in addition
to the MaxCnt field. These bits were reserved on prior
implementations, and therefore shouldn't have negative impact.
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: c9574fe0bdb9 ("perf/x86-ibs: Implement workaround for IBS erratum #420")
Link: https://lkml.kernel.org/r/20191023150955.30292-2-kim.phillips@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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RIP validity
The loop that reads all the IBS MSRs into *buf stopped one MSR short of
reading the IbsOpData register, which contains the RipInvalid status bit.
Fix the offset_max assignment so the MSR gets read, so the RIP invalid
evaluation is based on what the IBS h/w output, instead of what was
left in memory.
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Fixes: d47e8238cd76 ("perf/x86-ibs: Take instruction pointer from ibs sample")
Link: https://lkml.kernel.org/r/20191023150955.30292-1-kim.phillips@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Commit:
1a5941312414c ("perf: Add wakeup watermark control to the AUX area")
added attr.__reserved_2 padding, but forgot to add an ABI check to reject
attributes with this field set. Fix that.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: adrian.hunter@intel.com
Cc: mathieu.poirier@linaro.org
Link: https://lkml.kernel.org/r/20191025121636.75182-1-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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During cpu frequency switching the main "CLK_ARM" is reparented to an
intermediate "step" clock. On imx8mm and imx8mn the 24M oscillator is
used for this purpose but it is extremely slow, increasing wakeup
latencies to the point that i2c transactions can timeout and system
becomes unresponsive.
Fix by switching the "step" clk to SYS_PLL1_800M, matching the behavior
of imx8m cpufreq drivers in imx vendor tree.
This bug was not immediately apparent because upstream arm64 defconfig
uses the "performance" governor by default so no cpufreq transitions
happen.
Fixes: ba5625c3e272 ("clk: imx: Add clock driver support for imx8mm")
Fixes: 96d6392b54db ("clk: imx: Add support for i.MX8MN clock driver")
Cc: stable@vger.kernel.org
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Link: https://lkml.kernel.org/r/f5d2b9c53f1ed5ccb1dd3c6624f56759d92e1689.1571771777.git.leonard.crestez@nxp.com
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The TODO item is misleading and makes it seem as if fbdev emulation
cannot be used with SHMEM. Rephrase the text to describe the current
situation more correctly.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191025092759.13069-3-tzimmermann@suse.de
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There are no users of drm_fb_helper_defio_init(), so we can remove
it. The documentation around defio support is a bit misleading and
should mention compatibility issues with SHMEM helpers. Clarify this.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191025092759.13069-2-tzimmermann@suse.de
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We want to copy from iov to buf, so the direction was wrong.
Note: no real user for the helper, but it will be used by future
features.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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The 'work' field was introduced with commit 06a8fc78367d0
("VSOCK: Introduce virtio_vsock_common.ko")
but it is never used in the code, so we can remove it to save
memory allocated in the per-packet 'struct virtio_vsock_pkt'
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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