Before the introduction of the wait_hpd_asserted() callback in
commit 841d742f09 ("drm/dp: Add wait_hpd_asserted() callback to struct
drm_dp_aux") the API between panel drivers and DP AUX bus drivers was
that it was up to the AUX bus driver to wait for HPD in the transfer()
function.
Now wait_hpd_asserted() has been added. The two panel drivers that are
DP AUX endpoints use it. See commit 2327b13d6c ("drm/panel-edp: Take
advantage of wait_hpd_asserted() in struct drm_dp_aux") and
commit 3b5765df37 ("drm/panel: atna33xc20: Take advantage of
wait_hpd_asserted() in struct drm_dp_aux"). We've implemented
wait_hpd_asserted() in the MSM DP driver as of commit e2969ee302
("drm/msm/dp: move of_dp_aux_populate_bus() to eDP probe()"). There is
no longer any reason for long wait in the AUX transfer() function.
Remove it.
NOTE: the wait_hpd_asserted() is listed as "optional". That means it's
optional for the DP AUX bus to implement. In the case of the MSM DP
driver we implement it so we can assume it will be called.
ALSO NOTE: the wait wasn't actually _hurting_ anything and wasn't even
causing long timeouts, but it's still nice to get rid of unneeded
code. Specificaly it's not truly needed because to handle other DP
drivers that can't power on as quickly (specifically parade-ps8640) we
already avoid DP AUX transfers for eDP panels that aren't powered
on. See commit 8df1ddb5bf ("drm/dp: Don't attempt AUX transfers when
eDP panels are not powered").
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/583130/
Link: https://lore.kernel.org/r/20240315143621.v2.3.I535606f6d4f7e3e5588bb75c55996f61980183cd@changeid
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Linux 6.9-rc5
I've had a persistent msm failure on clang, and the fix is in fixes
so just pull it back to fix that.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Fixes for v6.9
Display:
- Fixes for PM refcount leak when DP goes to disconnected state and
also when link training fails. This is also one of the issues found
with the pm runtime series
- Add missing newlines to prints in msm_fb and msm_kms
- Change permissions of some dpu debugfs entries which write to const
data from catalog to read-only to avoid protection faults
- Fix the interface table for the catalog of X1E80100. This is an
important fix to bringup DP for X1E80100.
- Logging fix to print the callback symbol in the invalid IRQ message
case rather than printing when its known to be NULL.
- Bindings fix to add DP node as child of mdss for mdss node
- Minor typo fix in DP driver API which handles port status change
GPU:
- fix CHRASHDUMP_READ()
- fix HHB (highest bank bit) for a619 to fix UBWC corruption
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGvFwRUcHGWva7oDeydq1PTiZMduuykCD2MWaFrT4iMGZA@mail.gmail.com
As documented in the description of the transfer() function of
"struct drm_dp_aux", the transfer() function can be called at any time
regardless of the state of the DP port. Specifically if the kernel has
the DP AUX character device enabled and userspace accesses
"/dev/drm_dp_auxN" directly then the AUX transfer function will be
called regardless of whether a DP device is connected.
For eDP panels we have a special rule where we wait (with a 5 second
timeout) for HPD to go high. This rule was important before all panels
drivers were converted to call wait_hpd_asserted() and actually can be
removed in a future commit.
For external DP devices we never checked for HPD. That means that
trying to access the DP AUX character device (AKA `hexdump -C
/dev/drm_dp_auxN`) would very, very slowly timeout. Specifically on my
system:
$ time hexdump -C /dev/drm_dp_aux0
hexdump: /dev/drm_dp_aux0: Connection timed out
real 0m8.200s
We want access to the drm_dp_auxN character device to fail faster than
8 seconds when no DP cable is plugged in.
Let's add a test to make transfers fail right away if a device isn't
plugged in. Rather than testing the HPD line directly, we have the
dp_display module tell us when AUX transfers should be enabled so we
can handle cases where HPD is signaled out of band like with Type C.
Fixes: c943b4948b ("drm/msm/dp: add displayPort driver support")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/583127/
Link: https://lore.kernel.org/r/20240315143621.v2.1.I16aff881c9fe82b5e0fc06ca312da017aa7b5b3e@changeid
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Merge DisplayPort subnode API in order to allow DisplayPort driver to
configure the PHYs either to the DP or eDP mode, depending on hardware
configuration.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
The default highest_bank_bit of 15 didn't seem to cause issues so far
but downstream defines it to be 14. But similar to [0] leaving it on 14
(or 15 for that matter) causes some corruption issues with some
resolutions with DisplayPort, like 1920x1200.
So set it to 13 for now so that there's no screen corruption.
[0] commit 6a0dbcd20e ("drm/msm/a6xx: set highest_bank_bit to 13 for a610")
Fixes: b7616b5c69 ("drm/msm/adreno: Add A619 support")
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Patchwork: https://patchwork.freedesktop.org/patch/585215/
Signed-off-by: Rob Clark <robdclark@chromium.org>
Two misc-next in one.
drm-misc-next for v6.10-rc1:
The deal of a lifetime! You get ALL of the previous
drm-misc-next-2024-03-21-1 tag!!
But WAIT, there's MORE!
Cross-subsystem Changes:
- Assorted DT binding updates.
Core Changes:
- Clarify how optional wait_hpd_asserted is.
- Shuffle Kconfig names around.
Driver Changes:
- Assorted build fixes for panthor, imagination,
- Add AUO B120XAN01.0 panels.
- Assorted small fixes to panthor, panfrost.
drm-misc-next for v6.10:
UAPI Changes:
- Move some nouveau magic constants to uapi.
Cross-subsystem Changes:
- Move drm-misc to gitlab and freedesktop hosting.
- Add entries for panfrost.
Core Changes:
- Improve placement for TTM bo's in idle/busy handling.
- Improve drm/bridge init ordering.
- Add CONFIG_DRM_WERROR, and use W=1 for drm.
- Assorted documentation updates.
- Make more (drm and driver) headers self-contained and add header
guards.
- Grab reservation lock in pin/unpin callbacks.
- Fix reservation lock handling for vmap.
- Add edp and edid panel matching, use it to fix a nearly identical
panel.
Driver Changes:
- Add drm/panthor driver and assorted fixes.
- Assorted small fixes to xlnx, panel-edp, tidss, ci, nouveau,
panel and bridge drivers.
- Add Samsung s6e3fa7, BOE NT116WHM-N44, CMN N116BCA-EA1,
CrystalClear CMT430B19N00, Startek KD050HDFIA020-C020A,
powertip PH128800T006-ZHC01 panels.
- Fix console for omapdrm.
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/bea310a6-6ff6-477e-9363-f9f053cfd12a@linux.intel.com
Most of our helpers have relied on being selected so far through
Kconfig, but that creates issues when we have multiple layers of helpers
with some depending on others.
Indeed, select doesn't select a dependency's dependencies, and thus
isn't super intuitive. Depends on however doesn't have that limitation,
so we can just switch all the drivers that were selecting
DRM_DISPLAY_DP_HELPER to depend on it.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20240327-kms-kconfig-helpers-v3-10-eafee11b84b3@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Most of our helpers have relied on being selected so far through
Kconfig, but that creates issues when we have multiple layers of helpers
with some depending on others.
Indeed, select doesn't select a dependency's dependencies, and thus
isn't super intuitive. Depends on however doesn't have that limitation,
so we can just switch all the drivers that were selecting
DRM_DISPLAY_DP_AUX_BUS to depend on it.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20240327-kms-kconfig-helpers-v3-9-eafee11b84b3@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Most of our helpers have relied on being selected so far through
Kconfig, but that creates issues when we have multiple layers of helpers
with some depending on others.
Indeed, select doesn't select a dependency's dependencies, and thus
isn't super intuitive. Depends on however doesn't have that limitation,
so we can just switch all the drivers that were selecting
DRM_DISPLAY_HELPER to depend on it.
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20240327-kms-kconfig-helpers-v3-8-eafee11b84b3@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
