From: Johan Hovold <johan@kernel.org>
To: Sasha Levin <sashal@kernel.org>
Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org,
Bjorn Andersson <quic_bjorande@quicinc.com>,
Kuogee Hsieh <quic_khsieh@quicinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
robdclark@gmail.com, quic_abhinavk@quicinc.com,
airlied@gmail.com, daniel@ffwll.ch, swboyd@chromium.org,
johan+linaro@kernel.org, quic_sbillaka@quicinc.com,
linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org
Subject: Re: [PATCH AUTOSEL 6.1 18/58] drm/msm/dp: Remove INIT_SETUP delay
Date: Mon, 27 Feb 2023 10:12:42 +0100 [thread overview]
Message-ID: <Y/x0CpMmNV6pJlZB@hovoldconsulting.com> (raw)
In-Reply-To: <20230227020457.1048737-18-sashal@kernel.org>
On Sun, Feb 26, 2023 at 09:04:16PM -0500, Sasha Levin wrote:
> From: Bjorn Andersson <quic_bjorande@quicinc.com>
>
> [ Upstream commit e17af1c9d861dc177e5b56009bd4f71ace688d97 ]
>
> During initalization of the DisplayPort controller an EV_HPD_INIT_SETUP
> event is generated, but with a delay of 100 units. This delay existed to
> circumvent bug in the QMP combo PHY driver, where if the DP part was
> powered up before USB, the common properties would not be properly
> initialized - and USB wouldn't work.
>
> This issue was resolved in the recent refactoring of the QMP driver,
> so it's now possible to remove this delay.
>
> While there is still a timing dependency in the current implementation,
> test indicates that it's now possible to boot with an external display
> on USB Type-C and have the display power up, without disconnecting and
> reconnecting the cable.
>
> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> Patchwork: https://patchwork.freedesktop.org/patch/518729/
> Link: https://lore.kernel.org/r/20230117172951.2748456-1-quic_bjorande@quicinc.com
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
This is not a bug fix and should not be backported.
Johan
next prev parent reply other threads:[~2023-02-27 9:17 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-27 2:03 [PATCH AUTOSEL 6.1 01/58] drm: panel-orientation-quirks: Add quirk for Lenovo Yoga Tab 3 X90F Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 02/58] drm: panel-orientation-quirks: Add quirk for DynaBook K50 Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 03/58] drm/amd/display: Reduce expected sdp bandwidth for dcn321 Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 04/58] drm/amd/display: Revert Reduce delay when sink device not able to ACK 00340h write Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 05/58] drm/amd/display: Fix potential null-deref in dm_resume Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 06/58] drm/omap: dsi: Fix excessive stack usage Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 07/58] HID: Add Mapping for System Microphone Mute Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 08/58] drm/tiny: ili9486: Do not assume 8-bit only SPI controllers Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 09/58] drm/amd/display: Defer DIG FIFO disable after VID stream enable Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 10/58] drm/radeon: free iio for atombios when driver shutdown Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 11/58] drm/amd: Avoid BUG() for case of SRIOV missing IP version Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 12/58] drm/amdkfd: Page aligned memory reserve size Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 13/58] scsi: lpfc: Fix use-after-free KFENCE violation during sysfs firmware write Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 14/58] Revert "fbcon: don't lose the console font across generic->chip driver switch" Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 15/58] drm/amd: Avoid ASSERT for some message failures Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 16/58] drm: amd: display: Fix memory leakage Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 17/58] drm/amd/display: fix mapping to non-allocated address Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 18/58] drm/msm/dp: Remove INIT_SETUP delay Sasha Levin
2023-02-27 9:12 ` Johan Hovold [this message]
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 19/58] HID: uclogic: Add frame type quirk Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 20/58] HID: uclogic: Add battery quirk Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 21/58] HID: uclogic: Add support for XP-PEN Deco Pro SW Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 22/58] HID: uclogic: Add support for XP-PEN Deco Pro MW Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 23/58] HID: multitouch: Add quirks for flipped axes Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 24/58] drm/msm/dsi: Add missing check for alloc_ordered_workqueue Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 25/58] drm: rcar-du: Add quirk for H3 ES1.x pclk workaround Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 26/58] drm: rcar-du: Fix setting a reserved bit in DPLLCR Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 27/58] drm/drm_print: correct format problem Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 28/58] drm/amd/display: Set hvm_enabled flag for S/G mode Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 29/58] habanalabs: extend fatal messages to contain PCI info Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 30/58] habanalabs: fix bug in timestamps registration code Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 31/58] docs/scripts/gdb: add necessary make scripts_gdb step Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 32/58] drm/msm/dpu: Add DSC hardware blocks to register snapshot Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 33/58] ASoC: soc-compress: Reposition and add pcm_mutex Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 34/58] ASoC: kirkwood: Iterate over array indexes instead of using pointer math Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 35/58] regulator: max77802: Bounds check regulator id against opmode Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 36/58] regulator: s5m8767: Bounds check id indexing into arrays Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 37/58] Revert "drm/amdgpu: TA unload messages are not actually sent to psp when amdgpu is uninstalled" Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 38/58] drm/amd/display: fix FCLK pstate change underflow Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 39/58] gfs2: Improve gfs2_make_fs_rw error handling Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 40/58] hwmon: (coretemp) Simplify platform device handling Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 41/58] hwmon: (nct6775) Directly call ASUS ACPI WMI method Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 42/58] hwmon: (nct6775) B650/B660/X670 ASUS boards support Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 43/58] pinctrl: at91: use devm_kasprintf() to avoid potential leaks Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 44/58] drm/amd/display: Do not set DRR on pipe commit Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 45/58] drm/amd/display: Do not commit pipe when updating DRR Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 46/58] scsi: snic: Fix memory leak with using debugfs_lookup() Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 47/58] scsi: ufs: core: Fix device management cmd timeout flow Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 48/58] HID: logitech-hidpp: Don't restart communication if not necessary Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 49/58] drm/amd/display: Move DCN314 DOMAIN power control to DMCUB Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 50/58] drm/amd/display: Enable P-state validation checks for DCN314 Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 51/58] drm: panel-orientation-quirks: Add quirk for Lenovo IdeaPad Duet 3 10IGL5 Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 52/58] drm/amd/display: Disable HUBP/DPP PG on DCN314 for now Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 53/58] dm thin: add cond_resched() to various workqueue loops Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 54/58] dm cache: " Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 55/58] nfsd: zero out pointers after putting nfsd_files on COPY setup error Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 56/58] nfsd: clean up potential nfsd_file refcount leaks in COPY codepath Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 57/58] nfsd: don't hand out delegation on setuid files being opened for write Sasha Levin
2023-02-27 2:04 ` [PATCH AUTOSEL 6.1 58/58] cifs: prevent data race in smb2_reconnect() Sasha Levin
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