| Message ID | 20230524114233.RESEND.v4.2.I424e840ae6de3cdbd67394cf4efd24534f6434ba@changeid (mailing list archive) |
|---|---|
| Headers | show |
| Series | Fix Goodix touchscreen power leakage for MT8186 boards | expand |
Hi Jiri On Tue, May 23, 2023 at 8:45 PM Fei Shao <fshao@chromium.org> wrote: > > These changes are based on the series in [1], which modified the > i2c-hid-of-goodix driver and removed the workaround for a power leakage > issue, so the issue revisits on Mediatek MT8186 boards (Steelix). > > The root cause is that the touchscreen can be powered in different ways > depending on the hardware designs, and it's not as easy to come up with > a solution that is both simple and elegant for all the known designs. > > To address the issue, I ended up adding a new boolean property for the > driver so that we can control the power up/down sequence depending on > that. > > Adding a new property might not be the cleanest approach for this, but > at least the intention would be easy enough to understand, and it > introduces relatively small change to the code and fully preserves the > original control flow. > > [1] https://lore.kernel.org/all/20230207024816.525938-1-dianders@chromium.org/ > > Changes in v4: > - Rebase on top of next-20230523 > - Collect the review tags > - Minor coding style improvement > > Changes in v3: > - In power-down, only skip the GPIO but not the regulator calls if the > flag is set > > Changes in v2: > - Use a more accurate property name and with "goodix," prefix > - Drop the change to regulator_enable logic during power-up > > Fei Shao (2): > dt-bindings: input: goodix: Add "goodix,no-reset-during-suspend" > property > HID: i2c-hid: goodix: Add support for "goodix,no-reset-during-suspend" > property > > .../bindings/input/goodix,gt7375p.yaml | 9 +++++++++ > drivers/hid/i2c-hid/i2c-hid-of-goodix.c | 16 +++++++++++++++- > 2 files changed, 24 insertions(+), 1 deletion(-) Just confirming that you're good to land these two patches as discussed previously [1]. Thanks! :-) [1] https://lore.kernel.org/r/nycvar.YFH.7.76.2305231510270.29760@cbobk.fhfr.pm
On Wed, 24 May 2023, Fei Shao wrote: > These changes are based on the series in [1], which modified the > i2c-hid-of-goodix driver and removed the workaround for a power leakage > issue, so the issue revisits on Mediatek MT8186 boards (Steelix). > > The root cause is that the touchscreen can be powered in different ways > depending on the hardware designs, and it's not as easy to come up with > a solution that is both simple and elegant for all the known designs. > > To address the issue, I ended up adding a new boolean property for the > driver so that we can control the power up/down sequence depending on > that. > > Adding a new property might not be the cleanest approach for this, but > at least the intention would be easy enough to understand, and it > introduces relatively small change to the code and fully preserves the > original control flow. Please apologize the delay. Now applied.
These changes are based on the series in [1], which modified the i2c-hid-of-goodix driver and removed the workaround for a power leakage issue, so the issue revisits on Mediatek MT8186 boards (Steelix). The root cause is that the touchscreen can be powered in different ways depending on the hardware designs, and it's not as easy to come up with a solution that is both simple and elegant for all the known designs. To address the issue, I ended up adding a new boolean property for the driver so that we can control the power up/down sequence depending on that. Adding a new property might not be the cleanest approach for this, but at least the intention would be easy enough to understand, and it introduces relatively small change to the code and fully preserves the original control flow. [1] https://lore.kernel.org/all/20230207024816.525938-1-dianders@chromium.org/ Changes in v4: - Rebase on top of next-20230523 - Collect the review tags - Minor coding style improvement Changes in v3: - In power-down, only skip the GPIO but not the regulator calls if the flag is set Changes in v2: - Use a more accurate property name and with "goodix," prefix - Drop the change to regulator_enable logic during power-up Fei Shao (2): dt-bindings: input: goodix: Add "goodix,no-reset-during-suspend" property HID: i2c-hid: goodix: Add support for "goodix,no-reset-during-suspend" property .../bindings/input/goodix,gt7375p.yaml | 9 +++++++++ drivers/hid/i2c-hid/i2c-hid-of-goodix.c | 16 +++++++++++++++- 2 files changed, 24 insertions(+), 1 deletion(-)