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Message-ID: <87h6wdxqh5.fsf@collabora.com> Date: Thu, 26 Jan 2023 17:31:02 +0200 From: Adrian Ratiu <adrian.ratiu@...labora.com> To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> Cc: u.kleine-koenig@...gutronix.de, matthias.bgg@...il.com, weiqing.kong@...iatek.com, jitao.shi@...iatek.com, linux-pwm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org, kernel@...labora.com, thierry.reding@...il.com Subject: Re: [PATCH 0/2] pwm: mtk-disp: Fix backlight configuration at boot On Mon, 23 Jan 2023, AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> wrote: > Since the pwm-mtk-disp driver was fixed to get PWM_EN state from > the right register, an old two-wrongs-make-one-right issue > emerged: as a result, MT8192 Asurada Spherion got no backlight > at boot unless a suspend/resume cycle was performed. Also, the > backlight would sometimes not get updated with the requested > value, requiring the user to change it back and forth until it > worked. > > This series fixes both of the aforementioned issues found on > MT8192. Thanks for the series. This also improves backlight on MT8183. I've been testing using the panfrost driver on a ChromiumOS userspace on a jacuzzi board and I've had issues like the screen going blank then not coming back, which these patches appear to solve. Many thanks! Tested-by: Adrian Ratiu <adrian.ratiu@...labora.com> > > AngeloGioacchino Del Regno (2): > pwm: mtk-disp: Disable shadow registers before setting backlight > values > pwm: mtk-disp: Configure double buffering before reading in > .get_state() > > drivers/pwm/pwm-mtk-disp.c | 34 +++++++++++++++++++++++----------- > 1 file changed, 23 insertions(+), 11 deletions(-) > > -- > 2.39.0
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