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Message-ID: <06909bd8-3da2-1cf0-82ac-3ed4f3e63def@collabora.com> Date: Wed, 8 Mar 2023 12:46:07 +0100 From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> To: thierry.reding@...il.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, Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: Re: [PATCH 0/2] pwm: mtk-disp: Fix backlight configuration at boot Il 23/02/23 15:16, AngeloGioacchino Del Regno ha scritto: > Il 23/01/23 17:06, AngeloGioacchino Del Regno ha scritto: >> 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. >> >> 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(-) >> > > Gentle ping for this one: this is fixing backlight issues on multiple MediaTek > SoCs and was well tested. > > Thanks, > Angelo Since this series was sent more than one month ago, and since this fixes broken backlight on a number of Chromebooks with MT8183 and MT8192 SoCs, and seen the urgency of getting these fixes in, I'm adding Greg to the loop. Regards, Angelo
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