Messages in this thread Patch in this message | | | From | Kai-Heng Feng <> | Subject | [PATCH] drm/i915: Force DPCD backlight mode for HP CML 2020 system | Date | Tue, 7 Apr 2020 15:53:53 +0800 |
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There's another Samsung OLED panel needs to use DPCD aux interface to control backlight.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> --- drivers/gpu/drm/drm_dp_helper.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index c6fbe6e6bc9d..d0cfee3b7a65 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -1299,6 +1299,8 @@ static const struct edid_quirk edid_quirk_list[] = { * only supports DPCD backlight controls */ { MFG(0x4c, 0x83), PROD_ID(0x41, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, + /* HP CML 2020 system */ + { MFG(0x4c, 0x83), PROD_ID(0x45, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, /* * Some Dell CML 2020 systems have panels support both AUX and PWM * backlight control, and some only support AUX backlight control. All -- 2.17.1
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