diff options
| author | Lee, Shawn C <[email protected]> | 2018-09-11 23:22:51 -0700 |
|---|---|---|
| committer | Jani Nikula <[email protected]> | 2018-09-19 16:44:12 +0300 |
| commit | e884818cc0edb9bd128de95e7ca6b569f4667c0f (patch) | |
| tree | 8a94fe1ff37963d42186c3fb05c53b7eda66bb20 | |
| parent | 53ca2edcf033f3368b2dc0ef3cbcc2f47d556d13 (diff) | |
drm: add LG eDP panel to quirk database
The N value was computed by kernel driver that based on synchronous clock
mode. But only specific N value (0x8000) would be acceptable for
LG LP140WF6-SPM1 eDP panel which is running at asynchronous clock mode.
With the other N value, Tcon will enter BITS mode and display black screen.
Add this panel into quirk database and give particular N value when
calculate M/N divider.
v2: no update
v3: add lost commit messages back for version 2
v4: send patch to both intel-gfx and dri-devel
Cc: Jani Nikula <[email protected]>
Cc: Cooper Chiou <[email protected]>
Cc: Matt Atwood <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Dhinakaran Pandiyan <[email protected]>
Cc: Clint Taylor <[email protected]>
Signed-off-by: Lee, Shawn C <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index c1fe1713eaef..37c01b6076ec 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -1271,6 +1271,8 @@ struct dpcd_quirk { static const struct dpcd_quirk dpcd_quirk_list[] = { /* Analogix 7737 needs reduced M and N at HBR2 link rates */ { OUI(0x00, 0x22, 0xb9), DEVICE_ID_ANY, true, BIT(DP_DPCD_QUIRK_CONSTANT_N) }, + /* LG LP140WF6-SPM1 eDP panel */ + { OUI(0x00, 0x22, 0xb9), DEVICE_ID('s', 'i', 'v', 'a', 'r', 'T'), false, BIT(DP_DPCD_QUIRK_CONSTANT_N) }, }; #undef OUI |