| Message ID | 20191011152822.26495-1-aaron.ma@canonical.com |
|---|---|
| Headers | show |
| Series | UBUNTU: SAUCE: enable adjusting brightness on some samsung OLED panels | expand |
On 11.10.2019 18.28, Aaron Ma wrote: > BugLink: https://bugs.launchpad.net/bugs/1844798 > > [Impact] > OLED backlight of Samsung is not supported by the current kernel. > brightness can't be adjusted. > > [Fix] > Fix max brightness value; > Follow samsung panel's spec to enable dpcd and > support adjusting brightness on OLED. > > [Test] > Verified on several laptops, backlight on and brightness is adjusted. > > [Regression Potential] > Medium, change is limited to specific hardware feature. > Verified on no dpcd support laptops, no regression found yet. > > These patches are still working in progress, but brightness adjustion > is a must-have feature in some urgent projects, > so we apply this fix first on bionic oem kernel only, > once got the final fix we can rework these patches. Indeed, so.. applied to oem-next.
BugLink: https://bugs.launchpad.net/bugs/1844798 [Impact] OLED backlight of Samsung is not supported by the current kernel. brightness can't be adjusted. [Fix] Fix max brightness value; Follow samsung panel's spec to enable dpcd and support adjusting brightness on OLED. [Test] Verified on several laptops, backlight on and brightness is adjusted. [Regression Potential] Medium, change is limited to specific hardware feature. Verified on no dpcd support laptops, no regression found yet. These patches are still working in progress, but brightness adjustion is a must-have feature in some urgent projects, so we apply this fix first on bionic oem kernel only, once got the final fix we can rework these patches. Furquan Shaikh (1): UBUNTU: SAUCE: i915: intel_dp_aux_backlight: Fix max backlight calculations Lee Shawn C (1): UBUNTU: SAUCE: drm/i915: customize DPCD brightness control for specific panel drivers/gpu/drm/drm_dp_helper.c | 18 +- drivers/gpu/drm/i915/intel_dp.c | 7 + drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 273 ++++++++++++++---- include/drm/drm_dp_helper.h | 20 ++ 4 files changed, 266 insertions(+), 52 deletions(-)