This patch set contain 5 patches. Another 4 patches in previous version was already merged in v7. - First two patches allow choosing which way to adjust brightness if both PWM pin and AUX are supported - Next patch adds support for dynamic brightness. - Last two patches set the PWM freqency to match data in panel vbt.
Change log: v9: - Fix nits in v8
v8: - Drop 4 patches that was already merged - Move DP_EDP_BACKLIGHT_AUX_ENABLE_CAP check to patch #2 to avoid behavior change if only apply patch #1 - Add TODO to warn about enable backlight twice in patch #2 - Use DIV_ROUND_CLOSEST instead of just "/" in patch #5 - Fix bug calculate pn in patch #5 - Clarify commit message / code comment in patch #5
v7: - Add check in intel_dp_pwm_pin_display_control_capable in patch #4 - Add option in patch #6 to enable DPCD or not - Change definition in patch #8 and implementation in #9 to use Khz - Fix compiler warning from build bot in patch #9
v6: - Address review from Dhinakaran - Make PWM frequency to have highest value of Pn that make the frequency still within 25% of desired frequency.
v5: - Split first patch in v4 to 3 patches - Bump priority for "Correctly enable backlight brightness adjustment via DPCD" - Make logic clearer for the case that both PWM pin and AUX are supported - Add more log when write to register fail - Add log when enable DBC
v4: - Rebase / minor typo fix.
v3: - Add new implementation of PWM frequency patch
v2: - Drop PWM frequency patch - Address suggestion from Jani Nikula
Puthikorn Voravootivat (5): drm/i915: Drop AUX backlight enable check for backlight control drm/i915: Allow choosing how to adjust brightness if both supported drm/i915: Add option to support dynamic backlight via DPCD drm: Add definition for eDP backlight frequency drm/i915: Set PWM divider to match desired frequency in vbt
drivers/gpu/drm/i915/i915_params.c | 13 ++- drivers/gpu/drm/i915/i915_params.h | 5 +- drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 156 +++++++++++++++++++++++--- include/drm/drm_dp_helper.h | 2 + 4 files changed, 157 insertions(+), 19 deletions(-)