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| author | Dave Airlie <airlied@redhat.com> | 2025-08-29 08:55:29 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2025-08-29 08:55:43 +1000 |
| commit | ddcc2bb28878b5e7f7aeeb2b510629960b6714a5 (patch) | |
| tree | 6a87adc152585da570f71edce751c1d2c792c9bb /drivers/gpu/drm/display/drm_dp_helper.c | |
| parent | 1cd0c7afef97c3192edc92774a62d36b2a0bf2e0 (diff) | |
| parent | 5c76c794bf29399394ebacaa5af8436b8bed0d46 (diff) | |
Merge tag 'drm-misc-next-2025-08-28' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next
drm-misc-next for v6.18:
UAPI Changes:
atomic:
- Reallow no-op async page flips
Cross-subsystem Changes:
hid:
- i2c-hid: Make elan touch controllers power on after panel is enabled
video:
- Improve pixel-format handling for struct screen_info
Core Changes:
display:
- dp: Fix command length
Driver Changes:
amdxdna:
- Fixes
bridge:
- Add support for Radxa Ra620 plus DT bindings
msm:
- Fix VMA allocation
panel:
- ilitek-ili9881c: Refactor mode setting; Add support for Bestar
BSD1218-A101KL68 LCD plus DT bindings
- lvds: Add support for Ampire AMP19201200B5TZQW-T03 to DT bindings
rockchip:
- dsi2: Add support for RK3576 plus DT bindings
stm:
- Clean up logging
vesadrm:
- Support 8-bit palette mode
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250828065714.GA11906@linux.fritz.box
Diffstat (limited to 'drivers/gpu/drm/display/drm_dp_helper.c')
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_helper.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 1ecc3df7e316..4aaeae4fa03c 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -3962,6 +3962,7 @@ int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_bac int ret; unsigned int offset = DP_EDP_BACKLIGHT_BRIGHTNESS_MSB; u8 buf[3] = { 0 }; + size_t len = 2; /* The panel uses the PWM for controlling brightness levels */ if (!(bl->aux_set || bl->luminance_set)) @@ -3974,6 +3975,7 @@ int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_bac buf[1] = (level & 0x00ff00) >> 8; buf[2] = (level & 0xff0000) >> 16; offset = DP_EDP_PANEL_TARGET_LUMINANCE_VALUE; + len = 3; } else if (bl->lsb_reg_used) { buf[0] = (level & 0xff00) >> 8; buf[1] = (level & 0x00ff); @@ -3981,7 +3983,7 @@ int drm_edp_backlight_set_level(struct drm_dp_aux *aux, const struct drm_edp_bac buf[0] = level; } - ret = drm_dp_dpcd_write_data(aux, offset, buf, sizeof(buf)); + ret = drm_dp_dpcd_write_data(aux, offset, buf, len); if (ret < 0) { drm_err(aux->drm_dev, "%s: Failed to write aux backlight level: %d\n", |