This is a note to let you know that I've just added the patch titled drm/radeon: fix dpms when driver backlight control is disabled to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-radeon-fix-dpms-when-driver-backlight-control-is-disabled.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ae93580ee59c02395c1711d3e6b90546b8137b86 Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher@xxxxxxx> Date: Tue, 27 Oct 2015 10:56:44 -0400 Subject: drm/radeon: fix dpms when driver backlight control is disabled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Alex Deucher <alexander.deucher@xxxxxxx> commit ae93580ee59c02395c1711d3e6b90546b8137b86 upstream. If driver backlight control is disabled, either by driver parameter or default per-asic setting, revert to the old behavior. Fixes a regression in commit: 4281f46ef839050d2ef60348f661eb463c21cc2e Reviewed-by: Michel Dänzer <michel.daenzer@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/radeon/atombios_encoders.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -1624,9 +1624,14 @@ radeon_atom_encoder_dpms_avivo(struct dr } else atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) { - struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv; + if (rdev->mode_info.bl_encoder) { + struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv; - atombios_set_backlight_level(radeon_encoder, dig->backlight_level); + atombios_set_backlight_level(radeon_encoder, dig->backlight_level); + } else { + args.ucAction = ATOM_LCD_BLON; + atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args); + } } break; case DRM_MODE_DPMS_STANDBY: @@ -1706,8 +1711,13 @@ radeon_atom_encoder_dpms_dig(struct drm_ if (ASIC_IS_DCE4(rdev)) atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON, 0); } - if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) - atombios_set_backlight_level(radeon_encoder, dig->backlight_level); + if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) { + if (rdev->mode_info.bl_encoder) + atombios_set_backlight_level(radeon_encoder, dig->backlight_level); + else + atombios_dig_transmitter_setup(encoder, + ATOM_TRANSMITTER_ACTION_LCD_BLON, 0, 0); + } if (ext_encoder) atombios_external_encoder_setup(encoder, ext_encoder, ATOM_ENABLE); break; Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are queue-4.1/drm-radeon-move-bl-encoder-assignment-into-bl-init.patch queue-4.1/drm-radeon-fix-dpms-when-driver-backlight-control-is-disabled.patch queue-4.1/drm-radeon-don-t-try-to-recreate-sysfs-entries-on-resume.patch queue-4.1/drm-radeon-dpm-don-t-add-pwm-attributes-if-dpm-is-disabled.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html