| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 77/94] drm/radeon: fix dpms when driver backlight control is disabled | Date | Fri, 13 Nov 2015 10:10:11 +0000 |
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3.16.7-ckt20 -stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
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@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- drivers/gpu/drm/radeon/atombios_encoders.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index 1ab0ce99aa9d..7961b80b6a78 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -1610,9 +1610,14 @@ radeon_atom_encoder_dpms_avivo(struct drm_encoder *encoder, int mode) } 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: @@ -1692,8 +1697,13 @@ radeon_atom_encoder_dpms_dig(struct drm_encoder *encoder, int mode) 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;
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