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drm/radeon/kms: fix DDIA enable on some rs690 systems
DVOOutputControl checks the value of of bios scratch reg 3 on some tables and assumes the encoder is already enabled if the DFP2_ACTIVE bit is set. Clear that bit so the table sets the DDIA enable bit properly. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
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1 changed files with 8 additions and 1 deletions
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@ -1507,6 +1507,13 @@ radeon_atom_encoder_dpms(struct drm_encoder *encoder, int mode)
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switch (mode) {
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case DRM_MODE_DPMS_ON:
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args.ucAction = ATOM_ENABLE;
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/* workaround for DVOOutputControl on some RS690 systems */
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if (radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_DDI) {
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u32 reg = RREG32(RADEON_BIOS_3_SCRATCH);
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WREG32(RADEON_BIOS_3_SCRATCH, reg & ~ATOM_S3_DFP2I_ACTIVE);
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atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
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WREG32(RADEON_BIOS_3_SCRATCH, reg);
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} else
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atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
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if (radeon_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
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args.ucAction = ATOM_LCD_BLON;
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