From: Roman Li <[email protected]> Fixing screen flickering when FBC enabled on Stoney
Change-Id: I14bb589ecc537b02ac62c710c852f3886156d15c Signed-off-by: Roman Li <[email protected]> Reviewed-by: Harry Wentland <[email protected]> --- .../gpu/drm/amd/display/dc/dce110/dce110_compressor.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c index 2e97e5757fb9..f82c26995609 100644 --- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c +++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_compressor.c @@ -189,7 +189,7 @@ void dce110_compressor_enable_fbc( (!dce110_compressor_is_fbc_enabled_in_hw(compressor, NULL))) { uint32_t addr; - uint32_t value; + uint32_t value, misc_value; addr = mmFBC_CNTL; @@ -206,9 +206,23 @@ void dce110_compressor_enable_fbc( compressor->attached_inst = params->inst; cp110->offsets = reg_offsets[params->inst]; - /*Toggle it as there is bug in HW */ + /* Toggle it as there is bug in HW */ set_reg_field_value(value, 0, FBC_CNTL, FBC_GRPH_COMP_EN); dm_write_reg(compressor->ctx, addr, value); + + /* FBC usage with scatter & gather for dce110 */ + misc_value = dm_read_reg(compressor->ctx, mmFBC_MISC); + + set_reg_field_value(misc_value, 1, + FBC_MISC, FBC_INVALIDATE_ON_ERROR); + set_reg_field_value(misc_value, 1, + FBC_MISC, FBC_DECOMPRESS_ERROR_CLEAR); + set_reg_field_value(misc_value, 0x14, + FBC_MISC, FBC_SLOW_REQ_INTERVAL); + + dm_write_reg(compressor->ctx, mmFBC_MISC, misc_value); + + /* Enable FBC */ set_reg_field_value(value, 1, FBC_CNTL, FBC_GRPH_COMP_EN); dm_write_reg(compressor->ctx, addr, value); -- 2.11.0 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
