From: Sung Lee sung.lee@amd.com
[ Upstream commit 615b9b585eb57c1d49382d16a62de768f2c6a340 ]
[Why] Previously update_bw_bounding_box for RN was commented out due to incorrect values causing BSOD on Hybrid Graphics. However, commenting out this function also may cause issues such as underflow in certain cases such as 2x4K displays.
[How] Fix dram_speed_mts calculations. Update from proper index of clock_limits[]
Signed-off-by: Sung Lee sung.lee@amd.com Reviewed-by: Yongqiang Sun yongqiang.sun@amd.com Acked-by: Rodrigo Siqueira Rodrigo.Siqueira@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c index fe0ed4c09ad0a..83cda43a1b6b3 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c @@ -1352,12 +1352,6 @@ struct display_stream_compressor *dcn21_dsc_create(
static void update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params) { - /* - TODO: Fix this function to calcualte correct values. - There are known issues with this function currently - that will need to be investigated. Use hardcoded known good values for now. - - struct dcn21_resource_pool *pool = TO_DCN21_RES_POOL(dc->res_pool); struct clk_limit_table *clk_table = &bw_params->clk_table; int i; @@ -1372,11 +1366,10 @@ static void update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_param dcn2_1_soc.clock_limits[i].dcfclk_mhz = clk_table->entries[i].dcfclk_mhz; dcn2_1_soc.clock_limits[i].fabricclk_mhz = clk_table->entries[i].fclk_mhz; dcn2_1_soc.clock_limits[i].socclk_mhz = clk_table->entries[i].socclk_mhz; - dcn2_1_soc.clock_limits[i].dram_speed_mts = clk_table->entries[i].memclk_mhz * 16 / 1000; + dcn2_1_soc.clock_limits[i].dram_speed_mts = clk_table->entries[i].memclk_mhz * 2; } - dcn2_1_soc.clock_limits[i] = dcn2_1_soc.clock_limits[i - i]; + dcn2_1_soc.clock_limits[i] = dcn2_1_soc.clock_limits[i - 1]; dcn2_1_soc.num_states = i; - */ }
/* Temporary Place holder until we can get them from fuse */