From: Jun Lei <[email protected]> [why] memcmp is vulnerable to regression due to dc_clocks structures not being organized properly (not "current" clock related structures being at the beginning of the structure) and causes unnecessary setting of the optimize bit
[how] add a dcn sepcific comparator, implement for dcn2 Change-Id: I5525ee91093ed97235e1b85a70ea41e95240953b Signed-off-by: Jun Lei <[email protected]> Reviewed-by: Anthony Koo <[email protected]> Acked-by: Bhawanpreet Lakha <[email protected]> --- .../display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c | 24 +++++++++++++++++++ drivers/gpu/drm/amd/display/dc/core/dc.c | 12 ++++++++-- .../gpu/drm/amd/display/dc/inc/hw/clk_mgr.h | 3 +++ 3 files changed, 37 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c index 559e16983f91..ecd2cb4840e3 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c @@ -349,12 +349,36 @@ void dcn2_get_clock(struct clk_mgr *clk_mgr, } } +static bool dcn2_are_clock_states_equal(struct dc_clocks *a, + struct dc_clocks *b) +{ + if (a->dispclk_khz != b->dispclk_khz) + return false; + else if (a->dppclk_khz != b->dppclk_khz) + return false; + else if (a->dcfclk_khz != b->dcfclk_khz) + return false; + else if (a->socclk_khz != b->socclk_khz) + return false; + else if (a->dcfclk_deep_sleep_khz != b->dcfclk_deep_sleep_khz) + return false; + else if (a->phyclk_khz != b->phyclk_khz) + return false; + else if (a->dramclk_khz != b->dramclk_khz) + return false; + else if (a->p_state_change_support != b->p_state_change_support) + return false; + + return true; +} + static struct clk_mgr_funcs dcn2_funcs = { .get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz, .update_clocks = dcn2_update_clocks, .init_clocks = dcn2_init_clocks, .enable_pme_wa = dcn2_enable_pme_wa, .get_clock = dcn2_get_clock, + .are_clock_states_equal = dcn2_are_clock_states_equal, }; diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index a56a989ee607..7ac68e77b32b 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1681,8 +1681,16 @@ enum surface_update_type dc_check_update_surfaces_for_stream( updates[i].surface->update_flags.raw = 0xFFFFFFFF; } - if (type == UPDATE_TYPE_FAST && memcmp(&dc->current_state->bw_ctx.bw.dcn.clk, &dc->clk_mgr->clks, offsetof(struct dc_clocks, prev_p_state_change_support)) != 0) - dc->optimized_required = true; + if (type == UPDATE_TYPE_FAST) { + // If there's an available clock comparator, we use that. + if (dc->clk_mgr->funcs->are_clock_states_equal) { + if (!dc->clk_mgr->funcs->are_clock_states_equal(&dc->clk_mgr->clks, &dc->current_state->bw_ctx.bw.dcn.clk)) + dc->optimized_required = true; + // Else we fallback to mem compare. + } else if (memcmp(&dc->current_state->bw_ctx.bw.dcn.clk, &dc->clk_mgr->clks, offsetof(struct dc_clocks, prev_p_state_change_support)) != 0) { + dc->optimized_required = true; + } + } return type; } diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h index 76f9ad1b23df..2fdd0ba93beb 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h @@ -180,6 +180,9 @@ struct clk_mgr_funcs { struct dc_state *context, enum dc_clock_type clock_type, struct dc_clock_config *clock_cfg); + + bool (*are_clock_states_equal) (struct dc_clocks *a, + struct dc_clocks *b); }; struct clk_mgr { -- 2.17.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
