diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c | 63 |
1 files changed, 59 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c index 0782b74624d7..103dc3cf1c43 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c @@ -255,13 +255,12 @@ static int dce_set_clock( pxl_clk_params.target_pixel_clock = requested_clk_khz; pxl_clk_params.pll_id = CLOCK_SOURCE_ID_DFS; - if (clk_dce->dfs_bypass_enabled) + if (clk_dce->dfs_bypass_active) pxl_clk_params.flags.SET_DISPCLK_DFS_BYPASS = true; bp->funcs->program_display_engine_pll(bp, &pxl_clk_params); - if (clk_dce->dfs_bypass_enabled) { - + if (clk_dce->dfs_bypass_active) { /* Cache the fixed display clock*/ clk_dce->dfs_bypass_disp_clk = pxl_clk_params.dfs_bypass_display_clock; @@ -677,6 +676,61 @@ static void dce_update_clocks(struct dccg *dccg, } } +static bool dce_update_dfs_bypass( + struct dccg *dccg, + struct dc *dc, + struct dc_state *context, + int requested_clock_khz) +{ + struct dce_dccg *clk_dce = TO_DCE_CLOCKS(dccg); + struct resource_context *res_ctx = &context->res_ctx; + enum signal_type signal_type = SIGNAL_TYPE_NONE; + bool was_active = clk_dce->dfs_bypass_active; + int i; + + /* Disable DFS bypass by default. */ + clk_dce->dfs_bypass_active = false; + + /* Check that DFS bypass is available. */ + if (!clk_dce->dfs_bypass_enabled) + goto update; + + /* Check if the requested display clock is below the threshold. */ + if (requested_clock_khz >= 400000) + goto update; + + /* DFS-bypass should only be enabled on single stream setups */ + if (context->stream_count != 1) + goto update; + + /* Check that the stream's signal type is an embedded panel */ + for (i = 0; i < dc->res_pool->pipe_count; i++) { + if (res_ctx->pipe_ctx[i].stream) { + struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[i]; + + signal_type = pipe_ctx->stream->sink->link->connector_signal; + break; + } + } + + if (signal_type == SIGNAL_TYPE_EDP || + signal_type == SIGNAL_TYPE_LVDS) + clk_dce->dfs_bypass_active = true; + +update: + /* Update the clock state. We don't need to respect safe_to_lower + * because DFS bypass should always be greater than the current + * display clock frequency. + */ + if (was_active != clk_dce->dfs_bypass_active) { + dccg->clks.dispclk_khz = + dccg->funcs->set_dispclk(dccg, dccg->clks.dispclk_khz); + return true; + } + + return false; +} + #ifdef CONFIG_DRM_AMD_DC_DCN1_0 static const struct display_clock_funcs dcn1_funcs = { .get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz, @@ -700,7 +754,8 @@ static const struct display_clock_funcs dce112_funcs = { static const struct display_clock_funcs dce110_funcs = { .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz, .set_dispclk = dce_psr_set_clock, - .update_clocks = dce_update_clocks + .update_clocks = dce_update_clocks, + .update_dfs_bypass = dce_update_dfs_bypass }; static const struct display_clock_funcs dce_funcs = { |