diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c | 52 |
1 files changed, 46 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c index dec58b3c42e4..2c7eb982eabc 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c @@ -1002,15 +1002,27 @@ static bool get_pixel_clk_frequency_100hz( { struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source); unsigned int clock_hz = 0; + unsigned int modulo_hz = 0; if (clock_source->id == CLOCK_SOURCE_ID_DP_DTO) { clock_hz = REG_READ(PHASE[inst]); - /* NOTE: There is agreement with VBIOS here that MODULO is - * programmed equal to DPREFCLK, in which case PHASE will be - * equivalent to pixel clock. - */ - *pixel_clk_khz = clock_hz / 100; + if (clock_source->ctx->dc->hwss.enable_vblanks_synchronization && + clock_source->ctx->dc->config.vblank_alignment_max_frame_time_diff > 0) { + /* NOTE: In case VBLANK syncronization is enabled, MODULO may + * not be programmed equal to DPREFCLK + */ + modulo_hz = REG_READ(MODULO[inst]); + *pixel_clk_khz = div_u64((uint64_t)clock_hz* + clock_source->ctx->dc->clk_mgr->dprefclk_khz*10, + modulo_hz); + } else { + /* NOTE: There is agreement with VBIOS here that MODULO is + * programmed equal to DPREFCLK, in which case PHASE will be + * equivalent to pixel clock. + */ + *pixel_clk_khz = clock_hz / 100; + } return true; } @@ -1074,8 +1086,35 @@ static bool dcn20_program_pix_clk( struct pixel_clk_params *pix_clk_params, struct pll_settings *pll_settings) { + struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source); + unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0; + dce112_program_pix_clk(clock_source, pix_clk_params, pll_settings); + if (clock_source->ctx->dc->hwss.enable_vblanks_synchronization && + clock_source->ctx->dc->config.vblank_alignment_max_frame_time_diff > 0) { + /* NOTE: In case VBLANK syncronization is enabled, + * we need to set modulo to default DPREFCLK first + * dce112_program_pix_clk does not set default DPREFCLK + */ + REG_WRITE(MODULO[inst], + clock_source->ctx->dc->clk_mgr->dprefclk_khz*1000); + } + return true; +} + +static bool dcn20_override_dp_pix_clk( + struct clock_source *clock_source, + unsigned int inst, + unsigned int pixel_clk, + unsigned int ref_clk) +{ + struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source); + + REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 0); + REG_WRITE(PHASE[inst], pixel_clk); + REG_WRITE(MODULO[inst], ref_clk); + REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 1); return true; } @@ -1083,7 +1122,8 @@ static const struct clock_source_funcs dcn20_clk_src_funcs = { .cs_power_down = dce110_clock_source_power_down, .program_pix_clk = dcn20_program_pix_clk, .get_pix_clk_dividers = dce112_get_pix_clk_dividers, - .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz + .get_pixel_clk_frequency_100hz = get_pixel_clk_frequency_100hz, + .override_dp_pix_clk = dcn20_override_dp_pix_clk }; #if defined(CONFIG_DRM_AMD_DC_DCN) |