diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link.c | 77 |
1 files changed, 65 insertions, 12 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c index b39f76e61039..3b1e38e110ee 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c @@ -58,7 +58,6 @@ ******************************************************************************/ enum { - LINK_RATE_REF_FREQ_IN_MHZ = 27, PEAK_FACTOR_X1000 = 1006, /* * Some receivers fail to train on first try and are good @@ -1397,9 +1396,18 @@ static enum dc_status enable_link_dp( /* get link settings for video mode timing */ decide_link_settings(stream, &link_settings); + /* If link settings are different than current and link already enabled + * then need to disable before programming to new rate. + */ + if (link->link_status.link_active && + (link->cur_link_settings.lane_count != link_settings.lane_count || + link->cur_link_settings.link_rate != link_settings.link_rate)) { + dp_disable_link_phy(link, pipe_ctx->stream->signal); + } + pipe_ctx->stream_res.pix_clk_params.requested_sym_clk = link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ; - state->dccg->funcs->update_clocks(state->dccg, state, false); + state->clk_mgr->funcs->update_clocks(state->clk_mgr, state, false); dp_enable_link_phy( link, @@ -2150,7 +2158,7 @@ static bool dp_active_dongle_validate_timing( return false; } - if (get_timing_pixel_clock_100hz(timing) > (dongle_caps->dp_hdmi_max_pixel_clk * 10)) + if (get_timing_pixel_clock_100hz(timing) > (dongle_caps->dp_hdmi_max_pixel_clk_in_khz * 10)) return false; return true; @@ -2289,14 +2297,13 @@ void core_link_resume(struct dc_link *link) static struct fixed31_32 get_pbn_per_slot(struct dc_stream_state *stream) { - struct dc_link_settings *link_settings = - &stream->link->cur_link_settings; - uint32_t link_rate_in_mbps = - link_settings->link_rate * LINK_RATE_REF_FREQ_IN_MHZ; - struct fixed31_32 mbps = dc_fixpt_from_int( - link_rate_in_mbps * link_settings->lane_count); - - return dc_fixpt_div_int(mbps, 54); + struct fixed31_32 mbytes_per_sec; + uint32_t link_rate_in_mbytes_per_sec = dc_link_bandwidth_kbps(stream->link, &stream->link->cur_link_settings); + link_rate_in_mbytes_per_sec /= 8000; /* Kbits to MBytes */ + + mbytes_per_sec = dc_fixpt_from_int(link_rate_in_mbytes_per_sec); + + return dc_fixpt_div_int(mbytes_per_sec, 54); } static int get_color_depth(enum dc_color_depth color_depth) @@ -2321,7 +2328,7 @@ static struct fixed31_32 get_pbn_from_timing(struct pipe_ctx *pipe_ctx) uint32_t denominator; bpc = get_color_depth(pipe_ctx->stream_res.pix_clk_params.color_depth); - kbps = pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10 * bpc * 3; + kbps = dc_bandwidth_in_kbps_from_timing(&pipe_ctx->stream->timing); /* * margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006 @@ -2736,3 +2743,49 @@ void dc_link_enable_hpd_filter(struct dc_link *link, bool enable) } } +uint32_t dc_bandwidth_in_kbps_from_timing( + const struct dc_crtc_timing *timing) +{ + uint32_t bits_per_channel = 0; + uint32_t kbps; + + switch (timing->display_color_depth) { + case COLOR_DEPTH_666: + bits_per_channel = 6; + break; + case COLOR_DEPTH_888: + bits_per_channel = 8; + break; + case COLOR_DEPTH_101010: + bits_per_channel = 10; + break; + case COLOR_DEPTH_121212: + bits_per_channel = 12; + break; + case COLOR_DEPTH_141414: + bits_per_channel = 14; + break; + case COLOR_DEPTH_161616: + bits_per_channel = 16; + break; + default: + break; + } + + ASSERT(bits_per_channel != 0); + + kbps = timing->pix_clk_100hz / 10; + kbps *= bits_per_channel; + + if (timing->flags.Y_ONLY != 1) { + /*Only YOnly make reduce bandwidth by 1/3 compares to RGB*/ + kbps *= 3; + if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) + kbps /= 2; + else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) + kbps = kbps * 2 / 3; + } + + return kbps; + +} |