FIXME: To be squashed to another patch. Cc: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> --- drivers/gpu/drm/i915/display/icl_dsi.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c index f09e2e37d442..e343e476dbb5 100644 --- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -799,11 +799,26 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder, u16 hback_porch; /* vertical timings */ u16 vtotal, vactive, vsync_start, vsync_end, vsync_shift; + int cfr; + + /* + * Adjust horizontal timings (htotal, hsync_start, hsync_end) to account + * for slower link speed if DSC is enabled. + * + * cfr for compression frequency ratio. + * + * FIXME: The clock sources are ugly. + */ + if (pipe_config->dsc.compression_enable) + cfr = DIV_ROUND_UP(100 * afe_clk(encoder, pipe_config), + intel_dsi_bitrate(intel_dsi)); + else + cfr = 100; hactive = adjusted_mode->crtc_hdisplay; - htotal = adjusted_mode->crtc_htotal; - hsync_start = adjusted_mode->crtc_hsync_start; - hsync_end = adjusted_mode->crtc_hsync_end; + htotal = DIV_ROUND_UP(adjusted_mode->crtc_htotal * cfr, 100); + hsync_start = DIV_ROUND_UP(adjusted_mode->crtc_hsync_start * cfr, 100); + hsync_end = DIV_ROUND_UP(adjusted_mode->crtc_hsync_end * cfr, 100); hsync_size = hsync_end - hsync_start; hback_porch = (adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end); -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
