Commit c2bb35e9 authored by Vandita Kulkarni's avatar Vandita Kulkarni Committed by Jani Nikula
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drm/i915/dsi: Fix state mismatch warns for horizontal timings with DSC 



When DSC is enabled consider the compression ratio that was used during
horizontal timing calculations.

This may still lead to warns due to rounding errors in the round-trip.

v2 by Jani:
- rebase on top of the more generic dsc state readout

Signed-off-by: default avatarVandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c2481aaf67ea396aa4698cd2d8e23d19ec4f4ecf.1575974743.git.jani.nikula@intel.com
parent 53693f02

drivers/gpu/drm/i915/display/icl_dsi.c

+12 −0
Original line number Diff line number Diff line
@@ -1255,6 +1255,18 @@ static void gen11_dsi_get_timings(struct intel_encoder *encoder, 
	struct drm_display_mode *adjusted_mode =

					&pipe_config->hw.adjusted_mode;



	if (pipe_config->dsc.compressed_bpp) {

		int div = pipe_config->dsc.compressed_bpp;

		int mul = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);



		adjusted_mode->crtc_htotal =

			DIV_ROUND_UP(adjusted_mode->crtc_htotal * mul, div);

		adjusted_mode->crtc_hsync_start =

			DIV_ROUND_UP(adjusted_mode->crtc_hsync_start * mul, div);

		adjusted_mode->crtc_hsync_end =

			DIV_ROUND_UP(adjusted_mode->crtc_hsync_end * mul, div);

	}



	if (intel_dsi->dual_link) {

		adjusted_mode->crtc_hdisplay *= 2;

		if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)