Commit c464ce6a authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Joonas Lahtinen
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drm/i915/dsi: Fix off by one in BXT_MIPI_TRANS_VTOTAL 



BXT_MIPI_TRANS_VTOTAL must be programmed with vtotal-1
instead of vtotal. Make it so.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250314150136.22564-1-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
(cherry picked from commit 7b3685c9)
Signed-off-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
parent a7137b18

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

+2 −2
Original line number Diff line number Diff line
@@ -1056,7 +1056,7 @@ static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder, 
				              BXT_MIPI_TRANS_VACTIVE(port));

	adjusted_mode->crtc_vtotal =

				intel_de_read(display,

				              BXT_MIPI_TRANS_VTOTAL(port));

				              BXT_MIPI_TRANS_VTOTAL(port)) + 1;



	hactive = adjusted_mode->crtc_hdisplay;

	hfp = intel_de_read(display, MIPI_HFP_COUNT(display, port));
@@ -1260,7 +1260,7 @@ static void set_dsi_timings(struct intel_encoder *encoder, 
			intel_de_write(display, BXT_MIPI_TRANS_VACTIVE(port),

				       adjusted_mode->crtc_vdisplay);

			intel_de_write(display, BXT_MIPI_TRANS_VTOTAL(port),

				       adjusted_mode->crtc_vtotal);

				       adjusted_mode->crtc_vtotal - 1);

		}



		intel_de_write(display, MIPI_HACTIVE_AREA_COUNT(display, port),