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drm/i915/dsi: Fix off by one in BXT_MIPI_TRANS_VTOTAL

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commit c464ce6af332e7c802c36cd337cacf81db05400c upstream.

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

Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250314150136.22564-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit 7b3685c9b38c3097f465efec8b24dbed63258cf6)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ville Syrjälä
2025-03-14 17:01:34 +02:00
committed by Greg Kroah-Hartman
parent e5e1996780
commit cc0a3fd781
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/display/vlv_dsi.c
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@@ -1059,7 +1059,7 @@ 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));
@@ -1264,7 +1264,7 @@ 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),