From 3522a33a2746b519b27a675639ac976c9189d1de Mon Sep 17 00:00:00 2001
From: Vandita Kulkarni <vandita.kulkarni@intel.com>
Date: Tue, 30 Jul 2019 13:06:43 +0530
Subject: drm/i915/tgl/dsi: Program TRANS_VBLANK register
Git-commit: 3522a33a2746b519b27a675639ac976c9189d1de
Patch-mainline: v5.4-rc1
References: bsc#1152489
Program vblank register for mipi dsi in video mode
on TGL.
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190730073648.5157-2-vandita.kulkarni@intel.com
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index a42348be0438..7b8fdb16b651 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -862,6 +862,15 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder,
dsi_trans = dsi_port_to_transcoder(port);
I915_WRITE(VSYNCSHIFT(dsi_trans), vsync_shift);
}
+
+ /* program TRANS_VBLANK register, should be same as vtotal programmed */
+ if (INTEL_GEN(dev_priv) >= 12) {
+ for_each_dsi_port(port, intel_dsi->ports) {
+ dsi_trans = dsi_port_to_transcoder(port);
+ I915_WRITE(VBLANK(dsi_trans),
+ (vactive - 1) | ((vtotal - 1) << 16));
+ }
+ }
}
static void gen11_dsi_enable_transcoder(struct intel_encoder *encoder)
--
2.28.0