drm/tegra: dsi: Calculate packet parameters for video mode

Calculate packet parameters for video mode same way it is done for
command mode, by halving timings plugged into equations.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20250909073335.91531-3-clamor95@gmail.com

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index 368a3be..ae13b7a 100644 (file)
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -546,12 +546,19 @@ static void tegra_dsi_configure(struct tegra_dsi *dsi, unsigned int pipe,
                /* horizontal back porch */
                hbp = (mode->htotal - mode->hsync_end) * mul / div;
 
-               if ((dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) == 0)
-                       hbp += hsw;
-
                /* horizontal front porch */
                hfp = (mode->hsync_start - mode->hdisplay) * mul / div;
 
+               if (dsi->master || dsi->slave) {
+                       hact /= 2;
+                       hsw /= 2;
+                       hbp /= 2;
+                       hfp /= 2;
+               }
+
+               if ((dsi->flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) == 0)
+                       hbp += hsw;
+
                /* subtract packet overhead */
                hsw -= 10;
                hbp -= 14;