diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index b21ad4ea9dca..2fd01b299f73 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -759,12 +759,19 @@ static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi) dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE); } +static const u32 minimum_lbccs[] = {10, 5, 4, 3}; + +static inline u32 dw_mipi_dsi_get_minimum_lbcc(struct dw_mipi_dsi *dsi) +{ + return minimum_lbccs[dsi->lanes - 1]; +} + /* Get lane byte clock cycles. */ static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi, const struct drm_display_mode *mode, u32 hcomponent) { - u32 frac, lbcc; + u32 frac, lbcc, minimum_lbcc; int bpp; bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); @@ -780,6 +787,11 @@ static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi, if (frac) lbcc++; + minimum_lbcc = dw_mipi_dsi_get_minimum_lbcc(dsi); + + if (lbcc < minimum_lbcc) + lbcc = minimum_lbcc; + return lbcc; }