The bridge chip ANX7625 require the line packets ending at the sametime
or ANX7625 will shift the screen.
Change-Id: Ia324ad28fbff54140feedb9a1d6bfb2b246d0447
Signed-off-by: Jitao Shi <jitao.shi@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_dsi.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index a1ff152ef468..e825a80862de 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -194,6 +194,8 @@ struct mtk_dsi {
struct clk *hs_clk;
u32 data_rate;
+ /* force dsi line end without dsi_null data */
+ bool force_dsi_end_without_null;
unsigned long mode_flags;
enum mipi_dsi_pixel_format format;
@@ -495,6 +497,13 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n");
}
+ if (dsi->force_dsi_end_without_null) {
+ horizontal_sync_active_byte = roundup(horizontal_sync_active_byte, dsi->lanes) - 2;
+ horizontal_frontporch_byte = roundup(horizontal_frontporch_byte, dsi->lanes) - 2;
+ horizontal_backporch_byte = roundup(horizontal_backporch_byte, dsi->lanes) - 2;
+ horizontal_backporch_byte -= (vm->hactive * dsi_tmp_buf_bpp + 2) % dsi->lanes;
+ }
+
writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
@@ -1091,6 +1100,9 @@ static int mtk_dsi_probe(struct platform_device *pdev)
dsi->bridge.of_node = dev->of_node;
dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
+ dsi->force_dsi_end_without_null = of_property_read_bool(dev->of_node,
+ "force_dsi_end_without_null");
+
drm_bridge_add(&dsi->bridge);
ret = component_add(&pdev->dev, &mtk_dsi_component_ops);
--
2.25.1
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