Hi, Jitao:
Jitao Shi jitao.shi@mediatek.com 於 2020年8月18日 週二 上午10:41寫道：
On Tue, 2020-08-18 at 07:42 +0800, Chun-Kuang Hu wrote:
Hi, Jitao:
Jitao Shi jitao.shi@mediatek.com 於 2020年8月17日 週一 下午9:07寫道：
horizontal_backporch_byte should be hbp * bpp - hbp extra bytes. So remove the wrong subtraction 10.
Signed-off-by: Jitao Shi jitao.shi@mediatek.com
drivers/gpu/drm/mediatek/mtk_dsi.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 270bf22c98fe..5d031e634571 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -473,14 +473,13 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi) horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
So this subtraction 10 is correct?
Regards, Chun-Kuang.
Yes, It is right.
In the cea861 and dmt spec the mini hsync is 40 pixels. So the vm->hsync_len * dsi_tmp_buf_bpp >= 120 > 10
OK, so
Reviewed-by: Chun-Kuang Hu chunkuang.hu@kernel.org
Best Regards jitao
if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
horizontal_backporch_byte =(vm->hback_porch * dsi_tmp_buf_bpp - 10);
horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp; else
horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) *dsi_tmp_buf_bpp - 10);
horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *dsi_tmp_buf_bpp; data_phy_cycles = timing->lpx + timing->da_hs_prepare +
timing->da_hs_zero + timing->da_hs_exit + 3;
timing->da_hs_zero + timing->da_hs_exit; if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >-- 2.12.5 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek