[RESEND PATCH v7 6/7] drm/rockchip/dsi: fix insufficient bandwidth of some panel
From: Chris Zhong <hidden>
Date: 2017-02-20 08:03:08
Also in:
dri-devel, linux-devicetree, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, drm drivers, drm drivers and misc gpu patches, drm drivers for rockchip, the rest · Maintainers:
Heiko Stuebner, David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Sandy Huang, Andy Yan, Linus Torvalds
Set the lanes bps to 1 / 0.9 times of pclk, the margin is not enough for some panel, it will cause the screen display is not normal, so increases the badnwidth to 1 / 0.8. Signed-off-by: Chris Zhong <redacted> --- Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index c2d7674..a653384 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c@@ -532,8 +532,8 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi, mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC); if (mpclk) { - /* take 1 / 0.9, since mbps must big than bandwidth of RGB */ - tmp = mpclk * (bpp / dsi->lanes) * 10 / 9; + /* take 1 / 0.8, since mbps must big than bandwidth of RGB */ + tmp = mpclk * (bpp / dsi->lanes) * 10 / 8; if (tmp < max_mbps) target_mbps = tmp; else
--
2.6.3