From: Chris Zhong <zyw@rock-chips.com>
To: dianders@chromium.org, tfiga@chromium.org, heiko@sntech.de,
yzq@rock-chips.com
Cc: linux-rockchip@lists.infradead.org,
Chris Zhong <zyw@rock-chips.com>,
Mark Yao <mark.yao@rock-chips.com>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 7/7] drm/rockchip: dw-mipi: fix insufficient bandwidth of some panel
Date: Fri, 8 Jul 2016 17:05:01 +0800 [thread overview]
Message-ID: <1467968701-15620-8-git-send-email-zyw@rock-chips.com> (raw)
In-Reply-To: <1467968701-15620-1-git-send-email-zyw@rock-chips.com>
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 <zyw@rock-chips.com>
---
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 8401185..fca7dde 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -503,8 +503,8 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi)
mpclk = DIV_ROUND_UP(dsi->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
prev parent reply other threads:[~2016-07-08 9:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-08 9:04 [PATCH 0/7] Rockchip dw-mipi-dsi driver Chris Zhong
2016-07-08 9:04 ` [PATCH 1/7] dt-bindings: add rk3399 support for dw-mipi-rockchip Chris Zhong
2016-07-13 13:49 ` Rob Herring
2016-07-08 9:04 ` [PATCH 2/7] DRM: mipi: support rk3399 mipi dsi Chris Zhong
2016-07-08 9:04 ` [PATCH 3/7] dt-bindings: add power domain node for dw-mipi-rockchip Chris Zhong
2016-07-13 13:50 ` Rob Herring
2016-07-08 9:04 ` [PATCH 4/7] drm/rockchip: dw-mipi: add dw-mipi power domain support Chris Zhong
2016-07-08 9:04 ` [PATCH 5/7] drm/rockchip: dw-mipi: support HPD poll Chris Zhong
2016-07-08 13:52 ` John Keeping
2016-07-11 0:46 ` Mark yao
2016-07-11 9:20 ` John Keeping
2016-07-08 9:05 ` [PATCH 6/7] drm/rockchip: dw-mipi: fix phy clk lane stop state timeout Chris Zhong
2016-07-08 9:05 ` Chris Zhong [this message]
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