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Date: Mon, 30 Jan 2017 15:25:10 -0500 From: Sean Paul <seanpaul@...omium.org> To: John Keeping <john@...anate.com> Cc: Mark Yao <mark.yao@...k-chips.com>, linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, linux-rockchip@...ts.infradead.org, Chris Zhong <zyw@...k-chips.com>, linux-arm-kernel@...ts.infradead.org Subject: Re: [PATCH v3 13/24] drm/rockchip: dw-mipi-dsi: fix escape clock rate On Sun, Jan 29, 2017 at 01:24:33PM +0000, John Keeping wrote: > This clock rate is derived from the PHY PLL, so it should be calculated > dynamically. Use the same calculation as the vendor kernel to derive > the escape clock speed. > Nit below, but Reviewed-by: Sean Paul <seanpaul@...omium.org> > Signed-off-by: John Keeping <john@...anate.com> > Reviewed-by: Chris Zhong <zyw@...k-chips.com> > --- > v3: > - Improve the commit message a bit > - Add Chris' Reviewed-by > Unchanged in v2 > > drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c > index 290282e86d16..c2e0ba96e0a0 100644 > --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c > +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c > @@ -710,11 +710,13 @@ static void dw_mipi_dsi_disable(struct dw_mipi_dsi *dsi) > > static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi) > { Nit: It would be nice to add a comment to the effect of "You are not meant to understand this, it comes from the vendor kernel" > + u32 esc_clk_division = (dsi->lane_mbps >> 3) / 20 + 1; > + > dsi_write(dsi, DSI_PWR_UP, RESET); > dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK > | PHY_RSTZ | PHY_SHUTDOWNZ); > dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVIDSION(10) | > - TX_ESC_CLK_DIVIDSION(7)); > + TX_ESC_CLK_DIVIDSION(esc_clk_division)); > } > > static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi, > -- > 2.11.0.197.gb556de5.dirty > > _______________________________________________ > dri-devel mailing list > dri-devel@...ts.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Sean Paul, Software Engineer, Google / Chromium OS
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