| Message ID | 20180423134750.30403-5-rui.silva@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Apr 23, 2018 at 02:47:39PM +0100, Rui Miguel Silva wrote: > To guarantee that we do not get Overflow in image FIFO the outer bandwidth has > to be faster than inputer bandwidth. For that it must be possible to set a > faster frequency clock. So set new parent to sys_pfd3 clock for the mipi csi > block. > > Cc: linux-clk@vger.kernel.org > Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> > --- > drivers/clk/imx/clk-imx7d.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/clk/imx/clk-imx7d.c b/drivers/clk/imx/clk-imx7d.c > index f7f4db2e6fa6..9a1a18ceb132 100644 > --- a/drivers/clk/imx/clk-imx7d.c > +++ b/drivers/clk/imx/clk-imx7d.c > @@ -891,6 +891,9 @@ static void __init imx7d_clocks_init(struct device_node *ccm_node) > clk_set_parent(clks[IMX7D_PLL_AUDIO_MAIN_BYPASS], clks[IMX7D_PLL_AUDIO_MAIN]); > clk_set_parent(clks[IMX7D_PLL_VIDEO_MAIN_BYPASS], clks[IMX7D_PLL_VIDEO_MAIN]); > > + clk_set_parent(clks[IMX7D_MIPI_CSI_ROOT_SRC], > + clks[IMX7D_PLL_SYS_PFD3_CLK]); > + For i.MX clock driver, we intentionally ignore line over 80 columns warning to make the file easier for read. So I would suggest you keep it on a single line to stay consistent with other clk_set_parent() calls. Other than that, Acked-by: Shawn Guo <shawnguo@kernel.org> > /* use old gpt clk setting, gpt1 root clk must be twice as gpt counter freq */ > clk_set_parent(clks[IMX7D_GPT1_ROOT_SRC], clks[IMX7D_OSC_24M_CLK]); > > -- > 2.17.0 >
diff --git a/drivers/clk/imx/clk-imx7d.c b/drivers/clk/imx/clk-imx7d.c index f7f4db2e6fa6..9a1a18ceb132 100644 --- a/drivers/clk/imx/clk-imx7d.c +++ b/drivers/clk/imx/clk-imx7d.c @@ -891,6 +891,9 @@ static void __init imx7d_clocks_init(struct device_node *ccm_node) clk_set_parent(clks[IMX7D_PLL_AUDIO_MAIN_BYPASS], clks[IMX7D_PLL_AUDIO_MAIN]); clk_set_parent(clks[IMX7D_PLL_VIDEO_MAIN_BYPASS], clks[IMX7D_PLL_VIDEO_MAIN]); + clk_set_parent(clks[IMX7D_MIPI_CSI_ROOT_SRC], + clks[IMX7D_PLL_SYS_PFD3_CLK]); + /* use old gpt clk setting, gpt1 root clk must be twice as gpt counter freq */ clk_set_parent(clks[IMX7D_GPT1_ROOT_SRC], clks[IMX7D_OSC_24M_CLK]);
To guarantee that we do not get Overflow in image FIFO the outer bandwidth has to be faster than inputer bandwidth. For that it must be possible to set a faster frequency clock. So set new parent to sys_pfd3 clock for the mipi csi block. Cc: linux-clk@vger.kernel.org Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> --- drivers/clk/imx/clk-imx7d.c | 3 +++ 1 file changed, 3 insertions(+)