2015-06-22 21:10 GMT+09:00 Inki Dae <inki.dae@xxxxxxxxxxx>: > On 2015년 06월 22일 20:59, Krzysztof Kozlowski wrote: >> 2015-06-22 20:42 GMT+09:00 Inki Dae <inki.dae@xxxxxxxxxxx>: >>> + Krzysztof >>> >>> On 2015년 06월 22일 18:10, Inki Dae wrote: >>>> On 2015년 06월 12일 21:59, Hyungwon Hwang wrote: >>>>> The clock which was named as 'pll_clk' is actually not the clock source >>>>> of PLL in MIPI DSI. This patch fixes this disagreement. >>>> >>>> Mr. Kukjin and Krzysztof, can you give me Acked-by or Singed-off-by? I'd >>>> like to merge this patch to mainline through drm-next. >> >> Dear Hyungwon Hwang, >> >> Please always CC samsung-soc mailing list on such patches. I won't >> receive it on my personal email if you don't CC the list. The >> get_maintainers.pl gives necessary addresses. >> >> Comment below, >> >>>> >>>> Thanks, >>>> Inki Dae >>>> >>>>> >>>>> Signed-off-by: Hyungwon Hwang <human.hwang@xxxxxxxxxxx> >>>>> --- >>>>> Changes before: >>>>> - Refer https://patchwork.kernel.org/patch/6191811 >>>>> Changes for v6: >>>>> - None >>>>> >>>>> arch/arm/boot/dts/exynos4.dtsi | 2 +- >>>>> 1 file changed, 1 insertion(+), 1 deletion(-) >>>>> >>>>> diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi >>>>> index e20cdc2..1538d7a 100644 >>>>> --- a/arch/arm/boot/dts/exynos4.dtsi >>>>> +++ b/arch/arm/boot/dts/exynos4.dtsi >>>>> @@ -167,7 +167,7 @@ >>>>> phys = <&mipi_phy 1>; >>>>> phy-names = "dsim"; >>>>> clocks = <&clock CLK_DSIM0>, <&clock CLK_SCLK_MIPI0>; >>>>> - clock-names = "bus_clk", "pll_clk"; >>>>> + clock-names = "bus_clk", "sclk_mipi"; >> >> It seems wrong. The driver fetches reference from a name of "pll_clk", >> not "sclk_mipi". Also bindings documentation mentions pll_clk and >> bus_clk only. > > Krzysztof, > > There is your missing point. The driver is already considered for > pll_clk also. See the below codes, > > #define OLD_SCLK_MIPI_CLK_NAME "pll_clk" > ... > > for (i = 0; i < dsi->driver_data->num_clks; i++) { > dsi->clks[i] = devm_clk_get(dev, clk_names[i]); > if (IS_ERR(dsi->clks[i])) { > if (strcmp(clk_names[i], "sclk_mipi") == 0) { > strcpy(clk_names[i], OLD_SCLK_MIPI_CLK_NAME); > i--; > continue; > } > > dev_info(dev, "failed to get the clock: %s\n", > clk_names[i]); > return PTR_ERR(dsi->clks[i]); > } > } > > Above codes make the driver to try to get the pll_clk - defined as > OLD_SCLK_MIPI_CLK_NAME macro - again if getting sclk_mipi clock failed > so there is no problem even though a little bit ugly. > > As you know, we should guarantee the backward compatibility so this > codes check two clock names. I am looking at next-20150622 and file drivers/gpu/drm/exynos/exynos_drm_dsi.c. There is no such code there. There is only pll_clk. No sclk_mipi. Maybe it was changed by other patch... but I haven't received it. Also I cannot find such patch on linux-kernel, linux-arm-kernel and linux-samsung-soc. I cannot ack something that I cannot see :) . If you sent whole patchset to my office address, then I will look at it tomorrow. From home I can only look at LKML patches. Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe devicetree" in
