On 3/7/25 13:23, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> One open-coded division causes a link failure on 32-bit architectures:
>
> ld.lld-21: error: undefined symbol: __aeabi_uldivmod
>>>> referenced by snps_hdmirx.c
>>>> drivers/media/platform/synopsys/hdmirx/snps_hdmirx.o:(hdmirx_query_dv_timings) in archive vmlinux.a
>
> Another one uses do_div() with a temporary variable.
>
> Change both to use div_u64() to avoid the link failure and improve
> readability.
>
> Fixes: 7b59b132ad43 ("media: platform: synopsys: Add support for HDMI input driver")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c b/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c
> index 4ffc86ad6c35..438536d88c7f 100644
> --- a/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c
> +++ b/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.c
> @@ -296,7 +296,7 @@ static void hdmirx_get_timings(struct snps_hdmirx_dev *hdmirx_dev,
> hfp = htotal - hact - hs - hbp;
> vfp = vtotal - vact - vs - vbp;
>
> - fps = (bt->pixelclock + (htotal * vtotal) / 2) / (htotal * vtotal);
> + fps = div_u64(bt->pixelclock + (htotal * vtotal) / 2, htotal * vtotal);
> bt->width = hact;
> bt->height = vact;
> bt->hfrontporch = hfp;
> @@ -396,7 +396,7 @@ static int hdmirx_get_detected_timings(struct snps_hdmirx_dev *hdmirx_dev,
> u32 val, tmdsqpclk_freq, pix_clk;
> unsigned int num_retries = 0;
> u32 field_type, deframer_st;
> - u64 tmp_data, tmds_clk;
> + u64 tmds_clk;
> bool is_dvi_mode;
> int ret;
>
> @@ -418,9 +418,7 @@ static int hdmirx_get_detected_timings(struct snps_hdmirx_dev *hdmirx_dev,
>
> tmdsqpclk_freq = hdmirx_readl(hdmirx_dev, CMU_TMDSQPCLK_FREQ);
> tmds_clk = tmdsqpclk_freq * 4 * 1000;
> - tmp_data = tmds_clk * 24;
> - do_div(tmp_data, hdmirx_dev->color_depth);
> - pix_clk = tmp_data;
> + pix_clk = div_u64(tmds_clk * 24, hdmirx_dev->color_depth);
> bt->pixelclock = pix_clk;
>
> if (hdmirx_dev->pix_fmt == HDMIRX_YUV420)
Hi, thanks for the fix! Hans already merged a similar patch [1].
[1]
https://patchwork.linuxtv.org/project/linux-media/patch/20250306-synopsys-hdmirx-fix-64-div-v1-1-dd5ff38bba5e@xxxxxxxxxx/
--
Best regards,
Dmitry
