Re: [PATCH 04/29] drm/i915: Dump 'output_types' in crtc state dump

Chris Wilson
2017-09-18T18:43:51Z

Quoting Ville Syrjala (2017-09-18 19:25:39)
> From: Ville Syrjälä <ville.syrjala@linux.intel.com>
>
> To make it easier to debug things let's dump the output types bitmask in
> the crtc state dump. And to make life that much better, let's pretty
> print it as a a human reaadable string as well.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 50 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 50 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 8599e425abb1..192b07a92e76 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -10683,6 +10683,53 @@ intel_dump_m_n_config(struct intel_crtc_state *pipe_config, char *id,
> m_n->link_m, m_n->link_n, m_n->tu);
> }
>
> +#define OUTPUT_TYPE(x) [INTEL_OUTPUT_ ## x] = #x
> +
> +static const char * const output_type_str[] = {
> + OUTPUT_TYPE(UNUSED),
> + OUTPUT_TYPE(ANALOG),
> + OUTPUT_TYPE(DVO),
> + OUTPUT_TYPE(SDVO),
> + OUTPUT_TYPE(LVDS),
> + OUTPUT_TYPE(TVOUT),
> + OUTPUT_TYPE(HDMI),
> + OUTPUT_TYPE(DP),
> + OUTPUT_TYPE(EDP),
> + OUTPUT_TYPE(DSI),
> + OUTPUT_TYPE(UNKNOWN),
> + OUTPUT_TYPE(DP_MST),
> +};
> +
> +static const char *output_types_str(unsigned int output_types)
> +{
> + static char buf[64];

Bleh. Push to caller?

> + size_t len = sizeof(buf);
> + char *str = buf;
> + int i;
> +
> + str[0] = '\0';
> +
> + for (i = 0; i < ARRAY_SIZE(output_type_str); i++) {
> + int r;
> +
> + if ((output_types & BIT(i)) == 0)
> + continue;
> +
> + r = snprintf(str, len, "%s%s",
> + str != buf ? "," : "", output_type_str[i]);

No space after the comma? Heathen.
-Chris