Re: [igt-dev] [PATCH i-g-t 1/2] lib/igt_kms.c: modify kmstest_dump_mode to print aspect ratio of a mode

["Nautiyal, Ankit K" <ankit.k.nautiyal@intel.com>]

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Hi Mika,

Thanks for the review.

Please find my comments inline:


On 2/12/2018 8:04 PM, Kahola, Mika wrote:
> On Wed, 2018-01-24 at 18:20 +0530, Nautiyal, Ankit K wrote:
>> From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
>>
>> This patch adds the support to print the aspect ratio of the modes
>> (if provided) along with other mode information.
>>
>> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
>> ---
>>   lib/igt_kms.c | 31 +++++++++++++++++++++++++++++--
>>   1 file changed, 29 insertions(+), 2 deletions(-)
>>
>> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
>> index eb57f4a..585f94d 100644
>> --- a/lib/igt_kms.c
>> +++ b/lib/igt_kms.c
>> @@ -56,6 +56,14 @@
>>   #include "igt_sysfs.h"
>>   #include "sw_sync.h"
>>   
>> +#ifndef DRM_MODE_FLAG_PIC_AR_64_27
>> +#define DRM_MODE_FLAG_PIC_AR_64_27 (3<<19)
>> +#endif
>> +
>> +#ifndef DRM_MODE_FLAG_PIC_AR_256_135
>> +#define DRM_MODE_FLAG_PIC_AR_256_135 (4<<19)
>> +#endif
>> +
> Shouldn't these be defined in /include/uapi/drm/drm_mode.h? Although, I
> wasn't able to find these definitions from that file. Do we have a
> patch under review in drm to fill this gap?

Yes you are right. These macros are introduced in the drm-devel 
patch-series to add aspect-ratio
support in drm layer.
https://patchwork.freedesktop.org/series/33984/ which is under review.

When the kernel patch gets r-b, I will remove these macros from here and 
submit
next patchset for this series.

Regards,
Ankit
>
> Otherwise, the patch looks good.
>
> Acked-by: Mika Kahola <mika.kahola@intel.com>
>
>>   /**
>>    * SECTION:igt_kms
>>    * @short_description: Kernel modesetting support library
>> @@ -491,6 +499,22 @@ static const char *mode_stereo_name(const
>> drmModeModeInfo *mode)
>>   	}
>>   }
>>   
>> +static const char *mode_aspect_name(const drmModeModeInfo *mode)
>> +{
>> +	switch (mode->flags & DRM_MODE_FLAG_PIC_AR_MASK) {
>> +	case DRM_MODE_FLAG_PIC_AR_4_3:
>> +		return "4:3";
>> +	case DRM_MODE_FLAG_PIC_AR_16_9:
>> +		return "16:9";
>> +	case DRM_MODE_FLAG_PIC_AR_64_27:
>> +		return "64:27";
>> +	case DRM_MODE_FLAG_PIC_AR_256_135:
>> +		return "256:135";
>> +	default:
>> +		return NULL;
>> +	}
>> +}
>> +
>>   /**
>>    * kmstest_dump_mode:
>>    * @mode: libdrm mode structure
>> @@ -500,8 +524,9 @@ static const char *mode_stereo_name(const
>> drmModeModeInfo *mode)
>>   void kmstest_dump_mode(drmModeModeInfo *mode)
>>   {
>>   	const char *stereo = mode_stereo_name(mode);
>> +	const char *aspect_ratio = mode_aspect_name(mode);
>>   
>> -	igt_info("  %s %d %d %d %d %d %d %d %d %d 0x%x 0x%x
>> %d%s%s%s\n",
>> +	igt_info("  %s %d %d %d %d %d %d %d %d %d 0x%x 0x%x %d%s%s%s
>> %s%s%s\n",
>>   		 mode->name, mode->vrefresh,
>>   		 mode->hdisplay, mode->hsync_start,
>>   		 mode->hsync_end, mode->htotal,
>> @@ -509,7 +534,9 @@ void kmstest_dump_mode(drmModeModeInfo *mode)
>>   		 mode->vsync_end, mode->vtotal,
>>   		 mode->flags, mode->type, mode->clock,
>>   		 stereo ? " (3D:" : "",
>> -		 stereo ? stereo : "", stereo ? ")" : "");
>> +		 stereo ? stereo : "", stereo ? ")" : "",
>> +		 aspect_ratio ? " (Pixel Aspect Ratio:" : "",
>> +		 aspect_ratio ? aspect_ratio : "", aspect_ratio ?
>> ")" : "");
>>   }
>>   
>>   /**


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