On Sat, Apr 02, 2016 at 11:08:06AM +0100, Paul Parsons wrote:
> Three of the VESA DMT timings in edid_est_modes[] are slightly off.
> 1. 640x480@72Hz vsync_end should be 492, not 491.
> 2. 640x480@60Hz clock should be 25175, not 25200.
> 3. 1024x768@75Hz clock should be 78750, not 78800.
> This patch corrects those timings per the VESA DMT specification, and
> thus brings them into line with the identical timings in drm_dmt_modes[].
>
> Signed-off-by: Paul Parsons <lost.distance@xxxxxxxxx>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
I also noticed a discrepancy with the 1024x768i 87Hz 8514/A mode. The
front porch for this particular mode should be 4 lines per field, so
8 lines for the frame. The EST timing looks correct, but the DMT one
is wrong (only accounts for one field). Care to send a patch to fix
that one as well?
> ---
>
> diff -ru a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> --- a/drivers/gpu/drm/drm_edid.c 2016-03-14 04:28:54.000000000 +0000
> +++ b/drivers/gpu/drm/drm_edid.c 2016-04-02 10:29:30.178958556 +0100
> @@ -521,12 +521,12 @@
> 720, 840, 0, 480, 481, 484, 500, 0,
> DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
> { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
> - 704, 832, 0, 480, 489, 491, 520, 0,
> + 704, 832, 0, 480, 489, 492, 520, 0,
> DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
> { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
> 768, 864, 0, 480, 483, 486, 525, 0,
> DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
> - { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
> + { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
> 752, 800, 0, 480, 490, 492, 525, 0,
> DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
> { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
> @@ -538,7 +538,7 @@
> { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
> 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
> DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
> - { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
> + { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78750, 1024, 1040,
> 1136, 1312, 0, 768, 769, 772, 800, 0,
> DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
> { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
>
>
>
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--
Ville Syrjälä
Intel OTC
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