Hi Maxime,

On Tue, Aug 16, 2022 at 3:20 PM Maxime Ripard [off-list ref] wrote:

On Fri, Aug 12, 2022 at 03:25:18PM +0200, Geert Uytterhoeven wrote:

quoted

quoted

--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c

@@ -1649,11 +1650,40 @@ EXPORT_SYMBOL(drm_mode_create_tv_margin_properties);
  * 0 on success or a negative error code on failure.
  */
 int drm_mode_create_tv_properties(struct drm_device *dev,
+                                 unsigned int supported_tv_norms,
                                  unsigned int num_modes,
                                  const char * const modes[])
 {
+       static const struct drm_prop_enum_list tv_norm_values[] = {
+               { __builtin_ffs(DRM_MODE_TV_NORM_NTSC_443) - 1, "NTSC-443" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_NTSC_J) - 1, "NTSC-J" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_NTSC_M) - 1, "NTSC-M" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_60) - 1, "PAL-60" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_B) - 1, "PAL-B" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_D) - 1, "PAL-D" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_G) - 1, "PAL-G" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_H) - 1, "PAL-H" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_I) - 1, "PAL-I" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_M) - 1, "PAL-M" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_N) - 1, "PAL-N" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_PAL_NC) - 1, "PAL-Nc" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_60) - 1, "SECAM-60" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_B) - 1, "SECAM-B" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_D) - 1, "SECAM-D" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_G) - 1, "SECAM-G" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_K) - 1, "SECAM-K" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_K1) - 1, "SECAM-K1" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_SECAM_L) - 1, "SECAM-L" },

The above are analog standards, with a variable horizontal resolution.

quoted

+               { __builtin_ffs(DRM_MODE_TV_NORM_HD480I) - 1, "hd480i" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_HD480P) - 1, "hd480p" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_HD576I) - 1, "hd576i" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_HD576P) - 1, "hd576p" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_HD720P) - 1, "hd720p" },
+               { __builtin_ffs(DRM_MODE_TV_NORM_HD1080I) - 1, "hd1080i" },

The above are digital standards, with a fixed resolution.

Are they?

It's not clear to me from looking at nouveau, but I was under the
impression that they were modes for a component output, so CEA 770.3. I
don't have the spec though, so I can't check.

Oh right, I forgot about analog HD over component, where you can use
other pixel clocks than in the digital standard.

quoted

You seem to have missed "hd1080p"?

Nobody is using it. If we ever have a driver that uses it I think we can
add it.

The PS3 supports 1080p over component
https://manuals.playstation.net/document/en/ps3/current/settings/videooutput.html

quoted

In addition, "hd720p", "hd080i", and "hd1080p" are available in both 50
and 60 (actually 59.94) Hz, while "hd1080p" can also use 24 or 25 Hz.

It looks like nouveau only exposes modes for 480p at 59.94Hz, 576p at
50Hz, 720p at 60Hz, 1080i at 30Hz.

PS3 supports both 50 and 60 Hz (same link above).

quoted

Either you have to add them here (e.g. "hd720p50" and "hd720p60"), or
handle them through "@<refresh>".  The latter would impact "[PATCH v1
09/35] drm/modes: Move named modes parsing to a separate function", as
currently a named mode and a refresh rate can't be specified both.

I think the former would make more sense. It simplifies a bit the
parser, and we're going to use a named mode anyway.

quoted

As "[PATCH v1 34/35] drm/modes: Introduce the tv_mode property as a
command-line option" uses a separate "tv_mode" option, and not the main
mode name, I think you want to add them here.

It's a separate story I think, we could have a named mode hd720p50,
which would be equivalent to 1280x720,tv_mode=hd720p

So where's the field rate in "1280x720,tv_mode=hd720p"?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

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