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output-xrandr: Add support for the "max bpc" KMS connector property

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Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2412>
This commit is contained in:
Daniel van Vugt 2022-06-10 16:34:40 +08:00 committed by Marge Bot
parent 978cbe2da4
commit 99d84ae1cc
1 changed files with 88 additions and 0 deletions
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88
src/backends/x11/meta-output-xrandr.c
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@ -145,11 +145,28 @@ output_set_underscanning_xrandr (MetaOutput *output,
}
}
static void
output_set_max_bpc_xrandr (MetaOutput *output,
unsigned int max_bpc)
{
Display *xdisplay = xdisplay_from_output (output);
Atom prop = XInternAtom (xdisplay, "max bpc", False);
uint32_t value = max_bpc;
xcb_randr_change_output_property (XGetXCBConnection (xdisplay),
(XID) meta_output_get_id (output),
prop, XCB_ATOM_INTEGER, 32,
XCB_PROP_MODE_REPLACE,
1, &value);
}
void
meta_output_xrandr_apply_mode (MetaOutputXrandr *output_xrandr)
{
MetaOutput *output = META_OUTPUT (output_xrandr);
Display *xdisplay = xdisplay_from_output (output);
const MetaOutputInfo *output_info = meta_output_get_info (output);
unsigned int max_bpc;
if (meta_output_is_primary (output))
{
@ -164,6 +181,13 @@ meta_output_xrandr_apply_mode (MetaOutputXrandr *output_xrandr)
output_set_underscanning_xrandr (output,
meta_output_is_underscanning (output));
}
if (meta_output_get_max_bpc (output, &max_bpc) &&
max_bpc >= output_info->max_bpc_min &&
max_bpc <= output_info->max_bpc_max)
{
output_set_max_bpc_xrandr (output, max_bpc);
}
}
static int
@ -347,6 +371,33 @@ output_get_underscanning_xrandr (MetaOutput *output)
return (strcmp (str, "on") == 0);
}
static gboolean
output_get_max_bpc_xrandr (MetaOutput *output,
unsigned int *max_bpc)
{
Display *xdisplay = xdisplay_from_output (output);
Atom atom, actual_type;
int actual_format;
unsigned long nitems, bytes_after;
g_autofree unsigned char *buffer = NULL;
atom = XInternAtom (xdisplay, "max bpc", False);
XRRGetOutputProperty (xdisplay,
(XID) meta_output_get_id (output),
atom,
0, G_MAXLONG, False, False, XCB_ATOM_INTEGER,
&actual_type, &actual_format,
&nitems, &bytes_after, &buffer);
if (actual_type != XCB_ATOM_INTEGER || actual_format != 32 || nitems < 1)
return FALSE;
if (max_bpc)
*max_bpc = *((uint32_t*) buffer);
return TRUE;
}
static gboolean
output_get_supports_underscanning_xrandr (Display *xdisplay,
RROutput output_id)
@ -392,6 +443,36 @@ output_get_supports_underscanning_xrandr (Display *xdisplay,
return supports_underscanning;
}
static gboolean
output_get_max_bpc_range_xrandr (Display *xdisplay,
RROutput output_id,
unsigned int *min,
unsigned int *max)
{
Atom atom;
XRRPropertyInfo *property_info;
long *values;
atom = XInternAtom (xdisplay, "max bpc", False);
meta_clutter_x11_trap_x_errors ();
property_info = XRRQueryOutputProperty (xdisplay,
(XID) output_id,
atom);
meta_clutter_x11_untrap_x_errors ();
if (!property_info || property_info->num_values != 2)
return FALSE;
values = (long *) property_info->values;
if (min)
*min = values[0];
if (max)
*max = values[1];
return TRUE;
}
static gboolean
output_get_supports_color_transform_xrandr (Display *xdisplay,
RROutput output_id)
@ -934,6 +1015,10 @@ meta_output_xrandr_new (MetaGpuXrandr *gpu_xrandr,
output_info->supports_underscanning =
output_get_supports_underscanning_xrandr (xdisplay, output_id);
output_get_max_bpc_range_xrandr (xdisplay,
output_id,
&output_info->max_bpc_min,
&output_info->max_bpc_max);
output_info->supports_color_transform =
output_get_supports_color_transform_xrandr (xdisplay, output_id);
output_info_init_backlight_limits_xrandr (output_info, xdisplay, output_id);
@ -954,6 +1039,9 @@ meta_output_xrandr_new (MetaGpuXrandr *gpu_xrandr,
.is_presentation = output_get_presentation_xrandr (output),
.is_underscanning = output_get_underscanning_xrandr (output),
};
output_assignment.has_max_bpc =
output_get_max_bpc_xrandr (output, &output_assignment.max_bpc);
meta_output_assign_crtc (output, assigned_crtc, &output_assignment);
}
else