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drm/modes: Parse overscan properties

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Properly configuring the overscan properties might be needed for the
initial setup of the framebuffer for display that still have overscan.
Let's allow for more properties on the kernel command line to setup each
margin.

Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e481f1628e3768ca49226ec2115cfa4dfcbd5e4c.1560783090.git-series.maxime.ripard@bootlin.com
This commit is contained in:
Maxime Ripard
2019-06-19 12:17:51 +02:00
parent 22045e8e52
commit 3d46a3007c
3 changed files with 51 additions and 0 deletions
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44
drivers/gpu/drm/drm_modes.c
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@@ -1609,6 +1609,50 @@ static int drm_mode_parse_cmdline_options(char *str, size_t len,
} else if (!strncmp(option, "reflect_y", delim - option)) {
rotation |= DRM_MODE_REFLECT_Y;
sep = delim;
} else if (!strncmp(option, "margin_right", delim - option)) {
const char *value = delim + 1;
unsigned int margin;
margin = simple_strtol(value, &sep, 10);
/* Make sure we have parsed something */
if (sep == value)
return -EINVAL;
mode->tv_margins.right = margin;
} else if (!strncmp(option, "margin_left", delim - option)) {
const char *value = delim + 1;
unsigned int margin;
margin = simple_strtol(value, &sep, 10);
/* Make sure we have parsed something */
if (sep == value)
return -EINVAL;
mode->tv_margins.left = margin;
} else if (!strncmp(option, "margin_top", delim - option)) {
const char *value = delim + 1;
unsigned int margin;
margin = simple_strtol(value, &sep, 10);
/* Make sure we have parsed something */
if (sep == value)
return -EINVAL;
mode->tv_margins.top = margin;
} else if (!strncmp(option, "margin_bottom", delim - option)) {
const char *value = delim + 1;
unsigned int margin;
margin = simple_strtol(value, &sep, 10);
/* Make sure we have parsed something */
if (sep == value)
return -EINVAL;
mode->tv_margins.bottom = margin;
} else {
return -EINVAL;
}