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modetest: avoid erroring if there's no gamma legacy support 

Let's follow the Rule of Silence. And while here,
document what's going on.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
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Ezequiel Garcia 2019-10-05 13:31:22 -03:00 committed by Marijn Suijten
parent 45f3d9bab6
commit b709c3010e
1 changed files with 2 additions and 1 deletions
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3
tests/modetest/modetest.c
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@ -1168,6 +1168,7 @@ static void set_gamma(struct device *dev, unsigned crtc_id, unsigned fourcc)
add_property_optional(dev, crtc_id, "DEGAMMA_LUT", 0);
add_property_optional(dev, crtc_id, "CTM", 0);
if (!add_property_optional(dev, crtc_id, "GAMMA_LUT", blob_id)) {
/* If we can't add the GAMMA_LUT property, try the legacy API. */
uint16_t r[256], g[256], b[256];
for (i = 0; i < 256; i++) {
@ -1177,7 +1178,7 @@ static void set_gamma(struct device *dev, unsigned crtc_id, unsigned fourcc)
}
ret = drmModeCrtcSetGamma(dev->fd, crtc_id, 256, r, g, b);
if (ret)
if (ret && errno != ENOSYS)
fprintf(stderr, "failed to set gamma: %s\n", strerror(errno));
}
}