disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/nouveau/nouveau_dp.c
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@@ -220,8 +220,6 @@
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 }
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 /* TODO:
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- * - Use the minimum possible BPC here, once we add support for the max bpc
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- *   property.
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  * - Validate against the DP caps advertised by the GPU (we don't check these
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  *   yet)
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  */
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@@ -233,7 +231,11 @@
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 {
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 	const unsigned int min_clock = 25000;
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 	unsigned int max_rate, mode_rate, ds_max_dotclock, clock = mode->clock;
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-	const u8 bpp = connector->display_info.bpc * 3;
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+	/* Check with the minmum bpc always, so we can advertise better modes.
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+	 * In particlar not doing this causes modes to be dropped on HDR
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+	 * displays as we might check with a bpc of 16 even.
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+	 */
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+	const u8 bpp = 6 * 3;
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 	if (mode->flags & DRM_MODE_FLAG_INTERLACE && !outp->caps.dp_interlace)
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 		return MODE_NO_INTERLACE;