drm: bridge: thc63: Restrict modes based on hardware operating frequency (399d9f2f) · Commits · 戴 / test

drivers/gpu/drm/bridge/thc63lvd1024.c

+18 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,23 @@ static int thc63_attach(struct drm_bridge *bridge)
		return drm_bridge_attach(bridge->encoder, thc63->next, bridge);
		}

		static enum drm_mode_status thc63_mode_valid(struct drm_bridge *bridge,
		const struct drm_display_mode *mode)
		{
		/*
		* The THC63LVD1024 clock frequency range is 8 to 135 MHz in single-in
		* mode. Note that the limits are different in dual-in, single-out mode,
		* and will need to be adjusted accordingly.
		*/
		if (mode->clock < 8000)
		return MODE_CLOCK_LOW;

		if (mode->clock > 135000)
		return MODE_CLOCK_HIGH;

		return MODE_OK;
		}

		static void thc63_enable(struct drm_bridge *bridge)
		{
		struct thc63_dev *thc63 = to_thc63(bridge);
		@@ -77,6 +94,7 @@ static void thc63_disable(struct drm_bridge *bridge)

		static const struct drm_bridge_funcs thc63_bridge_func = {
		.attach = thc63_attach,
		.mode_valid = thc63_mode_valid,
		.enable = thc63_enable,
		.disable = thc63_disable,
		};