USA recently won a dispute against India at the WTO. The dispute was regarding subsidies given by the Indian govt to local solar module/cell manufacturers. Jawaharlal Nehru National Solar Mission (NSM) had mandated that certain portion of the materials under this initiative be procured locally. Subsidies were to be given to comply with this regulation. USA had alleged that such subsidies discriminate against foreign suppliers of solar cells & modules.
Here is the link to the WTO dispute details.
Here is the link to a news article regarding this verdict