Le lundi 23 décembre 2024 à 16:21 +0530, Dikshita Agarwal a écrit : > > On 12/23/2024 4:00 PM, Mauro Carvalho Chehab wrote: > > Em Thu, 12 Dec 2024 17:21:49 +0530 > > Dikshita Agarwal <quic_dikshita@xxxxxxxxxxx> escreveu: > > > > > + .dma_mask = GENMASK(31, 29) - 1, > > > > Setting a mask to GENMASK() - 1 sounds weird. Is it really what you want? > > I so, why? > > > Hi Mauro, > > the value of this dma mask should be 0xe0000000 -1. > > The background for the same is, 0xe0000000 onward memory space is allocated > for IO register space so we are restricting the driver buffer allocations > to 0xe0000000 - 1. > > Based on the comments received in the past, we are using GENMASK to > generate 0xe0000000. > > Does this answer your query or I missed something? I'm not sure it will do what you want. (0xe0000000 -1) matches ~BIT(29). Perhaps you wanted to use ~0xe0000000. Nicolas > > Thanks, > Dikshita > > Thanks, > > Mauro
