drm/amd/display: Introduce DML2

[Colin King (gmail)]

Hi,

Static analysis on linux-next has found a potential issue in function 
dml_rq_dlg_get_rq_reg in 
drivers/gpu/drm/amd/display/dc/dml2/dml_display_rq_dlg_calc.c

The issue is as follows:

         if (min_meta_chunk_bytes == 0)
                 rq_regs->rq_regs_l.min_meta_chunk_size = 0;
         else
                 rq_regs->rq_regs_l.min_meta_chunk_size = 
(dml_uint_t)(dml_log2((dml_float_t) min_meta_chunk_bytes) - 6 + 1);

         if ( == 0)
                 rq_regs->rq_regs_c.min_meta_chunk_size = 0;
         else
                 rq_regs->rq_regs_c.min_meta_chunk_size = 
(dml_uint_t)(dml_log2((dml_float_t) p1_min_meta_chunk_bytes) - 6 + 1);

it appears that the second if statement is checking for 
min_meta_chunk_bytes == 0 and I think it should be in fact checking for 
p1_min_meta_chunk_bytes == 0 instead. I don't have the hardware so I 
can't test this hypothesis.

Regards,

Colin