On Friday 13 September 2013 07:44 PM, Rob Clark wrote:
On Fri, Sep 13, 2013 at 5:14 AM, Archit Taneja <archit@xxxxxx> wrote:
Enable use of DT for DMM/Tiler.
Originally worked on by Andy Gross.
looks good.. but do we want to get information about # of LUT's, etc,
from DT? Or did we decide that we can reliably get this from the hw?
I lost track of that discussion (I guess Andy would remember)..
I am not aware of the discussion either. But looks like we get the LUT
info from the HW registers in omap_dmm_probe:
hwinfo = readl(omap_dmm->base + DMM_PAT_HWINFO);
omap_dmm->num_engines = (hwinfo >> 24) & 0x1F;
omap_dmm->num_lut = (hwinfo >> 16) & 0x1F;
omap_dmm->container_width = 256;
omap_dmm->container_height = 128;
atomic_set(&omap_dmm->engine_counter, omap_dmm->num_engines);
/* read out actual LUT width and height */
pat_geom = readl(omap_dmm->base + DMM_PAT_GEOMETRY);
omap_dmm->lut_width = ((pat_geom >> 16) & 0xF) << 5;
omap_dmm->lut_height = ((pat_geom >> 24) & 0xF) << 5;
/* increment LUT by one if on OMAP5 */
/* LUT has twice the height, and is split into a separate
container */
if (omap_dmm->lut_height != omap_dmm->container_height)
omap_dmm->num_lut++;
Archit
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