On 08/06/16 09:40, Daniel Vetter wrote:
On Wed, Jun 08, 2016 at 01:57:44PM +0530, Akshu Agrawal wrote:
CHV pipe C hits underrun when we get -ve X values of cursor. To avoid
this we crop the cursor image for by -ve X value and thus use '0' as
least X value.
You're talking about "-ve" here and there's absolutely no "-ve" anywhere
in your patch. That makes your commit message non-understandable.
That's shorthand for "negative", and some of the code below is indeed
testing for a negative X coordinate, e.g:
[snip]
+ /*
+ * There is an issue in CHV PIPE C where we hit underrun on
+ * -ve value of cursor. To avoid this we are cropping the
+ * image for all PIPE C -ve values.
+ */
+ if (IS_CHERRYVIEW(plane->dev)) {
+ if (pipe == PIPE_C && state->visible &&
+ state->base.crtc_x < 0) {
+ ret = vlv_cursor_crop(state, crtc_prev_x);
+ if (ret)
+ return -ENOMEM;
+ } else if (crtc_prev_x < 0) { /* Restore the image back */
+ char __iomem *base;
+ char __iomem *org_image = state->vlv_cursor_image;
+ int size = obj->base.size;
+
+ if (org_image == NULL)
+ return -ENOMEM;
+ base = vlv_pin_and_map_buffer_obj(obj);
+ if (base == NULL)
+ return -ENOMEM;
+ memcpy(base, org_image, size);
+ vlv_unpin_buffer_obj(obj, base);
+ }
+ }
HTH,
.Dave.
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