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authorPhilipp Zabel <p.zabel@pengutronix.de>2013-04-08 18:04:34 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-09 16:16:16 -0700
commitdb5225d4050d5ef4bd7e9aced161c87d6a90decc (patch)
treeae60c3b5b1af07fcb415ba6d5470daa9ccfc62fc
parentb60b5bcb181fd420a5b1d0993b45f4241b8f1014 (diff)
downloadlinaro-lsk-db5225d4050d5ef4bd7e9aced161c87d6a90decc.tar.gz
staging: drm/imx: ipu-di: add comments explaining signal generator configuration
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/staging/imx-drm/ipu-v3/ipu-di.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-di.c b/drivers/staging/imx-drm/ipu-v3/ipu-di.c
index ec340da968a..26534b770f5 100644
--- a/drivers/staging/imx-drm/ipu-v3/ipu-di.c
+++ b/drivers/staging/imx-drm/ipu-v3/ipu-di.c
@@ -413,9 +413,11 @@ static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
sig->v_end_width;
struct di_sync_config cfg[] = {
{
+ /* 1: INT_HSYNC */
.run_count = h_total - 1,
.run_src = DI_SYNC_CLK,
} , {
+ /* PIN2: HSYNC */
.run_count = h_total - 1,
.run_src = DI_SYNC_CLK,
.offset_count = div * sig->v_to_h_sync,
@@ -424,23 +426,28 @@ static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
.cnt_polarity_trigger_src = DI_SYNC_CLK,
.cnt_down = sig->h_sync_width * 2,
} , {
+ /* PIN3: VSYNC */
.run_count = v_total - 1,
.run_src = DI_SYNC_INT_HSYNC,
.cnt_polarity_gen_en = 1,
.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
.cnt_down = sig->v_sync_width * 2,
} , {
+ /* 4: Line Active */
.run_src = DI_SYNC_HSYNC,
.offset_count = sig->v_sync_width + sig->v_start_width,
.offset_src = DI_SYNC_HSYNC,
.repeat_count = sig->height,
.cnt_clr_src = DI_SYNC_VSYNC,
} , {
+ /* 5: DE, referenced by DC */
.run_src = DI_SYNC_CLK,
.offset_count = sig->h_sync_width + sig->h_start_width,
.offset_src = DI_SYNC_CLK,
.repeat_count = sig->width,
- .cnt_clr_src = 5,
+ .cnt_clr_src = 5, /* Line Active */
+ } , {
+ /* unused */
} , {
/* unused */
} , {