media: mexon-ge2d: fixup frames size in registers

The CLIP, SRC & DST registers are coded to take the pixel/line start & end,
starting from 0. Thus the end should be the width/height minus 1.

It can be an issue with clipping and rotation, where it will add spurious
lines from uninitialized or unwanted data with a shift in the result.

Fixes: 59a635327ca7 ("media: meson: Add M2M driver for the Amlogic GE2D Accelerator Unit")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/media/platform/meson/ge2d/ge2d.c b/drivers/media/platform/meson/ge2d/ge2d.c
index ccda18e5a3774e3ef245bb8d37b80de3956cec2e..5e7b319f300dff2ec8042b9ae318315301e3f6ec 100644 (file)
--- a/drivers/media/platform/meson/ge2d/ge2d.c
+++ b/drivers/media/platform/meson/ge2d/ge2d.c
@@ -215,35 +215,35 @@ static void ge2d_hw_start(struct meson_ge2d *ge2d)
 
        regmap_write(ge2d->map, GE2D_SRC1_CLIPY_START_END,
                     FIELD_PREP(GE2D_START, ctx->in.crop.top) |
-                    FIELD_PREP(GE2D_END, ctx->in.crop.top + ctx->in.crop.height));
+                    FIELD_PREP(GE2D_END, ctx->in.crop.top + ctx->in.crop.height - 1));
        regmap_write(ge2d->map, GE2D_SRC1_CLIPX_START_END,
                     FIELD_PREP(GE2D_START, ctx->in.crop.left) |
-                    FIELD_PREP(GE2D_END, ctx->in.crop.left + ctx->in.crop.width));
+                    FIELD_PREP(GE2D_END, ctx->in.crop.left + ctx->in.crop.width - 1));
        regmap_write(ge2d->map, GE2D_SRC2_CLIPY_START_END,
                     FIELD_PREP(GE2D_START, ctx->out.crop.top) |
-                    FIELD_PREP(GE2D_END, ctx->out.crop.top + ctx->out.crop.height));
+                    FIELD_PREP(GE2D_END, ctx->out.crop.top + ctx->out.crop.height - 1));
        regmap_write(ge2d->map, GE2D_SRC2_CLIPX_START_END,
                     FIELD_PREP(GE2D_START, ctx->out.crop.left) |
-                    FIELD_PREP(GE2D_END, ctx->out.crop.left + ctx->out.crop.width));
+                    FIELD_PREP(GE2D_END, ctx->out.crop.left + ctx->out.crop.width - 1));
        regmap_write(ge2d->map, GE2D_DST_CLIPY_START_END,
                     FIELD_PREP(GE2D_START, ctx->out.crop.top) |
-                    FIELD_PREP(GE2D_END, ctx->out.crop.top + ctx->out.crop.height));
+                    FIELD_PREP(GE2D_END, ctx->out.crop.top + ctx->out.crop.height - 1));
        regmap_write(ge2d->map, GE2D_DST_CLIPX_START_END,
                     FIELD_PREP(GE2D_START, ctx->out.crop.left) |
-                    FIELD_PREP(GE2D_END, ctx->out.crop.left + ctx->out.crop.width));
+                    FIELD_PREP(GE2D_END, ctx->out.crop.left + ctx->out.crop.width - 1));
 
        regmap_write(ge2d->map, GE2D_SRC1_Y_START_END,
-                    FIELD_PREP(GE2D_END, ctx->in.pix_fmt.height));
+                    FIELD_PREP(GE2D_END, ctx->in.pix_fmt.height - 1));
        regmap_write(ge2d->map, GE2D_SRC1_X_START_END,
-                    FIELD_PREP(GE2D_END, ctx->in.pix_fmt.width));
+                    FIELD_PREP(GE2D_END, ctx->in.pix_fmt.width - 1));
        regmap_write(ge2d->map, GE2D_SRC2_Y_START_END,
-                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.height));
+                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.height - 1));
        regmap_write(ge2d->map, GE2D_SRC2_X_START_END,
-                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.width));
+                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.width - 1));
        regmap_write(ge2d->map, GE2D_DST_Y_START_END,
-                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.height));
+                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.height - 1));
        regmap_write(ge2d->map, GE2D_DST_X_START_END,
-                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.width));
+                    FIELD_PREP(GE2D_END, ctx->out.pix_fmt.width - 1));
 
        /* Color, no blend, use source color */
        reg = GE2D_ALU_DO_COLOR_OPERATION_LOGIC(LOGIC_OPERATION_COPY,