From: Maxime Ripard <maxime.ripard@bootlin.com>
Date: Thu, 1 Mar 2018 20:18:45 +0100
Subject: drm/sun4i: backend: Check that we only have a single YUV plane
Git-commit: 32463556a634f3e262581ed348705081706fccd0
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Just like for the frontend, a single plane can use a YUV format. Make sure
we have that constraint covered in our atomic_check.
This is preliminary to the actual YUV support to make sure we don't end up
in an impossible to support situation.
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2f8586493d9139b12efe7e94f65e9a149f818e0e.1519931807.git-series.maxime.ripard@bootlin.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/sun4i/sun4i_backend.c | 49 ++++++++++++++++++++++++++++++++--
drivers/gpu/drm/sun4i/sun4i_backend.h | 1
2 files changed, 48 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -42,6 +42,38 @@ static const u32 sunxi_rgb2yuv_coef[12]
0x000001c1, 0x00003e88, 0x00003fb8, 0x00000808
};
+static inline bool sun4i_backend_format_is_planar_yuv(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_YUV411:
+ case DRM_FORMAT_YUV422:
+ case DRM_FORMAT_YUV444:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool sun4i_backend_format_is_packed_yuv422(uint32_t format)
+{
+ switch (format) {
+ case DRM_FORMAT_YUYV:
+ case DRM_FORMAT_YVYU:
+ case DRM_FORMAT_UYVY:
+ case DRM_FORMAT_VYUY:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static inline bool sun4i_backend_format_is_yuv(uint32_t format)
+{
+ return sun4i_backend_format_is_planar_yuv(format) ||
+ sun4i_backend_format_is_packed_yuv422(format);
+}
+
static void sun4i_backend_apply_color_correction(struct sunxi_engine *engine)
{
int i;
@@ -330,6 +362,7 @@ static int sun4i_backend_atomic_check(st
unsigned int num_planes = 0;
unsigned int num_alpha_planes = 0;
unsigned int num_frontend_planes = 0;
+ unsigned int num_yuv_planes = 0;
unsigned int current_pipe = 0;
unsigned int i;
@@ -362,6 +395,11 @@ static int sun4i_backend_atomic_check(st
if (fb->format->has_alpha)
num_alpha_planes++;
+ if (sun4i_backend_format_is_yuv(fb->format->format)) {
+ DRM_DEBUG_DRIVER("Plane FB format is YUV\n");
+ num_yuv_planes++;
+ }
+
DRM_DEBUG_DRIVER("Plane zpos is %d\n",
plane_state->normalized_zpos);
@@ -430,13 +468,20 @@ static int sun4i_backend_atomic_check(st
s_state->pipe = current_pipe;
}
+ /* We can only have a single YUV plane at a time */
+ if (num_yuv_planes > SUN4I_BACKEND_NUM_YUV_PLANES) {
+ DRM_DEBUG_DRIVER("Too many planes with YUV, rejecting...\n");
+ return -EINVAL;
+ }
+
if (num_frontend_planes > SUN4I_BACKEND_NUM_FRONTEND_LAYERS) {
DRM_DEBUG_DRIVER("Too many planes going through the frontend, rejecting\n");
return -EINVAL;
}
- DRM_DEBUG_DRIVER("State valid with %u planes, %u alpha, %u video\n",
- num_planes, num_alpha_planes, num_frontend_planes);
+ DRM_DEBUG_DRIVER("State valid with %u planes, %u alpha, %u video, %u YUV\n",
+ num_planes, num_alpha_planes, num_frontend_planes,
+ num_yuv_planes);
return 0;
}
--- a/drivers/gpu/drm/sun4i/sun4i_backend.h
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.h
@@ -149,6 +149,7 @@
#define SUN4I_BACKEND_NUM_LAYERS 4
#define SUN4I_BACKEND_NUM_ALPHA_LAYERS 1
#define SUN4I_BACKEND_NUM_FRONTEND_LAYERS 1
+#define SUN4I_BACKEND_NUM_YUV_PLANES 1
struct sun4i_backend {
struct sunxi_engine engine;