drm/sun4i: Use (struct drm_format_info) fields to determine if a format is yuv and...

We do not need sun4i_backend_format_is_packed_yuv422() /
sun4i_backend_format_is_planar_yuv() to determine if the format is yuv multi planar
or not. (struct drm_format_info *)->is_yuv tells if the format is yuv or not.
And (struct drm_format_info *)->num_planes denotes the number of planes.

This issue was identified during a review on a previous patch:-
https://lists.freedesktop.org/archives/dri-devel/2018-July/183840.html

Signed-off-by: Ayan Kumar halder <ayan.halder@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1532336220-3791-1-git-send-email-ayan.halder@arm.com

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index f6d8d0d..bf49c55 100644 (file)
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -63,32 +63,6 @@ static const u32 sunxi_bt601_yuv2rgb_coef[12] = {
        0x000004a7, 0x00000812, 0x00000000, 0x00002eb1,
 };
 
-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 void sun4i_backend_apply_color_correction(struct sunxi_engine *engine)
 {
        int i;
@@ -218,7 +192,8 @@ static int sun4i_backend_update_yuv_format(struct sun4i_backend *backend,
 {
        struct drm_plane_state *state = plane->state;
        struct drm_framebuffer *fb = state->fb;
-       uint32_t format = fb->format->format;
+       const struct drm_format_info *format = fb->format;
+       const uint32_t fmt = format->format;
        u32 val = SUN4I_BACKEND_IYUVCTL_EN;
        int i;
 
@@ -236,16 +211,16 @@ static int sun4i_backend_update_yuv_format(struct sun4i_backend *backend,
                           SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN);
 
        /* TODO: Add support for the multi-planar YUV formats */
-       if (sun4i_backend_format_is_packed_yuv422(format))
+       if (format->num_planes == 1)
                val |= SUN4I_BACKEND_IYUVCTL_FBFMT_PACKED_YUV422;
        else
-               DRM_DEBUG_DRIVER("Unsupported YUV format (0x%x)\n", format);
+               DRM_DEBUG_DRIVER("Unsupported YUV format (0x%x)\n", fmt);
 
        /*
         * Allwinner seems to list the pixel sequence from right to left, while
         * DRM lists it from left to right.
         */
-       switch (format) {
+       switch (fmt) {
        case DRM_FORMAT_YUYV:
                val |= SUN4I_BACKEND_IYUVCTL_FBPS_VYUY;
                break;
@@ -260,7 +235,7 @@ static int sun4i_backend_update_yuv_format(struct sun4i_backend *backend,
                break;
        default:
                DRM_DEBUG_DRIVER("Unsupported YUV pixel sequence (0x%x)\n",
-                                format);
+                                fmt);
        }
 
        regmap_write(backend->engine.regs, SUN4I_BACKEND_IYUVCTL_REG, val);