drm: gma500: Replace drm_fb_get_bpp_depth() with drm_format_info()

The driver uses drm_fb_get_bpp_depth() to check whether it can support
the format requested by userspace when creating a framebuffer. This
isn't the right API, as it doesn't differentiate between RGB formats
other than on a depth and bpp basis.

Fixing this requires non trivial changes to the drivers internals. As a
first step, replace usage of the drm_fb_get_bpp_depth() function with an
equivalent check based on drm_format_info(). This is part of a wider
effort to remove usage of the drm_fb_get_bpp_depth() function in
drivers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1476744081-24485-9-git-send-email-laurent.pinchart@ideasonboard.com

1 files changed, 9 insertions, 11 deletions

diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index aee2f9733457..97daf23f3fef 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -236,22 +236,20 @@ static int psb_framebuffer_init(struct drm_device *dev,
                                         const struct drm_mode_fb_cmd2 *mode_cmd,
                                         struct gtt_range *gt)
 {
-        u32 bpp, depth;
+        const struct drm_format_info *info;
         int ret;
 
-        drm_fb_get_bpp_depth(mode_cmd->pixel_format, &depth, &bpp);
+        /*
+         * Reject unknown formats, YUV formats, and formats with more than
+         * 4 bytes per pixel.
+         */
+        info = drm_format_info(mode_cmd->pixel_format);
+        if (!info || !info->depth || info->cpp[0] > 4)
+                return -EINVAL;
 
         if (mode_cmd->pitches[0] & 63)
                 return -EINVAL;
-        switch (bpp) {
-        case 8:
-        case 16:
-        case 24:
-        case 32:
-                break;
-        default:
-                return -EINVAL;
-        }
+
         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
         fb->gtt = gt;
         ret = drm_framebuffer_init(dev, &fb->base, &psb_fb_funcs);