drm/fb-helper: Remove dead code in setcolreg

DRM fbdev emulation only supports pallete_color with depth == 8, and
truecolor with depth > 8. Handling depth == 16 for palettes is hence
dead code, let's remove it.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1459331485-28376-3-git-send-email-daniel.vetter@ffwll.ch

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 7c2eb75..7590df5 100644 (file)
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1042,7 +1042,6 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
 {
        struct drm_fb_helper *fb_helper = info->par;
        struct drm_framebuffer *fb = fb_helper->fb;
-       int pindex;
 
        if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
                u32 *palette;
@@ -1074,38 +1073,10 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
                    !fb_helper->funcs->gamma_get))
                return -EINVAL;
 
-       pindex = regno;
+       WARN_ON(fb->bits_per_pixel != 8);
 
-       if (fb->bits_per_pixel == 16) {
-               pindex = regno << 3;
+       fb_helper->funcs->gamma_set(crtc, red, green, blue, regno);
 
-               if (fb->depth == 16 && regno > 63)
-                       return -EINVAL;
-               if (fb->depth == 15 && regno > 31)
-                       return -EINVAL;
-
-               if (fb->depth == 16) {
-                       u16 r, g, b;
-                       int i;
-                       if (regno < 32) {
-                               for (i = 0; i < 8; i++)
-                                       fb_helper->funcs->gamma_set(crtc, red,
-                                               green, blue, pindex + i);
-                       }
-
-                       fb_helper->funcs->gamma_get(crtc, &r,
-                                                   &g, &b,
-                                                   pindex >> 1);
-
-                       for (i = 0; i < 4; i++)
-                               fb_helper->funcs->gamma_set(crtc, r,
-                                                           green, b,
-                                                           (pindex >> 1) + i);
-               }
-       }
-
-       if (fb->depth != 16)
-               fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
        return 0;
 }