drm/fb: add setcmap and fix 8-bit support.

This adds support for the setcmap api and fixes the 8bpp
support at least on radeon hardware. It adds a new load_lut
hook which can be called once the color map is setup.

Signed-off-by: Dave Airlie <airlied@redhat.com>

8 files changed, 63 insertions, 8 deletions

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 819ddcbfcce5..3746bd2f0f08 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -454,6 +454,48 @@ out_free:
 }
 EXPORT_SYMBOL(drm_fb_helper_init_crtc_count);
 
+int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
+{
+        struct drm_fb_helper *fb_helper = info->par;
+        struct drm_device *dev = fb_helper->dev;
+        u16 *red, *green, *blue, *transp;
+        struct drm_crtc *crtc;
+        int i, rc = 0;
+        int start;
+
+        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+                struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+                for (i = 0; i < fb_helper->crtc_count; i++) {
+                        if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
+                                break;
+                }
+                if (i == fb_helper->crtc_count)
+                        continue;
+
+                red = cmap->red;
+                green = cmap->green;
+                blue = cmap->blue;
+                transp = cmap->transp;
+                start = cmap->start;
+
+                for (i = 0; i < cmap->len; i++) {
+                        u16 hred, hgreen, hblue, htransp = 0xffff;
+
+                        hred = *red++;
+                        hgreen = *green++;
+                        hblue = *blue++;
+
+                        if (transp)
+                                htransp = *transp++;
+
+                        fb_helper->funcs->gamma_set(crtc, hred, hgreen, hblue, start++);
+                }
+                crtc_funcs->load_lut(crtc);
+        }
+        return rc;
+}
+EXPORT_SYMBOL(drm_fb_helper_setcmap);
+
 int drm_fb_helper_setcolreg(unsigned regno,
                             unsigned red,
                             unsigned green,
@@ -485,20 +527,21 @@ int drm_fb_helper_setcolreg(unsigned regno,
                 }
 
                 if (regno < 16) {
+                        u32 *pal = fb->pseudo_palette;
                         switch (fb->depth) {
                         case 15:
-                                fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
+                                pal[regno] = ((red & 0xf800) >> 1) |
                                         ((green & 0xf800) >>  6) |
                                         ((blue & 0xf800) >> 11);
                                 break;
                         case 16:
-                                fb->pseudo_palette[regno] = (red & 0xf800) |
+                                pal[regno] = (red & 0xf800) |
                                         ((green & 0xfc00) >>  5) |
                                         ((blue  & 0xf800) >> 11);
                                 break;
                         case 24:
                         case 32:
-                                fb->pseudo_palette[regno] =
+                                pal[regno] =
                                         (((red >> 8) & 0xff) << info->var.red.offset) |
                                         (((green >> 8) & 0xff) << info->var.green.offset) |
                                         (((blue >> 8) & 0xff) << info->var.blue.offset);
@@ -851,10 +894,12 @@ void drm_fb_helper_free(struct drm_fb_helper *helper)
 }
 EXPORT_SYMBOL(drm_fb_helper_free);
 
-void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch)
+void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
+                            uint32_t depth)
 {
         info->fix.type = FB_TYPE_PACKED_PIXELS;
-        info->fix.visual = FB_VISUAL_TRUECOLOR;
+        info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
+                FB_VISUAL_TRUECOLOR;
         info->fix.type_aux = 0;
         info->fix.xpanstep = 1; /* doing it in hw */
         info->fix.ypanstep = 1; /* doing it in hw */
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 155719ff99d1..a840cb1bd36a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3513,6 +3513,7 @@ static const struct drm_crtc_helper_funcs intel_helper_funcs = {
         .mode_set_base = intel_pipe_set_base,
         .prepare = intel_crtc_prepare,
         .commit = intel_crtc_commit,
+        .load_lut = intel_crtc_load_lut,
 };
 
 static const struct drm_crtc_funcs intel_crtc_funcs = {
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index e85d7e9eed7d..3ee8db1fbcd0 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -60,6 +60,7 @@ static struct fb_ops intelfb_ops = {
         .fb_imageblit = cfb_imageblit,
         .fb_pan_display = drm_fb_helper_pan_display,
         .fb_blank = drm_fb_helper_blank,
+        .fb_setcmap = drm_fb_helper_setcmap,
 };
 
 static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
@@ -206,7 +207,7 @@ static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
 
 //      memset(info->screen_base, 0, size);
 
-        drm_fb_helper_fill_fix(info, fb->pitch);
+        drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
         drm_fb_helper_fill_var(info, fb, fb_width, fb_height);
 
         /* FIXME: we really shouldn't expose mmio space at all */
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 6a015929deee..14fa9701aeb3 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -733,6 +733,7 @@ static const struct drm_crtc_helper_funcs atombios_helper_funcs = {
         .mode_set_base = atombios_crtc_set_base,
         .prepare = atombios_crtc_prepare,
         .commit = atombios_crtc_commit,
+        .load_lut = radeon_crtc_load_lut,
 };
 
 void radeon_atombios_init_crtc(struct drm_device *dev,
diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index 325e40b5e0b6..c32f44096fec 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -55,6 +55,7 @@ static struct fb_ops radeonfb_ops = {
         .fb_imageblit = cfb_imageblit,
         .fb_pan_display = drm_fb_helper_pan_display,
         .fb_blank = drm_fb_helper_blank,
+        .fb_setcmap = drm_fb_helper_setcmap,
 };
 
 /**
@@ -239,7 +240,7 @@ int radeonfb_create(struct drm_device *dev,
 
         strcpy(info->fix.id, "radeondrmfb");
 
-        drm_fb_helper_fill_fix(info, fb->pitch);
+        drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 
         info->flags = FBINFO_DEFAULT;
         info->fbops = &radeonfb_ops;
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index 2b997a15fb1f..36410f85d705 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -1053,6 +1053,7 @@ static const struct drm_crtc_helper_funcs legacy_helper_funcs = {
         .mode_set_base = radeon_crtc_set_base,
         .prepare = radeon_crtc_prepare,
         .commit = radeon_crtc_commit,
+        .load_lut = radeon_crtc_load_lut,
 };
 
 
diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
index ef47dfd8e5e9..b29e20168b5f 100644
--- a/include/drm/drm_crtc_helper.h
+++ b/include/drm/drm_crtc_helper.h
@@ -61,6 +61,9 @@ struct drm_crtc_helper_funcs {
         /* Move the crtc on the current fb to the given position *optional* */
         int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
                              struct drm_framebuffer *old_fb);
+
+        /* reload the current crtc LUT */
+        void (*load_lut)(struct drm_crtc *crtc);
 };
 
 struct drm_encoder_helper_funcs {
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 4aa5740ce59f..f1ed08559fc7 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -98,9 +98,11 @@ int drm_fb_helper_setcolreg(unsigned regno,
 void drm_fb_helper_restore(void);
 void drm_fb_helper_fill_var(struct fb_info *info, struct drm_framebuffer *fb,
                             uint32_t fb_width, uint32_t fb_height);
-void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch);
+void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
+                            uint32_t depth);
 
 int drm_fb_helper_add_connector(struct drm_connector *connector);
 int drm_fb_helper_parse_command_line(struct drm_device *dev);
+int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
 
 #endif