[Intel-gfx] [PATCH] drm/i915/fbdev: Implement wrappers for callbacks used by fbcon

[Jouni Högander]

After disconnecting damage worker from update logic our dirty callback
is not called on fbcon events. This is causing problems to features
(PSR, FBC, DRRS) relying on dirty callback getting called and breaking
fb console when these features are in use.

Implement wrappers for callbacks used by fbcon and call our dirty
callback in those.

Fixes: f231af498c29 ("drm/fb-helper: Disconnect damage worker from update logic")
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
---
 drivers/gpu/drm/i915/display/intel_fbdev.c | 53 ++++++++++++++++++++--
 1 file changed, 49 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 19f3b5d92a55..b1653624552e 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -77,6 +77,18 @@ static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
 	intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
 }
 
+static void intel_fbdev_dirty(struct fb_info *info)
+{
+	struct drm_fb_helper *helper = info->par;
+
+	/*
+	 * Intel_fb dirty implementation doesn't use damage clips ->
+	 * no need to pass them here
+	 */
+	if (helper->fb->funcs->dirty)
+		helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, NULL, 0);
+}
+
 static int intel_fbdev_set_par(struct fb_info *info)
 {
 	struct drm_fb_helper *fb_helper = info->par;
@@ -91,6 +103,39 @@ static int intel_fbdev_set_par(struct fb_info *info)
 	return ret;
 }
 
+static ssize_t intel_fbdev_write(struct fb_info *info, const char __user *buf,
+				 size_t count, loff_t *ppos)
+{
+	int ret;
+
+	ret = drm_fb_helper_cfb_write(info, buf, count, ppos);
+	if (ret > 0)
+		intel_fbdev_dirty(info);
+
+	return ret;
+}
+
+static void intel_fbdev_fillrect(struct fb_info *info,
+				  const struct fb_fillrect *rect)
+{
+	drm_fb_helper_cfb_fillrect(info, rect);
+	intel_fbdev_dirty(info);
+}
+
+static void intel_fbdev_copyarea(struct fb_info *info,
+				  const struct fb_copyarea *area)
+{
+	drm_fb_helper_cfb_copyarea(info, area);
+	intel_fbdev_dirty(info);
+}
+
+static void intel_fbdev_imageblit(struct fb_info *info,
+				 const struct fb_image *image)
+{
+	drm_fb_helper_cfb_imageblit(info, image);
+	intel_fbdev_dirty(info);
+}
+
 static int intel_fbdev_blank(int blank, struct fb_info *info)
 {
 	struct drm_fb_helper *fb_helper = info->par;
@@ -125,10 +170,10 @@ static const struct fb_ops intelfb_ops = {
 	DRM_FB_HELPER_DEFAULT_OPS,
 	.fb_set_par = intel_fbdev_set_par,
 	.fb_read = drm_fb_helper_cfb_read,
-	.fb_write = drm_fb_helper_cfb_write,
-	.fb_fillrect = drm_fb_helper_cfb_fillrect,
-	.fb_copyarea = drm_fb_helper_cfb_copyarea,
-	.fb_imageblit = drm_fb_helper_cfb_imageblit,
+	.fb_write = intel_fbdev_write,
+	.fb_fillrect = intel_fbdev_fillrect,
+	.fb_copyarea = intel_fbdev_copyarea,
+	.fb_imageblit = intel_fbdev_imageblit,
 	.fb_pan_display = intel_fbdev_pan_display,
 	.fb_blank = intel_fbdev_blank,
 };
-- 
2.34.1