fbdev: mxsfb: use framebuffer_alloc in the correct way

framebuffer_alloc allocated the fb_info struct plus the extra
par and set fb_info->par pointer equal to this extra par. We
can refer the mxcfb_info from fb_info->par

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Tested-by: Stefan Agner <stefan@agner.ch>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/mxsfb.c

@@ -169,7 +169,6 @@ struct mxsfb_devdata {
 };
 
 struct mxsfb_info {
-	struct fb_info fb_info;
 	struct platform_device *pdev;
 	struct clk *clk;
 	struct clk *clk_axi;
@@ -208,8 +207,6 @@ static const struct mxsfb_devdata mxsfb_devdata[] = {
 	},
 };
 
-#define to_imxfb_host(x) (container_of(x, struct mxsfb_info, fb_info))
-
 /* mask and shift depends on architecture */
 static inline u32 set_hsync_pulse_width(struct mxsfb_info *host, unsigned val)
 {
@@ -269,7 +266,7 @@ static inline unsigned chan_to_field(unsigned chan, struct fb_bitfield *bf)
 static int mxsfb_check_var(struct fb_var_screeninfo *var,
 		struct fb_info *fb_info)
 {
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 	const struct fb_bitfield *rgb = NULL;
 
 	if (var->xres < MIN_XRES)
@@ -330,7 +327,7 @@ static inline void mxsfb_disable_axi_clk(struct mxsfb_info *host)
 
 static void mxsfb_enable_controller(struct fb_info *fb_info)
 {
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 	u32 reg;
 	int ret;
 
@@ -367,7 +364,7 @@ static void mxsfb_enable_controller(struct fb_info *fb_info)
 
 static void mxsfb_disable_controller(struct fb_info *fb_info)
 {
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 	unsigned loop;
 	u32 reg;
 	int ret;
@@ -409,7 +406,7 @@ static void mxsfb_disable_controller(struct fb_info *fb_info)
 
 static int mxsfb_set_par(struct fb_info *fb_info)
 {
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 	u32 ctrl, vdctrl0, vdctrl4;
 	int line_size, fb_size;
 	int reenable = 0;
@@ -569,7 +566,7 @@ static int mxsfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 
 static int mxsfb_blank(int blank, struct fb_info *fb_info)
 {
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 
 	switch (blank) {
 	case FB_BLANK_POWERDOWN:
@@ -591,7 +588,7 @@ static int mxsfb_blank(int blank, struct fb_info *fb_info)
 static int mxsfb_pan_display(struct fb_var_screeninfo *var,
 		struct fb_info *fb_info)
 {
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 	unsigned offset;
 
 	if (var->xoffset != 0)
@@ -622,10 +619,10 @@ static struct fb_ops mxsfb_ops = {
 	.fb_imageblit = cfb_imageblit,
 };
 
-static int mxsfb_restore_mode(struct mxsfb_info *host,
+static int mxsfb_restore_mode(struct fb_info *fb_info,
 			struct fb_videomode *vmode)
 {
-	struct fb_info *fb_info = &host->fb_info;
+	struct mxsfb_info *host = fb_info->par;
 	unsigned line_count;
 	unsigned period;
 	unsigned long pa, fbsize;
@@ -726,10 +723,10 @@ err:
 	return ret;
 }
 
-static int mxsfb_init_fbinfo_dt(struct mxsfb_info *host,
+static int mxsfb_init_fbinfo_dt(struct fb_info *fb_info,
 				struct fb_videomode *vmode)
 {
-	struct fb_info *fb_info = &host->fb_info;
+	struct mxsfb_info *host = fb_info->par;
 	struct fb_var_screeninfo *var = &fb_info->var;
 	struct device *dev = &host->pdev->dev;
 	struct device_node *np = host->pdev->dev.of_node;
@@ -805,12 +802,12 @@ put_display_node:
 	return ret;
 }
 
-static int mxsfb_init_fbinfo(struct mxsfb_info *host,
+static int mxsfb_init_fbinfo(struct fb_info *fb_info,
 			struct fb_videomode *vmode)
 {
 	int ret;
+	struct mxsfb_info *host = fb_info->par;
 	struct device *dev = &host->pdev->dev;
-	struct fb_info *fb_info = &host->fb_info;
 	struct fb_var_screeninfo *var = &fb_info->var;
 	dma_addr_t fb_phys;
 	void *fb_virt;
@@ -824,7 +821,7 @@ static int mxsfb_init_fbinfo(struct mxsfb_info *host,
 	fb_info->fix.visual = FB_VISUAL_TRUECOLOR,
 	fb_info->fix.accel = FB_ACCEL_NONE;
 
-	ret = mxsfb_init_fbinfo_dt(host, vmode);
+	ret = mxsfb_init_fbinfo_dt(fb_info, vmode);
 	if (ret)
 		return ret;
 
@@ -843,16 +840,16 @@ static int mxsfb_init_fbinfo(struct mxsfb_info *host,
 	fb_info->screen_base = fb_virt;
 	fb_info->screen_size = fb_info->fix.smem_len = fb_size;
 
-	if (mxsfb_restore_mode(host, vmode))
+	if (mxsfb_restore_mode(fb_info, vmode))
 		memset(fb_virt, 0, fb_size);
 
 	return 0;
 }
 
-static void mxsfb_free_videomem(struct mxsfb_info *host)
+static void mxsfb_free_videomem(struct fb_info *fb_info)
 {
+	struct mxsfb_info *host = fb_info->par;
 	struct device *dev = &host->pdev->dev;
-	struct fb_info *fb_info = &host->fb_info;
 
 	dma_free_wc(dev, fb_info->screen_size, fb_info->screen_base,
 		    fb_info->fix.smem_start);
@@ -902,7 +899,7 @@ static int mxsfb_probe(struct platform_device *pdev)
 	if (mode == NULL)
 		return -ENOMEM;
 
-	host = to_imxfb_host(fb_info);
+	host = fb_info->par;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	host->base = devm_ioremap_resource(&pdev->dev, res);
@@ -941,7 +938,7 @@ static int mxsfb_probe(struct platform_device *pdev)
 		goto fb_release;
 	}
 
-	ret = mxsfb_init_fbinfo(host, mode);
+	ret = mxsfb_init_fbinfo(fb_info, mode);
 	if (ret != 0)
 		goto fb_release;
 
@@ -982,13 +979,13 @@ fb_release:
 static int mxsfb_remove(struct platform_device *pdev)
 {
 	struct fb_info *fb_info = platform_get_drvdata(pdev);
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 
 	if (host->enabled)
 		mxsfb_disable_controller(fb_info);
 
 	unregister_framebuffer(fb_info);
-	mxsfb_free_videomem(host);
+	mxsfb_free_videomem(fb_info);
 
 	framebuffer_release(fb_info);
 
@@ -998,7 +995,7 @@ static int mxsfb_remove(struct platform_device *pdev)
 static void mxsfb_shutdown(struct platform_device *pdev)
 {
 	struct fb_info *fb_info = platform_get_drvdata(pdev);
-	struct mxsfb_info *host = to_imxfb_host(fb_info);
+	struct mxsfb_info *host = fb_info->par;
 
 	mxsfb_enable_axi_clk(host);