drm: omapdrm: dss: Pass DSS pointer to dss_get_*_clk_source()

This removes the need to access the global DSS private data in those
functions (both for the current accesses and the future ones that will
be introduced when allocating the DSS device dynamically).

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

drivers/gpu/drm/omapdrm/dss/dispc.c

@@ -165,6 +165,7 @@ struct dispc_features {
 static struct {
 	struct platform_device *pdev;
 	void __iomem    *base;
+	struct dss_device *dss;
 
 	int irq;
 	irq_handler_t user_handler;
@@ -3112,7 +3113,7 @@ static unsigned long dispc_fclk_rate(void)
 	unsigned long r;
 	enum dss_clk_source src;
 
-	src = dss_get_dispc_clk_source();
+	src = dss_get_dispc_clk_source(dispc.dss);
 
 	if (src == DSS_CLK_SRC_FCK) {
 		r = dss_get_dispc_clk_rate();
@@ -3139,7 +3140,7 @@ static unsigned long dispc_mgr_lclk_rate(enum omap_channel channel)
 	if (!dss_mgr_is_lcd(channel))
 		return dispc_fclk_rate();
 
-	src = dss_get_lcd_clk_source(channel);
+	src = dss_get_lcd_clk_source(dispc.dss, channel);
 
 	if (src == DSS_CLK_SRC_FCK) {
 		r = dss_get_dispc_clk_rate();
@@ -3219,7 +3220,7 @@ static void dispc_dump_clocks_channel(struct seq_file *s, enum omap_channel chan
 
 	seq_printf(s, "- %s -\n", mgr_desc[channel].name);
 
-	lcd_clk_src = dss_get_lcd_clk_source(channel);
+	lcd_clk_src = dss_get_lcd_clk_source(dispc.dss, channel);
 
 	seq_printf(s, "%s clk source = %s\n", mgr_desc[channel].name,
 		dss_get_clk_source_name(lcd_clk_src));
@@ -3236,7 +3237,7 @@ void dispc_dump_clocks(struct seq_file *s)
 {
 	int lcd;
 	u32 l;
-	enum dss_clk_source dispc_clk_src = dss_get_dispc_clk_source();
+	enum dss_clk_source dispc_clk_src = dss_get_dispc_clk_source(dispc.dss);
 
 	if (dispc_runtime_get())
 		return;
@@ -4549,12 +4550,14 @@ static int dispc_bind(struct device *dev, struct device *master, void *data)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	const struct soc_device_attribute *soc;
+	struct dss_device *dss = dss_get_device(master);
 	u32 rev;
 	int r = 0;
 	struct resource *dispc_mem;
 	struct device_node *np = pdev->dev.of_node;
 
 	dispc.pdev = pdev;
+	dispc.dss = dss;
 
 	spin_lock_init(&dispc.control_lock);
 

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -1286,8 +1286,10 @@ static unsigned long dsi_fclk_rate(struct platform_device *dsidev)
 {
 	unsigned long r;
 	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);
+	enum dss_clk_source source;
 
-	if (dss_get_dsi_clk_source(dsi->module_id) == DSS_CLK_SRC_FCK) {
+	source = dss_get_dsi_clk_source(dsi->dss, dsi->module_id);
+	if (source == DSS_CLK_SRC_FCK) {
 		/* DSI FCLK source is DSS_CLK_FCK */
 		r = clk_get_rate(dsi->dss_clk);
 	} else {
@@ -1506,8 +1508,8 @@ static void dsi_dump_dsidev_clocks(struct platform_device *dsidev,
 	int dsi_module = dsi->module_id;
 	struct dss_pll *pll = &dsi->pll;
 
-	dispc_clk_src = dss_get_dispc_clk_source();
-	dsi_clk_src = dss_get_dsi_clk_source(dsi_module);
+	dispc_clk_src = dss_get_dispc_clk_source(dsi->dss);
+	dsi_clk_src = dss_get_dsi_clk_source(dsi->dss, dsi_module);
 
 	if (dsi_runtime_get(dsidev))
 		return;

drivers/gpu/drm/omapdrm/dss/dss.c

@@ -570,25 +570,27 @@ void dss_select_lcd_clk_source(struct dss_device *dss,
 	dss->lcd_clk_source[idx] = clk_src;
 }
 
-enum dss_clk_source dss_get_dispc_clk_source(void)
+enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss)
 {
-	return dss.dispc_clk_source;
+	return dss->dispc_clk_source;
 }
 
-enum dss_clk_source dss_get_dsi_clk_source(int dsi_module)
+enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
+					   int dsi_module)
 {
-	return dss.dsi_clk_source[dsi_module];
+	return dss->dsi_clk_source[dsi_module];
 }
 
-enum dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
+enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
+					   enum omap_channel channel)
 {
-	if (dss.feat->has_lcd_clk_src) {
+	if (dss->feat->has_lcd_clk_src) {
 		int idx = dss_get_channel_index(channel);
-		return dss.lcd_clk_source[idx];
+		return dss->lcd_clk_source[idx];
 	} else {
 		/* LCD_CLK source is the same as DISPC_FCLK source for
 		 * OMAP2 and OMAP3 */
-		return dss.dispc_clk_source;
+		return dss->dispc_clk_source;
 	}
 }
 

drivers/gpu/drm/omapdrm/dss/dss.h

@@ -323,9 +323,11 @@ void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module,
 void dss_select_lcd_clk_source(struct dss_device *dss,
 			       enum omap_channel channel,
 			       enum dss_clk_source clk_src);
-enum dss_clk_source dss_get_dispc_clk_source(void);
-enum dss_clk_source dss_get_dsi_clk_source(int dsi_module);
-enum dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel);
+enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss);
+enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss,
+					   int dsi_module);
+enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss,
+					   enum omap_channel channel);
 
 void dss_set_venc_output(enum omap_dss_venc_type type);
 void dss_set_dac_pwrdn_bgz(bool enable);