Get clock info from DT and enable it during initialization.
Also changed name of the driver to "kmb,display" to match other
entries in the DT.
v2: fixed error in clk_disable
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@xxxxxxxxx>
Reviewed-by: Bob Paauwe <bob.j.paauwe@xxxxxxxxx>
---
drivers/gpu/drm/kmb/kmb_drv.c | 41 +++++++++++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c
index 5a2ff9d..71fdb94 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.c
+++ b/drivers/gpu/drm/kmb/kmb_drv.c
@@ -32,6 +32,25 @@
/*IRQ handler*/
static irqreturn_t kmb_isr(int irq, void *arg);
+static struct clk *clk_lcd;
+static struct clk *clk_mipi;
+
+static int kmb_display_clk_enable(void)
+{
+ clk_prepare_enable(clk_lcd);
+ clk_prepare_enable(clk_mipi);
+ return 0;
+}
+
+static int kmb_display_clk_disable(void)
+{
+ if (clk_lcd)
+ clk_disable_unprepare(clk_lcd);
+ if (clk_mipi)
+ clk_disable_unprepare(clk_mipi);
+ return 0;
+}
+
static int kmb_load(struct drm_device *drm, unsigned long flags)
{
struct kmb_drm_private *dev_p = to_kmb(drm);
@@ -153,6 +172,19 @@ static int kmb_load(struct drm_device *drm, unsigned long flags)
goto setup_fail;
}
+ /* enable display clocks*/
+ clk_lcd = clk_get(&pdev->dev, "clk_lcd");
+ if (!clk_lcd) {
+ DRM_ERROR("clk_get() failed clk_lcd\n");
+ goto setup_fail;
+ }
+ clk_mipi = clk_get(&pdev->dev, "clk_mipi");
+ if (!clk_mipi) {
+ DRM_ERROR("clk_get() failed clk_mipi\n");
+ goto setup_fail;
+ }
+ kmb_display_clk_enable();
+
ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
if (ret < 0) {
DRM_ERROR("failed to install IRQ handler\n");
@@ -382,6 +414,11 @@ static void kmb_drm_unbind(struct device *dev)
of_reserved_mem_device_release(drm->dev);
drm_mode_config_cleanup(drm);
+ /*release clks */
+ kmb_display_clk_disable();
+ clk_put(clk_lcd);
+ clk_put(clk_mipi);
+
drm_dev_put(drm);
drm->dev_private = NULL;
dev_set_drvdata(dev, NULL);
@@ -420,8 +457,8 @@ static int kmb_remove(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id kmb_of_match[] = {
- {.compatible = "lcd"},
+static const struct of_device_id kmb_of_match[] = {
+ {.compatible = "kmb,display"},
{},
};
--
2.7.4
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