diff mbox series

[v8,2/8] drm/etnaviv: add a dedicated function to get various clocks

Message ID 20230607105551.568639-3-15330273260@189.cn (mailing list archive)
State New, archived
Headers show
Series drm/etnaviv: add pci device driver support | expand

Commit Message

Sui Jingfeng June 7, 2023, 10:55 a.m. UTC 
From: Sui Jingfeng <suijingfeng@loongson.cn>

Because it is also platform-dependent, there are environments where don't
have CLK subsystem support, for example, discreted PCI GPUs. So don't rage
quit if there is no CLK subsystem support.

For the GPU in LS7A1000 and LS2K1000, the working frequency of the GPU is
tuned by configuring the PLL registers.

Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 53 ++++++++++++++++-----------
 1 file changed, 32 insertions(+), 21 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index b9c12d3145a2..d4f99cb0456f 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1565,6 +1565,35 @@  static irqreturn_t irq_handler(int irq, void *data)
 	return ret;
 }
 
+static int etnaviv_gpu_clk_get(struct etnaviv_gpu *gpu)
+{
+	struct device *dev = gpu->dev;
+
+	gpu->clk_reg = devm_clk_get_optional(dev, "reg");
+	DBG("clk_reg: %p", gpu->clk_reg);
+	if (IS_ERR(gpu->clk_reg))
+		return PTR_ERR(gpu->clk_reg);
+
+	gpu->clk_bus = devm_clk_get_optional(dev, "bus");
+	DBG("clk_bus: %p", gpu->clk_bus);
+	if (IS_ERR(gpu->clk_bus))
+		return PTR_ERR(gpu->clk_bus);
+
+	gpu->clk_core = devm_clk_get(dev, "core");
+	DBG("clk_core: %p", gpu->clk_core);
+	if (IS_ERR(gpu->clk_core))
+		return PTR_ERR(gpu->clk_core);
+	gpu->base_rate_core = clk_get_rate(gpu->clk_core);
+
+	gpu->clk_shader = devm_clk_get_optional(dev, "shader");
+	DBG("clk_shader: %p", gpu->clk_shader);
+	if (IS_ERR(gpu->clk_shader))
+		return PTR_ERR(gpu->clk_shader);
+	gpu->base_rate_shader = clk_get_rate(gpu->clk_shader);
+
+	return 0;
+}
+
 static int etnaviv_gpu_clk_enable(struct etnaviv_gpu *gpu)
 {
 	int ret;
@@ -1865,27 +1894,9 @@  static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 		return err;
 
 	/* Get Clocks: */
-	gpu->clk_reg = devm_clk_get_optional(&pdev->dev, "reg");
-	DBG("clk_reg: %p", gpu->clk_reg);
-	if (IS_ERR(gpu->clk_reg))
-		return PTR_ERR(gpu->clk_reg);
-
-	gpu->clk_bus = devm_clk_get_optional(&pdev->dev, "bus");
-	DBG("clk_bus: %p", gpu->clk_bus);
-	if (IS_ERR(gpu->clk_bus))
-		return PTR_ERR(gpu->clk_bus);
-
-	gpu->clk_core = devm_clk_get(&pdev->dev, "core");
-	DBG("clk_core: %p", gpu->clk_core);
-	if (IS_ERR(gpu->clk_core))
-		return PTR_ERR(gpu->clk_core);
-	gpu->base_rate_core = clk_get_rate(gpu->clk_core);
-
-	gpu->clk_shader = devm_clk_get_optional(&pdev->dev, "shader");
-	DBG("clk_shader: %p", gpu->clk_shader);
-	if (IS_ERR(gpu->clk_shader))
-		return PTR_ERR(gpu->clk_shader);
-	gpu->base_rate_shader = clk_get_rate(gpu->clk_shader);
+	err = etnaviv_gpu_clk_get(gpu);
+	if (err)
+		return err;
 
 	/* TODO: figure out max mapped size */
 	dev_set_drvdata(dev, gpu);