Add support for 'depth' property to configure default frame
buffer color depth over device tree.
Signed-off-by: Anatolij Gustschin <agust@xxxxxxx>
---
.../devicetree/bindings/powerpc/fsl/diu.txt | 2 ++
drivers/video/fsl-diu-fb.c | 16 ++++++++++++++++
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/Documentation/devicetree/bindings/powerpc/fsl/diu.txt b/Documentation/devicetree/bindings/powerpc/fsl/diu.txt
index b66cb6d..502aae5 100644
--- a/Documentation/devicetree/bindings/powerpc/fsl/diu.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/diu.txt
@@ -12,6 +12,7 @@ Required properties:
services interrupts for this device.
Optional properties:
+- depth : default frame buffer color depth
- edid : verbatim EDID data block describing attached display.
Data from the detailed timing descriptor will be used to
program the display controller.
@@ -30,5 +31,6 @@ Example for MPC5121:
reg = <0x2100 0x100>;
interrupts = <64 0x8>;
interrupt-parent = <&ipic>;
+ depth = <16>;
edid = [edid-data];
};
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index 41fbd94..2287817 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -1534,6 +1534,7 @@ static int fsl_diu_probe(struct platform_device *pdev)
const void *prop;
unsigned int i;
int ret;
+ u32 depth;
data = dmam_alloc_coherent(&pdev->dev, sizeof(struct fsl_diu_data),
&dma_addr, GFP_DMA | __GFP_ZERO);
@@ -1584,6 +1585,21 @@ static int fsl_diu_probe(struct platform_device *pdev)
data->has_edid = true;
}
+ if (!of_property_read_u32(np, "depth", &depth)) {
+ switch (depth) {
+ case 32:
+ case 24:
+ case 16:
+ case 8:
+ default_bpp = depth;
+ break;
+ default:
+ dev_err(&pdev->dev,
+ "%s: invalid depth property\n",
+ np->full_name);
+ }
+ }
+
data->diu_reg = of_iomap(np, 0);
if (!data->diu_reg) {
dev_err(&pdev->dev, "cannot map DIU registers\n");
--
1.7.5.4
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