[PATCH 1/2] drm/komeda: Update the chip identify
james qian wang (Arm Technology China)
james.qian.wang at arm.com
Tue Jul 9 07:57:08 UTC 2019
1. Drop komeda-CORE product id comparison and put it into the d71_identify
2. Update pipeline node DT-binding:
*. Skip the needless pipeline DT node.
*. Return fail if the essential pipeline DT node was missing.
With these changes, for one family chips no need to change the DT.
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang at arm.com>
---
.../gpu/drm/arm/display/komeda/d71/d71_dev.c | 27 ++++++--
.../gpu/drm/arm/display/komeda/komeda_dev.c | 62 ++++++++++---------
.../gpu/drm/arm/display/komeda/komeda_dev.h | 14 +----
.../gpu/drm/arm/display/komeda/komeda_drv.c | 9 +--
4 files changed, 60 insertions(+), 52 deletions(-)
diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
index 7e7c9e935eaf..e383a781c9e9 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
@@ -578,10 +578,27 @@ static const struct komeda_dev_funcs d71_chip_funcs = {
const struct komeda_dev_funcs *
d71_identify(u32 __iomem *reg_base, struct komeda_chip_info *chip)
{
- chip->arch_id = malidp_read32(reg_base, GLB_ARCH_ID);
- chip->core_id = malidp_read32(reg_base, GLB_CORE_ID);
- chip->core_info = malidp_read32(reg_base, GLB_CORE_INFO);
- chip->bus_width = D71_BUS_WIDTH_16_BYTES;
+ const struct komeda_dev_funcs *funcs;
+ u32 product_id;
- return &d71_chip_funcs;
+ chip->core_id = malidp_read32(reg_base, GLB_CORE_ID);
+
+ product_id = MALIDP_CORE_ID_PRODUCT_ID(chip->core_id);
+
+ switch (product_id) {
+ case MALIDP_D71_PRODUCT_ID:
+ funcs = &d71_chip_funcs;
+ break;
+ default:
+ funcs = NULL;
+ DRM_ERROR("Unsupported product: 0x%x\n", product_id);
+ }
+
+ if (funcs) {
+ chip->arch_id = malidp_read32(reg_base, GLB_ARCH_ID);
+ chip->core_info = malidp_read32(reg_base, GLB_CORE_INFO);
+ chip->bus_width = D71_BUS_WIDTH_16_BYTES;
+ }
+
+ return funcs;
}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
index 2aee735a683f..dd4a0ba1c37d 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -125,23 +125,16 @@ static int to_color_format(const char *str)
return format;
}
-static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
+static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe)
{
- struct komeda_pipeline *pipe;
+ struct device_node *np = pipe->of_node;
struct clk *clk;
- u32 pipe_id;
- int ret = 0, color_format;
+ u32 color_format;
const char *str;
- ret = of_property_read_u32(np, "reg", &pipe_id);
- if (ret != 0 || pipe_id >= mdev->n_pipelines)
- return -EINVAL;
-
- pipe = mdev->pipelines[pipe_id];
-
clk = of_clk_get_by_name(np, "pxclk");
if (IS_ERR(clk)) {
- DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
+ DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id);
return PTR_ERR(clk);
}
pipe->pxlclk = clk;
@@ -163,7 +156,6 @@ static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];
- pipe->of_node = np;
return 0;
}
@@ -172,7 +164,9 @@ static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
{
struct platform_device *pdev = to_platform_device(dev);
struct device_node *child, *np = dev->of_node;
- int ret;
+ struct komeda_pipeline *pipe;
+ u32 pipe_id = U32_MAX;
+ int ret = -1;
mdev->irq = platform_get_irq(pdev, 0);
if (mdev->irq < 0) {
@@ -181,32 +175,46 @@ static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
}
for_each_available_child_of_node(np, child) {
- if (of_node_cmp(child->name, "pipeline") == 0) {
- ret = komeda_parse_pipe_dt(mdev, child);
- if (ret) {
- DRM_ERROR("parse pipeline dt error!\n");
+ if (of_node_name_eq(child, "pipeline")) {
+ ret = of_property_read_u32(child, "reg", &pipe_id);
+ if (pipe_id >= mdev->n_pipelines) {
+ DRM_WARN("Skip the redandunt DT node: pipeline-%u.\n",
+ pipe_id);
of_node_put(child);
- break;
+ continue;
}
+ mdev->pipelines[pipe_id]->of_node = child;
+ }
+ }
+
+ for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) {
+ pipe = mdev->pipelines[pipe_id];
+
+ if (!pipe->of_node) {
+ DRM_ERROR("Omit DT node for pipeline-%d.\n", pipe->id);
+ return -EINVAL;
}
+ ret = komeda_parse_pipe_dt(pipe);
+ if (ret)
+ return ret;
}
mdev->side_by_side = !of_property_read_u32(np, "side_by_side_master",
- &mdev->side_by_side_master);
+ &mdev->side_by_side_master);
- return ret;
+ return 0;
}
struct komeda_dev *komeda_dev_create(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
- const struct komeda_product_data *product;
+ komeda_identify_func komeda_identify;
struct komeda_dev *mdev;
struct resource *io_res;
int err = 0;
- product = of_device_get_match_data(dev);
- if (!product)
+ komeda_identify = of_device_get_match_data(dev);
+ if (!komeda_identify)
return ERR_PTR(-ENODEV);
io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -240,11 +248,9 @@ struct komeda_dev *komeda_dev_create(struct device *dev)
clk_prepare_enable(mdev->aclk);
- mdev->funcs = product->identify(mdev->reg_base, &mdev->chip);
- if (!komeda_product_match(mdev, product->product_id)) {
- DRM_ERROR("DT configured %x mismatch with real HW %x.\n",
- product->product_id,
- MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
+ mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip);
+ if (!mdev->funcs) {
+ DRM_ERROR("Failed to identify the HW.\n");
err = -ENODEV;
goto disable_clk;
}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
index c70cc25d246f..f91a113b0fde 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.h
@@ -51,11 +51,6 @@
#define KOMEDA_WARN_EVENTS KOMEDA_ERR_CSCE
-/* malidp device id */
-enum {
- MALI_D71 = 0,
-};
-
/* pipeline DT ports */
enum {
KOMEDA_OF_PORT_OUTPUT = 0,
@@ -69,12 +64,6 @@ struct komeda_chip_info {
u32 bus_width;
};
-struct komeda_product_data {
- u32 product_id;
- const struct komeda_dev_funcs *(*identify)(u32 __iomem *reg,
- struct komeda_chip_info *info);
-};
-
struct komeda_dev;
struct komeda_events {
@@ -219,6 +208,9 @@ komeda_product_match(struct komeda_dev *mdev, u32 target)
return MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id) == target;
}
+typedef const struct komeda_dev_funcs *
+(*komeda_identify_func)(u32 __iomem *reg, struct komeda_chip_info *chip);
+
const struct komeda_dev_funcs *
d71_identify(u32 __iomem *reg, struct komeda_chip_info *chip);
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
index d6c2222c5d33..b7a1097c45c4 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
@@ -123,15 +123,8 @@ static int komeda_platform_remove(struct platform_device *pdev)
return 0;
}
-static const struct komeda_product_data komeda_products[] = {
- [MALI_D71] = {
- .product_id = MALIDP_D71_PRODUCT_ID,
- .identify = d71_identify,
- },
-};
-
static const struct of_device_id komeda_of_match[] = {
- { .compatible = "arm,mali-d71", .data = &komeda_products[MALI_D71], },
+ { .compatible = "arm,mali-d71", .data = d71_identify, },
{},
};
--
2.20.1
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