Arm China Linlon-D6 is register-compatible with the Mali-D71 display
pipeline for the purpose of basic modesetting.
On Linlon-D6, the PRODUCT_ID register is located at the same offset as on
Mali-D71 and reports 0x0060. The IP also exposes the same Komeda top-level
block layout expected by the existing d71_identify() probing flow, so we
can reuse the D71 function table to bring up the display engine.
Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Cunyuan Liu <cunyuan.liu@cixtech.com>
---
drivers/gpu/drm/arm/display/include/malidp_product.h | 1 +
drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c | 1 +
drivers/gpu/drm/arm/display/komeda/komeda_drv.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/arm/display/include/malidp_product.h b/drivers/gpu/drm/arm/display/include/malidp_product.h
index 16a8a2c22c42..6f954bcdf40e 100644
--- a/drivers/gpu/drm/arm/display/include/malidp_product.h
+++ b/drivers/gpu/drm/arm/display/include/malidp_product.h
@@ -20,6 +20,7 @@
/* Mali-display product IDs */
#define MALIDP_D71_PRODUCT_ID 0x0071
#define MALIDP_D32_PRODUCT_ID 0x0032
+#define LINLONDP_D6_PRODUCT_ID 0x0060
union komeda_config_id {
struct {
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 80973975bfdb..f105e3a2dce2 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_dev.c
@@ -628,6 +628,7 @@ d71_identify(u32 __iomem *reg_base, struct komeda_chip_info *chip)
switch (product_id) {
case MALIDP_D71_PRODUCT_ID:
case MALIDP_D32_PRODUCT_ID:
+ case LINLONDP_D6_PRODUCT_ID:
funcs = &d71_chip_funcs;
break;
default:
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
index 358c1512b087..4bb5f250e95e 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
@@ -104,6 +104,7 @@ static int komeda_platform_probe(struct platform_device *pdev)
static const struct of_device_id komeda_of_match[] = {
{ .compatible = "arm,mali-d71", .data = d71_identify, },
{ .compatible = "arm,mali-d32", .data = d71_identify, },
+ { .compatible = "armchina,linlon-d6", .data = d71_identify, },
{},
};
--
2.53.0