From: Seung-Woo Kim <sw0312....@samsung.com>
This patch adds device tree support for exynos_drm_gsc. This patch
also fixed build issue on non-Exynos platforms, thus dependency on
!ARCH_MULTIPLATFORM can be now removed. The driver cannot be used
simultaneously with V4L2 Mem2Mem GScaller driver thought.
Signed-off-by: Seung-Woo Kim <sw0312....@samsung.com>
[updated commit message, removed the need for wb-lcd property, because
all gscallers have support for lcd writeback, replaced dependency on
!ARCH_MULTIPLATFORM with !VIDEO_SAMSUNG_EXYNOS_GSC]
Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
---
.../devicetree/bindings/media/exynos5-gsc.txt | 4 +++
drivers/gpu/drm/exynos/Kconfig | 2 +-
drivers/gpu/drm/exynos/exynos_drm_gsc.c | 30 +++++++++++++++++++---
drivers/gpu/drm/exynos/regs-gsc.h | 4 +--
4 files changed, 33 insertions(+), 7 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/exynos5-gsc.txt
b/Documentation/devicetree/bindings/media/exynos5-gsc.txt
index 0604d42f38d1..5fe9372abb37 100644
--- a/Documentation/devicetree/bindings/media/exynos5-gsc.txt
+++ b/Documentation/devicetree/bindings/media/exynos5-gsc.txt
@@ -7,6 +7,10 @@ Required properties:
- reg: should contain G-Scaler physical address location and length.
- interrupts: should contain G-Scaler interrupt number
+Optional properties:
+- samsung,sysreg: handle to syscon used to control the system registers to
+ set writeback input and destination
+
Example:
gsc_0: gsc@0x13e00000 {
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 96e86cf4455b..83efca941388 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -118,7 +118,7 @@ config DRM_EXYNOS_ROTATOR
config DRM_EXYNOS_GSC
bool "GScaler"
- depends on DRM_EXYNOS_IPP && ARCH_EXYNOS5 && !ARCH_MULTIPLATFORM
+ depends on DRM_EXYNOS_IPP && ARCH_EXYNOS5 && !VIDEO_SAMSUNG_EXYNOS_GSC
help
Choose this option if you want to use Exynos GSC for DRM.
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
index ed55d37b6330..7aecd23cfa11 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
@@ -15,7 +15,8 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
-#include <plat/map-base.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
#include <drm/drmP.h>
#include <drm/exynos_drm.h>
@@ -126,6 +127,7 @@ struct gsc_capability {
* @ippdrv: prepare initialization using ippdrv.
* @regs_res: register resources.
* @regs: memory mapped io registers.
+ * @sysreg: handle to SYSREG block regmap.
* @lock: locking of operations.
* @gsc_clk: gsc gate clock.
* @sc: scaler infomations.
@@ -138,6 +140,7 @@ struct gsc_context {
struct exynos_drm_ippdrv ippdrv;
struct resource *regs_res;
void __iomem *regs;
+ struct regmap *sysreg;
struct mutex lock;
struct clk *gsc_clk;
struct gsc_scaler sc;
@@ -437,9 +440,12 @@ static int gsc_sw_reset(struct gsc_context *ctx)
static void gsc_set_gscblk_fimd_wb(struct gsc_context *ctx, bool enable)
{
- u32 gscblk_cfg;
+ unsigned int gscblk_cfg;
- gscblk_cfg = readl(SYSREG_GSCBLK_CFG1);
+ if (!ctx->sysreg)
+ return;
+
+ regmap_read(ctx->sysreg, SYSREG_GSCBLK_CFG1, &gscblk_cfg);
if (enable)
gscblk_cfg |= GSC_BLK_DISP1WB_DEST(ctx->id) |
@@ -448,7 +454,7 @@ static void gsc_set_gscblk_fimd_wb(struct gsc_context *ctx,
bool enable)
else
gscblk_cfg |= GSC_BLK_PXLASYNC_LO_MASK_WB(ctx->id);
- writel(gscblk_cfg, SYSREG_GSCBLK_CFG1);
+ regmap_write(ctx->sysreg, SYSREG_GSCBLK_CFG1, gscblk_cfg);
}
static void gsc_handle_irq(struct gsc_context *ctx, bool enable,
@@ -1663,6 +1669,15 @@ static int gsc_probe(struct platform_device *pdev)
if (!ctx)
return -ENOMEM;
+ if (dev->of_node) {
+ ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,sysreg");
+ if (IS_ERR(ctx->sysreg)) {
+ dev_warn(dev, "failed to get system register.\n");
+ ctx->sysreg = NULL;
+ }
+ }
+
/* clock control */
ctx->gsc_clk = devm_clk_get(dev, "gscl");
if (IS_ERR(ctx->gsc_clk)) {
@@ -1796,6 +1811,12 @@ static const struct dev_pm_ops gsc_pm_ops = {
SET_RUNTIME_PM_OPS(gsc_runtime_suspend, gsc_runtime_resume, NULL)
};
+static const struct of_device_id exynos_drm_gsc_of_match[] = {
+ { .compatible = "samsung,exynos5-gsc" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, exynos_drm_gsc_of_match);
+
struct platform_driver gsc_driver = {
.probe = gsc_probe,
.remove = gsc_remove,
@@ -1803,6 +1824,7 @@ struct platform_driver gsc_driver = {
.name = "exynos-drm-gsc",
.owner = THIS_MODULE,
.pm = &gsc_pm_ops,
+ .of_match_table = of_match_ptr(exynos_drm_gsc_of_match),
},
};
diff --git a/drivers/gpu/drm/exynos/regs-gsc.h
b/drivers/gpu/drm/exynos/regs-gsc.h
index 9ad592707aaf..4704a993cbb7 100644
--- a/drivers/gpu/drm/exynos/regs-gsc.h
+++ b/drivers/gpu/drm/exynos/regs-gsc.h
@@ -273,12 +273,12 @@
#define GSC_CLK_GATE_MODE_SNOOP_CNT(x) ((x) << 0)
/* SYSCON. GSCBLK_CFG */
-#define SYSREG_GSCBLK_CFG1 (S3C_VA_SYS + 0x0224)
+#define SYSREG_GSCBLK_CFG1 0x0224
#define GSC_BLK_DISP1WB_DEST(x) (x << 10)
#define GSC_BLK_SW_RESET_WB_DEST(x) (1 << (18 + x))
#define GSC_BLK_PXLASYNC_LO_MASK_WB(x) (0 << (14 + x))
#define GSC_BLK_GSCL_WB_IN_SRC_SEL(x) (1 << (2 * x))
-#define SYSREG_GSCBLK_CFG2 (S3C_VA_SYS + 0x2000)
+#define SYSREG_GSCBLK_CFG2 0x2000
#define PXLASYNC_LO_MASK_CAMIF_GSCL(x) (1 << (x))
#endif /* EXYNOS_REGS_GSC_H_ */
--
1.9.2
--
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