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path: root/drivers/gpu/drm/tiny/simpledrm.c
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Diffstat (limited to 'drivers/gpu/drm/tiny/simpledrm.c')
-rw-r--r--drivers/gpu/drm/tiny/simpledrm.c140
1 files changed, 88 insertions, 52 deletions
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 162eb44dcba8..63881a3754f8 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -3,6 +3,7 @@
#include <linux/clk.h>
#include <linux/of_clk.h>
#include <linux/minmax.h>
+#include <linux/of_address.h>
#include <linux/platform_data/simplefb.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
@@ -184,6 +185,31 @@ simplefb_get_format_of(struct drm_device *dev, struct device_node *of_node)
return simplefb_get_validated_format(dev, format);
}
+static struct resource *
+simplefb_get_memory_of(struct drm_device *dev, struct device_node *of_node)
+{
+ struct device_node *np;
+ struct resource *res;
+ int err;
+
+ np = of_parse_phandle(of_node, "memory-region", 0);
+ if (!np)
+ return NULL;
+
+ res = devm_kzalloc(dev->dev, sizeof(*res), GFP_KERNEL);
+ if (!res)
+ return ERR_PTR(-ENOMEM);
+
+ err = of_address_to_resource(np, 0, res);
+ if (err)
+ return ERR_PTR(err);
+
+ if (of_get_property(of_node, "reg", NULL))
+ drm_warn(dev, "preferring \"memory-region\" over \"reg\" property\n");
+
+ return res;
+}
+
/*
* Simple Framebuffer device
*/
@@ -208,7 +234,7 @@ struct simpledrm_device {
unsigned int pitch;
/* memory management */
- void __iomem *screen_base;
+ struct iosys_map screen_base;
/* modesetting */
uint32_t formats[8];
@@ -446,25 +472,6 @@ static int simpledrm_device_init_regulators(struct simpledrm_device *sdev)
* Modesetting
*/
-/*
- * Support all formats of simplefb and maybe more; in order
- * of preference. The display's update function will do any
- * conversion necessary.
- *
- * TODO: Add blit helpers for remaining formats and uncomment
- * constants.
- */
-static const uint32_t simpledrm_primary_plane_formats[] = {
- DRM_FORMAT_XRGB8888,
- DRM_FORMAT_ARGB8888,
- DRM_FORMAT_RGB565,
- //DRM_FORMAT_XRGB1555,
- //DRM_FORMAT_ARGB1555,
- DRM_FORMAT_RGB888,
- DRM_FORMAT_XRGB2101010,
- DRM_FORMAT_ARGB2101010,
-};
-
static const uint64_t simpledrm_primary_plane_format_modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID
@@ -492,15 +499,15 @@ static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane
drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
drm_atomic_for_each_plane_damage(&iter, &damage) {
- struct iosys_map dst = IOSYS_MAP_INIT_VADDR(sdev->screen_base);
struct drm_rect dst_clip = plane_state->dst;
+ struct iosys_map dst = sdev->screen_base;
if (!drm_rect_intersect(&dst_clip, &damage))
continue;
iosys_map_incr(&dst, drm_fb_clip_offset(sdev->pitch, sdev->format, &dst_clip));
- drm_fb_blit(&dst, &sdev->pitch, sdev->format->format, shadow_plane_state->data, fb,
- &damage);
+ drm_fb_blit(&dst, &sdev->pitch, sdev->format->format, shadow_plane_state->data,
+ fb, &damage);
}
drm_dev_exit(idx);
@@ -519,7 +526,7 @@ static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plan
return;
/* Clear screen to black if disabled */
- memset_io(sdev->screen_base, 0, sdev->pitch * sdev->mode.vdisplay);
+ iosys_map_memset(&sdev->screen_base, 0, 0, sdev->pitch * sdev->mode.vdisplay);
drm_dev_exit(idx);
}
@@ -623,8 +630,7 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
struct drm_device *dev;
int width, height, stride;
const struct drm_format_info *format;
- struct resource *res, *mem;
- void __iomem *screen_base;
+ struct resource *res, *mem = NULL;
struct drm_plane *primary_plane;
struct drm_crtc *crtc;
struct drm_encoder *encoder;
@@ -676,6 +682,9 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
format = simplefb_get_format_of(dev, of_node);
if (IS_ERR(format))
return ERR_CAST(format);
+ mem = simplefb_get_memory_of(dev, of_node);
+ if (IS_ERR(mem))
+ return ERR_CAST(mem);
} else {
drm_err(dev, "no simplefb configuration found\n");
return ERR_PTR(-ENODEV);
@@ -698,31 +707,55 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
* Memory management
*/
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return ERR_PTR(-EINVAL);
+ if (mem) {
+ void *screen_base;
- ret = devm_aperture_acquire_from_firmware(dev, res->start, resource_size(res));
- if (ret) {
- drm_err(dev, "could not acquire memory range %pr: error %d\n", res, ret);
- return ERR_PTR(ret);
- }
+ ret = devm_aperture_acquire_from_firmware(dev, mem->start, resource_size(mem));
+ if (ret) {
+ drm_err(dev, "could not acquire memory range %pr: %d\n", mem, ret);
+ return ERR_PTR(ret);
+ }
- mem = devm_request_mem_region(&pdev->dev, res->start, resource_size(res), drv->name);
- if (!mem) {
- /*
- * We cannot make this fatal. Sometimes this comes from magic
- * spaces our resource handlers simply don't know about. Use
- * the I/O-memory resource as-is and try to map that instead.
- */
- drm_warn(dev, "could not acquire memory region %pr\n", res);
- mem = res;
- }
+ drm_dbg(dev, "using system memory framebuffer at %pr\n", mem);
- screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem));
- if (!screen_base)
- return ERR_PTR(-ENOMEM);
- sdev->screen_base = screen_base;
+ screen_base = devm_memremap(dev->dev, mem->start, resource_size(mem), MEMREMAP_WC);
+ if (IS_ERR(screen_base))
+ return screen_base;
+
+ iosys_map_set_vaddr(&sdev->screen_base, screen_base);
+ } else {
+ void __iomem *screen_base;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return ERR_PTR(-EINVAL);
+
+ ret = devm_aperture_acquire_from_firmware(dev, res->start, resource_size(res));
+ if (ret) {
+ drm_err(dev, "could not acquire memory range %pr: %d\n", &res, ret);
+ return ERR_PTR(ret);
+ }
+
+ drm_dbg(dev, "using I/O memory framebuffer at %pr\n", res);
+
+ mem = devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
+ drv->name);
+ if (!mem) {
+ /*
+ * We cannot make this fatal. Sometimes this comes from magic
+ * spaces our resource handlers simply don't know about. Use
+ * the I/O-memory resource as-is and try to map that instead.
+ */
+ drm_warn(dev, "could not acquire memory region %pr\n", res);
+ mem = res;
+ }
+
+ screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem));
+ if (!screen_base)
+ return ERR_PTR(-ENOMEM);
+
+ iosys_map_set_vaddr_iomem(&sdev->screen_base, screen_base);
+ }
/*
* Modesetting
@@ -739,14 +772,12 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
dev->mode_config.max_width = max_width;
dev->mode_config.min_height = height;
dev->mode_config.max_height = max_height;
- dev->mode_config.preferred_depth = format->cpp[0] * 8;
+ dev->mode_config.preferred_depth = format->depth;
dev->mode_config.funcs = &simpledrm_mode_config_funcs;
/* Primary plane */
nformats = drm_fb_build_fourcc_list(dev, &format->format, 1,
- simpledrm_primary_plane_formats,
- ARRAY_SIZE(simpledrm_primary_plane_formats),
sdev->formats, ARRAY_SIZE(sdev->formats));
primary_plane = &sdev->primary_plane;
@@ -823,6 +854,7 @@ static int simpledrm_probe(struct platform_device *pdev)
{
struct simpledrm_device *sdev;
struct drm_device *dev;
+ unsigned int color_mode;
int ret;
sdev = simpledrm_device_create(&simpledrm_driver, pdev);
@@ -834,7 +866,11 @@ static int simpledrm_probe(struct platform_device *pdev)
if (ret)
return ret;
- drm_fbdev_generic_setup(dev, 0);
+ color_mode = drm_format_info_bpp(sdev->format, 0);
+ if (color_mode == 16)
+ color_mode = sdev->format->depth; // can be 15 or 16
+
+ drm_fbdev_generic_setup(dev, color_mode);
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-26 07:45:48 +0300