We register the simplekms device with the DRM platform helpers. A native driver for the graphics hardware will kick-out the simpledrm driver before taking over the device.
The original generic platform device from the simple-framebuffer boot code will be unregistered. The native driver will use whatever native hardware device it received.
v4: * convert to drm_aperture_acquire_from_firmware() v3: * use platform_device_unregister() and handle detachment like hot-unplug event (Daniel) v2: * adapt to aperture changes * use drm_dev_unplug() and drm_dev_enter/exit() * don't split error string
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Acked-by: Maxime Ripard maxime@cerno.tech Tested-by: nerdopolis bluescreen_avenger@verizon.net --- drivers/gpu/drm/tiny/simpledrm.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 9d522473cd7c..2bdb477d9326 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -6,6 +6,7 @@ #include <linux/platform_device.h> #include <linux/regulator/consumer.h>
+#include <drm/drm_aperture.h> #include <drm/drm_atomic_state_helper.h> #include <drm/drm_connector.h> #include <drm/drm_damage_helper.h> @@ -517,14 +518,23 @@ static int simpledrm_device_init_fb(struct simpledrm_device *sdev)
static int simpledrm_device_init_mm(struct simpledrm_device *sdev) { + struct drm_device *dev = &sdev->dev; struct platform_device *pdev = sdev->pdev; struct resource *mem; void __iomem *screen_base; + int ret;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) return -EINVAL;
+ ret = devm_aperture_acquire_from_firmware(dev, mem->start, resource_size(mem)); + if (ret) { + drm_err(dev, "could not acquire memory range [0x%llx:0x%llx]: error %d\n", + mem->start, mem->end, ret); + return ret; + } + screen_base = devm_ioremap_wc(&pdev->dev, mem->start, resource_size(mem)); if (!screen_base) @@ -625,12 +635,18 @@ simpledrm_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); struct drm_framebuffer *fb = plane_state->fb; void *vmap = shadow_plane_state->map[0].vaddr; /* TODO: Use mapping abstraction properly */ + struct drm_device *dev = &sdev->dev; + int idx;
if (!fb) return;
+ if (!drm_dev_enter(dev, &idx)) + return; + drm_fb_blit_dstclip(sdev->screen_base, sdev->pitch, sdev->format->format, vmap, fb); + drm_dev_exit(idx); }
static void @@ -658,7 +674,9 @@ simpledrm_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state); void *vmap = shadow_plane_state->map[0].vaddr; /* TODO: Use mapping abstraction properly */ struct drm_framebuffer *fb = plane_state->fb; + struct drm_device *dev = &sdev->dev; struct drm_rect clip; + int idx;
if (!fb) return; @@ -666,8 +684,13 @@ simpledrm_simple_display_pipe_update(struct drm_simple_display_pipe *pipe, if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &clip)) return;
+ if (!drm_dev_enter(dev, &idx)) + return; + drm_fb_blit_rect_dstclip(sdev->screen_base, sdev->pitch, sdev->format->format, vmap, fb, &clip); + + drm_dev_exit(idx); }
static const struct drm_simple_display_pipe_funcs @@ -847,7 +870,7 @@ static int simpledrm_remove(struct platform_device *pdev) struct simpledrm_device *sdev = platform_get_drvdata(pdev); struct drm_device *dev = &sdev->dev;
- drm_dev_unregister(dev); + drm_dev_unplug(dev);
return 0; }