drivers/gpu/drm/gma500/framebuffer.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/gma500/framebuffer.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/gma500/framebuffer.c
Extension
.c
Size
3603 bytes
Lines
137
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (gma_encoder->type) {
		case INTEL_OUTPUT_ANALOG:
			crtc_mask = (1 << 0);
			clone_mask = (1 << INTEL_OUTPUT_ANALOG);
			break;
		case INTEL_OUTPUT_SDVO:
			crtc_mask = dev_priv->ops->sdvo_mask;
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_LVDS:
			crtc_mask = dev_priv->ops->lvds_mask;
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_MIPI:
			crtc_mask = (1 << 0);
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_MIPI2:
			crtc_mask = (1 << 2);
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_HDMI:
			crtc_mask = dev_priv->ops->hdmi_mask;
			clone_mask = (1 << INTEL_OUTPUT_HDMI);
			break;
		case INTEL_OUTPUT_DISPLAYPORT:
			crtc_mask = (1 << 0) | (1 << 1);
			clone_mask = 0;
			break;
		case INTEL_OUTPUT_EDP:
			crtc_mask = (1 << 1);
			clone_mask = 0;
		}
		encoder->possible_crtcs = crtc_mask;
		encoder->possible_clones =
		    gma_connector_clones(dev, clone_mask);
	}
	drm_connector_list_iter_end(&conn_iter);
}

void psb_modeset_init(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
	int i;

	if (drmm_mode_config_init(dev))
		return;

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	dev->mode_config.funcs = &psb_mode_funcs;

	/* num pipes is 2 for PSB but 1 for Mrst */
	for (i = 0; i < dev_priv->num_pipe; i++)
		psb_intel_crtc_init(dev, i, mode_dev);

	dev->mode_config.max_width = 4096;
	dev->mode_config.max_height = 4096;

	psb_setup_outputs(dev);

	if (dev_priv->ops->errata)
	        dev_priv->ops->errata(dev);

        dev_priv->modeset = true;
}

void psb_modeset_cleanup(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
	if (dev_priv->modeset) {
		drm_kms_helper_poll_fini(dev);
	}
}

Annotation

Implementation Notes