drivers/gpu/drm/loongson/lsdc_crtc.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/loongson/lsdc_crtc.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/loongson/lsdc_crtc.c
Extension
.c
Size
27500 bytes
Lines
1027
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct file_operations lsdc_crtc_man_op_fops = {
	.owner = THIS_MODULE,
	.open = lsdc_crtc_man_op_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = lsdc_crtc_man_op_write,
};

static int lsdc_crtc_late_register(struct drm_crtc *crtc)
{
	struct lsdc_display_pipe *dispipe = crtc_to_display_pipe(crtc);
	struct lsdc_crtc *lcrtc = to_lsdc_crtc(crtc);
	struct drm_minor *minor = crtc->dev->primary;
	unsigned int index = dispipe->index;
	unsigned int i;

	lcrtc->preg = lsdc_crtc_regs_array[index];
	lcrtc->nreg = ARRAY_SIZE(lsdc_crtc_regs_array[index]);
	lcrtc->p_info_list = lsdc_crtc_debugfs_list[index];
	lcrtc->n_info_list = ARRAY_SIZE(lsdc_crtc_debugfs_list[index]);

	for (i = 0; i < lcrtc->n_info_list; ++i)
		lcrtc->p_info_list[i].data = lcrtc;

	drm_debugfs_create_files(lcrtc->p_info_list, lcrtc->n_info_list,
				 crtc->debugfs_entry, minor);

	/* Manual operations supported */
	debugfs_create_file("ops", 0644, crtc->debugfs_entry, lcrtc,
			    &lsdc_crtc_man_op_fops);

	return 0;
}

static void lsdc_crtc_atomic_print_state(struct drm_printer *p,
					 const struct drm_crtc_state *state)
{
	const struct lsdc_crtc_state *priv_state;
	const struct lsdc_pixpll_parms *pparms;

	priv_state = container_of_const(state, struct lsdc_crtc_state, base);
	pparms = &priv_state->pparms;

	drm_printf(p, "\tInput clock divider = %u\n", pparms->div_ref);
	drm_printf(p, "\tMedium clock multiplier = %u\n", pparms->loopc);
	drm_printf(p, "\tOutput clock divider = %u\n", pparms->div_out);
}

static const struct drm_crtc_funcs ls7a1000_crtc_funcs = {
	.reset = lsdc_crtc_reset,
	.destroy = drm_crtc_cleanup,
	.set_config = drm_atomic_helper_set_config,
	.page_flip = drm_atomic_helper_page_flip,
	.atomic_duplicate_state = lsdc_crtc_atomic_duplicate_state,
	.atomic_destroy_state = lsdc_crtc_atomic_destroy_state,
	.late_register = lsdc_crtc_late_register,
	.enable_vblank = lsdc_crtc_enable_vblank,
	.disable_vblank = lsdc_crtc_disable_vblank,
	.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
	.atomic_print_state = lsdc_crtc_atomic_print_state,
};

static const struct drm_crtc_funcs ls7a2000_crtc_funcs = {
	.reset = lsdc_crtc_reset,
	.destroy = drm_crtc_cleanup,
	.set_config = drm_atomic_helper_set_config,
	.page_flip = drm_atomic_helper_page_flip,
	.atomic_duplicate_state = lsdc_crtc_atomic_duplicate_state,
	.atomic_destroy_state = lsdc_crtc_atomic_destroy_state,
	.late_register = lsdc_crtc_late_register,
	.get_vblank_counter = lsdc_crtc_get_vblank_counter,
	.enable_vblank = lsdc_crtc_enable_vblank,
	.disable_vblank = lsdc_crtc_disable_vblank,
	.get_vblank_timestamp = drm_crtc_vblank_helper_get_vblank_timestamp,
	.atomic_print_state = lsdc_crtc_atomic_print_state,
};

static enum drm_mode_status
lsdc_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
{
	struct drm_device *ddev = crtc->dev;
	struct lsdc_device *ldev = to_lsdc(ddev);
	const struct lsdc_desc *descp = ldev->descp;
	unsigned int pitch;

	if (mode->hdisplay > descp->max_width)
		return MODE_BAD_HVALUE;

	if (mode->vdisplay > descp->max_height)

Annotation

Implementation Notes