1 /* SPDX-License-Identifier: GPL-2.0 */
3  * Copyright 2012-2019 Red Hat
14  * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets
16  * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
19 #include <linux/iosys-map.h>
24 #include <video/vga.h>
49 #define DRIVER_DESC "qemu cirrus vga"
54 #define CIRRUS_MAX_PITCH (0x1FF << 3)      /* (4096 - 1) & ~111b bytes */
77 	const struct drm_format_info   *format;  member
87 /* ------------------------------------------------------------------ */
102 	iowrite8(reg, cirrus->mmio + SEQ_INDEX);  in rreg_seq()
103 	return ioread8(cirrus->mmio + SEQ_DATA);  in rreg_seq()
108 	iowrite8(reg, cirrus->mmio + SEQ_INDEX);  in wreg_seq()
109 	iowrite8(val, cirrus->mmio + SEQ_DATA);  in wreg_seq()
117 	iowrite8(reg, cirrus->mmio + CRT_INDEX);  in rreg_crt()
118 	return ioread8(cirrus->mmio + CRT_DATA);  in rreg_crt()
123 	iowrite8(reg, cirrus->mmio + CRT_INDEX);  in wreg_crt()
124 	iowrite8(val, cirrus->mmio + CRT_DATA);  in wreg_crt()
132 	iowrite8(reg, cirrus->mmio + GFX_INDEX);  in wreg_gfx()
133 	iowrite8(val, cirrus->mmio + GFX_DATA);  in wreg_gfx()
140 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
141 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
142 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
143 	ioread8(cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
144 	iowrite8(val, cirrus->mmio + VGA_DAC_MASK);  in wreg_hdr()
149 	if (fb->format->format == DRM_FORMAT_XRGB8888 && fb->pitches[0] > CIRRUS_MAX_PITCH) {  in cirrus_convert_to()
150 		if (fb->width * 3 <= CIRRUS_MAX_PITCH)  in cirrus_convert_to()
162 	const struct drm_format_info *format = cirrus_convert_to(fb);  in cirrus_format()  local
164 	if (format)  in cirrus_format()
165 		return format;  in cirrus_format()
166 	return fb->format;  in cirrus_format()
171 	const struct drm_format_info *format = cirrus_convert_to(fb);  in cirrus_pitch()  local
173 	if (format)  in cirrus_pitch()
174 		return drm_format_info_min_pitch(format, 0, fb->width);  in cirrus_pitch()
175 	return fb->pitches[0];  in cirrus_pitch()
206 	htotal = mode->htotal / 8;  in cirrus_mode_set()
207 	hsyncend = mode->hsync_end / 8;  in cirrus_mode_set()
208 	hsyncstart = mode->hsync_start / 8;  in cirrus_mode_set()
209 	hdispend = mode->hdisplay / 8;  in cirrus_mode_set()
211 	vtotal = mode->vtotal;  in cirrus_mode_set()
212 	vdispend = mode->vdisplay;  in cirrus_mode_set()
214 	vdispend -= 1;  in cirrus_mode_set()
215 	vtotal -= 2;  in cirrus_mode_set()
217 	htotal -= 5;  in cirrus_mode_set()
218 	hdispend -= 1;  in cirrus_mode_set()
271 			      const struct drm_format_info *format)  in cirrus_format_set()  argument
278 	switch (format->format) {  in cirrus_format_set()
301 	/* Enable high-colour modes */  in cirrus_format_set()
327 /* ------------------------------------------------------------------ */
347 	struct drm_framebuffer *fb = new_plane_state->fb;  in cirrus_primary_plane_helper_atomic_check()
348 	struct drm_crtc *new_crtc = new_plane_state->crtc;  in cirrus_primary_plane_helper_atomic_check()
362 	else if (!new_plane_state->visible)  in cirrus_primary_plane_helper_atomic_check()
369 		return -EINVAL;  in cirrus_primary_plane_helper_atomic_check()
370 	else if (pitch * fb->height > CIRRUS_VRAM_SIZE)  in cirrus_primary_plane_helper_atomic_check()
371 		return -EINVAL;  in cirrus_primary_plane_helper_atomic_check()
373 	new_primary_plane_state->format = cirrus_format(fb);  in cirrus_primary_plane_helper_atomic_check()
374 	new_primary_plane_state->pitch = pitch;  in cirrus_primary_plane_helper_atomic_check()
382 	struct cirrus_device *cirrus = to_cirrus(plane->dev);  in cirrus_primary_plane_helper_atomic_update()
387 	struct drm_framebuffer *fb = plane_state->fb;  in cirrus_primary_plane_helper_atomic_update()
388 	const struct drm_format_info *format = primary_plane_state->format;  in cirrus_primary_plane_helper_atomic_update()  local
389 	unsigned int pitch = primary_plane_state->pitch;  in cirrus_primary_plane_helper_atomic_update()
393 	struct iosys_map vaddr = IOSYS_MAP_INIT_VADDR_IOMEM(cirrus->vram);  in cirrus_primary_plane_helper_atomic_update()
401 	if (!drm_dev_enter(&cirrus->dev, &idx))  in cirrus_primary_plane_helper_atomic_update()
404 	if (old_primary_plane_state->format != format)  in cirrus_primary_plane_helper_atomic_update()
405 		cirrus_format_set(cirrus, format);  in cirrus_primary_plane_helper_atomic_update()
406 	if (old_primary_plane_state->pitch != pitch)  in cirrus_primary_plane_helper_atomic_update()
411 		unsigned int offset = drm_fb_clip_offset(pitch, format, &damage);  in cirrus_primary_plane_helper_atomic_update()
414 		drm_fb_blit(&dst, &pitch, format->format, shadow_plane_state->data, fb,  in cirrus_primary_plane_helper_atomic_update()
415 			    &damage, &shadow_plane_state->fmtcnv_state);  in cirrus_primary_plane_helper_atomic_update()
430 	struct drm_plane_state *plane_state = plane->state;  in cirrus_primary_plane_atomic_duplicate_state()
442 	new_shadow_plane_state = &new_primary_plane_state->base;  in cirrus_primary_plane_atomic_duplicate_state()
445 	new_primary_plane_state->format = primary_plane_state->format;  in cirrus_primary_plane_atomic_duplicate_state()
446 	new_primary_plane_state->pitch = primary_plane_state->pitch;  in cirrus_primary_plane_atomic_duplicate_state()
448 	return &new_shadow_plane_state->base;  in cirrus_primary_plane_atomic_duplicate_state()
457 	__drm_gem_destroy_shadow_plane_state(&primary_plane_state->base);  in cirrus_primary_plane_atomic_destroy_state()
465 	if (plane->state) {  in cirrus_reset_primary_plane()
466 		cirrus_primary_plane_atomic_destroy_state(plane, plane->state);  in cirrus_reset_primary_plane()
467 		plane->state = NULL; /* must be set to NULL here */  in cirrus_reset_primary_plane()
473 	__drm_gem_reset_shadow_plane(plane, &primary_plane_state->base);  in cirrus_reset_primary_plane()
490 	if (!crtc_state->enable)  in cirrus_crtc_helper_atomic_check()
503 	struct cirrus_device *cirrus = to_cirrus(crtc->dev);  in cirrus_crtc_helper_atomic_enable()
507 	if (!drm_dev_enter(&cirrus->dev, &idx))  in cirrus_crtc_helper_atomic_enable()
510 	cirrus_mode_set(cirrus, &crtc_state->mode);  in cirrus_crtc_helper_atomic_enable()
541 				     connector->dev->mode_config.max_width,  in cirrus_connector_helper_get_modes()
542 				     connector->dev->mode_config.max_height);  in cirrus_connector_helper_get_modes()
561 	struct drm_device *dev = &cirrus->dev;  in cirrus_pipe_init()
568 	primary_plane = &cirrus->primary_plane;  in cirrus_pipe_init()
580 	crtc = &cirrus->crtc;  in cirrus_pipe_init()
587 	encoder = &cirrus->encoder;  in cirrus_pipe_init()
592 	encoder->possible_crtcs = drm_crtc_mask(crtc);  in cirrus_pipe_init()
594 	connector = &cirrus->connector;  in cirrus_pipe_init()
608 /* ------------------------------------------------------------------ */
614 	const struct drm_format_info *format = drm_format_info(DRM_FORMAT_XRGB8888);  in cirrus_mode_config_mode_valid()  local
615 	uint64_t pitch = drm_format_info_min_pitch(format, 0, mode->hdisplay);  in cirrus_mode_config_mode_valid()
617 	if (pitch * mode->vdisplay > CIRRUS_VRAM_SIZE)  in cirrus_mode_config_mode_valid()
632 	struct drm_device *dev = &cirrus->dev;  in cirrus_mode_config_init()
639 	dev->mode_config.min_width = 0;  in cirrus_mode_config_init()
640 	dev->mode_config.min_height = 0;  in cirrus_mode_config_init()
641 	dev->mode_config.max_width = CIRRUS_MAX_PITCH / 2;  in cirrus_mode_config_init()
642 	dev->mode_config.max_height = 1024;  in cirrus_mode_config_init()
643 	dev->mode_config.preferred_depth = 16;  in cirrus_mode_config_init()
644 	dev->mode_config.prefer_shadow = 0;  in cirrus_mode_config_init()
645 	dev->mode_config.funcs = &cirrus_mode_config_funcs;  in cirrus_mode_config_init()
650 /* ------------------------------------------------------------------ */
686 	ret = -ENOMEM;  in cirrus_pci_probe()
687 	cirrus = devm_drm_dev_alloc(&pdev->dev, &cirrus_driver,  in cirrus_pci_probe()
692 	dev = &cirrus->dev;  in cirrus_pci_probe()
694 	cirrus->vram = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0),  in cirrus_pci_probe()
696 	if (cirrus->vram == NULL)  in cirrus_pci_probe()
697 		return -ENOMEM;  in cirrus_pci_probe()
699 	cirrus->mmio = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 1),  in cirrus_pci_probe()
701 	if (cirrus->mmio == NULL)  in cirrus_pci_probe()
702 		return -ENOMEM;  in cirrus_pci_probe()