tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) STMicroelectronics SA 2017
4 *
5 * Authors: Philippe Cornu <philippe.cornu@st.com>
6 * Yannick Fertre <yannick.fertre@st.com>
7 * Fabien Dessenne <fabien.dessenne@st.com>
8 * Mickael Reulier <mickael.reulier@st.com>
9 */
10
11#ifndef _LTDC_H_
12#define _LTDC_H_
13
14struct ltdc_caps {
15 u32 hw_version; /* hardware version */
16 u32 nb_layers; /* number of supported layers */
17 u32 reg_ofs; /* register offset for applicable regs */
18 u32 bus_width; /* bus width (32 or 64 bits) */
19 const u32 *pix_fmt_hw; /* supported pixel formats */
20 bool non_alpha_only_l1; /* non-native no-alpha formats on layer 1 */
21 int pad_max_freq_hz; /* max frequency supported by pad */
22};
23
24#define LTDC_MAX_LAYER 4
25
26struct fps_info {
27 unsigned int counter;
28 ktime_t last_timestamp;
29};
30
31struct ltdc_device {
32 void __iomem *regs;
33 struct clk *pixel_clk; /* lcd pixel clock */
34 struct mutex err_lock; /* protecting error_status */
35 struct ltdc_caps caps;
36 u32 error_status;
37 u32 irq_status;
38 struct fps_info plane_fpsi[LTDC_MAX_LAYER];
39 struct drm_atomic_state *suspend_state;
40};
41
42bool ltdc_crtc_scanoutpos(struct drm_device *dev, unsigned int pipe,
43 bool in_vblank_irq, int *vpos, int *hpos,
44 ktime_t *stime, ktime_t *etime,
45 const struct drm_display_mode *mode);
46
47int ltdc_load(struct drm_device *ddev);
48void ltdc_unload(struct drm_device *ddev);
49void ltdc_suspend(struct drm_device *ddev);
50int ltdc_resume(struct drm_device *ddev);
51
52#endif