2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3 * Copyright (c) 2014, Inforce Computing. All rights reserved.
5 * Author: Vinay Simha <vinaysimha@inforcecomputing.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <drm/drm_crtc.h>
21 #include <drm/drm_crtc_helper.h>
25 struct mdp4_dsi_encoder {
26 struct drm_encoder base;
27 struct drm_panel *panel;
30 #define to_mdp4_dsi_encoder(x) container_of(x, struct mdp4_dsi_encoder, base)
32 static struct mdp4_kms *get_kms(struct drm_encoder *encoder)
34 struct msm_drm_private *priv = encoder->dev->dev_private;
35 return to_mdp4_kms(to_mdp_kms(priv->kms));
38 static void mdp4_dsi_encoder_destroy(struct drm_encoder *encoder)
40 struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder);
42 drm_encoder_cleanup(encoder);
43 kfree(mdp4_dsi_encoder);
46 static const struct drm_encoder_funcs mdp4_dsi_encoder_funcs = {
47 .destroy = mdp4_dsi_encoder_destroy,
50 static void mdp4_dsi_encoder_mode_set(struct drm_encoder *encoder,
51 struct drm_display_mode *mode,
52 struct drm_display_mode *adjusted_mode)
54 struct mdp4_kms *mdp4_kms = get_kms(encoder);
55 uint32_t dsi_hsync_skew, vsync_period, vsync_len, ctrl_pol;
56 uint32_t display_v_start, display_v_end;
57 uint32_t hsync_start_x, hsync_end_x;
61 DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
64 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
65 ctrl_pol |= MDP4_DSI_CTRL_POLARITY_HSYNC_LOW;
66 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
67 ctrl_pol |= MDP4_DSI_CTRL_POLARITY_VSYNC_LOW;
68 /* probably need to get DATA_EN polarity from panel.. */
70 dsi_hsync_skew = 0; /* get this from panel? */
72 hsync_start_x = (mode->htotal - mode->hsync_start);
73 hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
75 vsync_period = mode->vtotal * mode->htotal;
76 vsync_len = (mode->vsync_end - mode->vsync_start) * mode->htotal;
77 display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dsi_hsync_skew;
78 display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dsi_hsync_skew - 1;
80 mdp4_write(mdp4_kms, REG_MDP4_DSI_HSYNC_CTRL,
81 MDP4_DSI_HSYNC_CTRL_PULSEW(mode->hsync_end - mode->hsync_start) |
82 MDP4_DSI_HSYNC_CTRL_PERIOD(mode->htotal));
83 mdp4_write(mdp4_kms, REG_MDP4_DSI_VSYNC_PERIOD, vsync_period);
84 mdp4_write(mdp4_kms, REG_MDP4_DSI_VSYNC_LEN, vsync_len);
85 mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_HCTRL,
86 MDP4_DSI_DISPLAY_HCTRL_START(hsync_start_x) |
87 MDP4_DSI_DISPLAY_HCTRL_END(hsync_end_x));
88 mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_VSTART, display_v_start);
89 mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_VEND, display_v_end);
91 mdp4_write(mdp4_kms, REG_MDP4_DSI_CTRL_POLARITY, ctrl_pol);
92 mdp4_write(mdp4_kms, REG_MDP4_DSI_UNDERFLOW_CLR,
93 MDP4_DSI_UNDERFLOW_CLR_ENABLE_RECOVERY |
94 MDP4_DSI_UNDERFLOW_CLR_COLOR(0xff));
95 mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_HCTL,
96 MDP4_DSI_ACTIVE_HCTL_START(0) |
97 MDP4_DSI_ACTIVE_HCTL_END(0));
98 mdp4_write(mdp4_kms, REG_MDP4_DSI_HSYNC_SKEW, dsi_hsync_skew);
99 mdp4_write(mdp4_kms, REG_MDP4_DSI_BORDER_CLR, 0);
100 mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_VSTART, 0);
101 mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_VEND, 0);
104 static void mdp4_dsi_encoder_disable(struct drm_encoder *encoder)
106 struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder);
107 struct mdp4_kms *mdp4_kms = get_kms(encoder);
109 if (!mdp4_dsi_encoder->enabled)
112 mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0);
115 * Wait for a vsync so we know the ENABLE=0 latched before
116 * the (connector) source of the vsync's gets disabled,
117 * otherwise we end up in a funny state if we re-enable
118 * before the disable latches, which results that some of
119 * the settings changes for the new modeset (like new
120 * scanout buffer) don't latch properly..
122 mdp_irq_wait(&mdp4_kms->base, MDP4_IRQ_PRIMARY_VSYNC);
124 mdp4_dsi_encoder->enabled = false;
127 static void mdp4_dsi_encoder_enable(struct drm_encoder *encoder)
129 struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder);
130 struct mdp4_kms *mdp4_kms = get_kms(encoder);
132 if (mdp4_dsi_encoder->enabled)
135 mdp4_crtc_set_config(encoder->crtc,
136 MDP4_DMA_CONFIG_PACK_ALIGN_MSB |
137 MDP4_DMA_CONFIG_DEFLKR_EN |
138 MDP4_DMA_CONFIG_DITHER_EN |
139 MDP4_DMA_CONFIG_R_BPC(BPC8) |
140 MDP4_DMA_CONFIG_G_BPC(BPC8) |
141 MDP4_DMA_CONFIG_B_BPC(BPC8) |
142 MDP4_DMA_CONFIG_PACK(0x21));
144 mdp4_crtc_set_intf(encoder->crtc, INTF_DSI_VIDEO, 0);
146 mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 1);
148 mdp4_dsi_encoder->enabled = true;
151 static const struct drm_encoder_helper_funcs mdp4_dsi_encoder_helper_funcs = {
152 .mode_set = mdp4_dsi_encoder_mode_set,
153 .disable = mdp4_dsi_encoder_disable,
154 .enable = mdp4_dsi_encoder_enable,
157 /* initialize encoder */
158 struct drm_encoder *mdp4_dsi_encoder_init(struct drm_device *dev)
160 struct drm_encoder *encoder = NULL;
161 struct mdp4_dsi_encoder *mdp4_dsi_encoder;
164 mdp4_dsi_encoder = kzalloc(sizeof(*mdp4_dsi_encoder), GFP_KERNEL);
165 if (!mdp4_dsi_encoder) {
170 encoder = &mdp4_dsi_encoder->base;
172 drm_encoder_init(dev, encoder, &mdp4_dsi_encoder_funcs,
173 DRM_MODE_ENCODER_DSI, NULL);
174 drm_encoder_helper_add(encoder, &mdp4_dsi_encoder_helper_funcs);
180 mdp4_dsi_encoder_destroy(encoder);