1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
From 71a27bf49d7a64959b7e60d780a1f899ead34f5f Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Mon, 13 May 2019 17:34:29 +0100
Subject: [PATCH 488/806] Revert "video: bcm2708_fb: Try allocating on the ARM
and passing to VPU"
This reverts commit ca36c709fce57e8023d2b8b354376bf161601a49.
The driver tries a cma_alloc to avoid using gpu_mem, but should
that fail the core code is logging an error with no easy way to
test whether it will succeed or fail first.
Revert until we either totally give up on gpu_mem and increase
CMA always, or find a way to try an allocation.
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/video/fbdev/bcm2708_fb.c | 102 +++------------------
include/soc/bcm2835/raspberrypi-firmware.h | 1 -
2 files changed, 12 insertions(+), 91 deletions(-)
--- a/drivers/video/fbdev/bcm2708_fb.c
+++ b/drivers/video/fbdev/bcm2708_fb.c
@@ -98,11 +98,6 @@ struct bcm2708_fb {
struct bcm2708_fb_stats stats;
unsigned long fb_bus_address;
struct { u32 base, length; } gpu;
-
- bool disable_arm_alloc;
- unsigned int image_size;
- dma_addr_t dma_addr;
- void *cpuaddr;
};
#define to_bcm2708(info) container_of(info, struct bcm2708_fb, fb)
@@ -288,88 +283,23 @@ static int bcm2708_fb_set_par(struct fb_
.xoffset = info->var.xoffset,
.yoffset = info->var.yoffset,
.tag5 = { RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE, 8, 0 },
- /* base and screen_size will be initialised later */
- .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH, 4, 0 },
- /* pitch will be initialised later */
+ .base = 0,
+ .screen_size = 0,
+ .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH, 4, 0 },
+ .pitch = 0,
};
- int ret, image_size;
-
+ int ret;
print_debug("%s(%p) %dx%d (%dx%d), %d, %d\n", __func__, info,
info->var.xres, info->var.yres, info->var.xres_virtual,
info->var.yres_virtual, (int)info->screen_size,
info->var.bits_per_pixel);
- /* Try allocating our own buffer. We can specify all the parameters */
- image_size = ((info->var.xres * info->var.yres) *
- info->var.bits_per_pixel) >> 3;
-
- if (!fb->disable_arm_alloc &&
- (image_size != fb->image_size || !fb->dma_addr)) {
- if (fb->dma_addr) {
- dma_free_coherent(info->device, fb->image_size,
- fb->cpuaddr, fb->dma_addr);
- fb->image_size = 0;
- fb->cpuaddr = NULL;
- fb->dma_addr = 0;
- }
-
- fb->cpuaddr = dma_alloc_coherent(info->device, image_size,
- &fb->dma_addr, GFP_KERNEL);
-
- if (!fb->cpuaddr) {
- fb->dma_addr = 0;
- fb->disable_arm_alloc = true;
- } else {
- fb->image_size = image_size;
- }
- }
-
- if (fb->cpuaddr) {
- fbinfo.base = fb->dma_addr;
- fbinfo.screen_size = image_size;
- fbinfo.pitch = (info->var.xres * info->var.bits_per_pixel) >> 3;
-
- ret = rpi_firmware_property_list(fb->fw, &fbinfo,
- sizeof(fbinfo));
- if (ret || fbinfo.base != fb->dma_addr) {
- /* Firmware either failed, or assigned a different base
- * address (ie it doesn't support being passed an FB
- * allocation).
- * Destroy the allocation, and don't try again.
- */
- dma_free_coherent(info->device, fb->image_size,
- fb->cpuaddr, fb->dma_addr);
- fb->image_size = 0;
- fb->cpuaddr = NULL;
- fb->dma_addr = 0;
- fb->disable_arm_alloc = true;
- }
- } else {
- /* Our allocation failed - drop into the old scheme of
- * allocation by the VPU.
- */
- ret = -ENOMEM;
- }
-
+ ret = rpi_firmware_property_list(fb->fw, &fbinfo, sizeof(fbinfo));
if (ret) {
- /* Old scheme:
- * - FRAMEBUFFER_ALLOCATE passes 0 for base and screen_size.
- * - GET_PITCH instead of SET_PITCH.
- */
- fbinfo.base = 0;
- fbinfo.screen_size = 0;
- fbinfo.tag6.tag = RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH;
- fbinfo.pitch = 0;
-
- ret = rpi_firmware_property_list(fb->fw, &fbinfo,
- sizeof(fbinfo));
- if (ret) {
- dev_err(info->device,
- "Failed to allocate GPU framebuffer (%d)\n",
- ret);
- return ret;
- }
+ dev_err(info->device,
+ "Failed to allocate GPU framebuffer (%d)\n", ret);
+ return ret;
}
if (info->var.bits_per_pixel <= 8)
@@ -384,17 +314,9 @@ static int bcm2708_fb_set_par(struct fb_
fb->fb.fix.smem_start = fbinfo.base;
fb->fb.fix.smem_len = fbinfo.pitch * fbinfo.yres_virtual;
fb->fb.screen_size = fbinfo.screen_size;
-
- if (!fb->dma_addr) {
- if (fb->fb.screen_base)
- iounmap(fb->fb.screen_base);
-
- fb->fb.screen_base = ioremap_wc(fbinfo.base,
- fb->fb.screen_size);
- } else {
- fb->fb.screen_base = fb->cpuaddr;
- }
-
+ if (fb->fb.screen_base)
+ iounmap(fb->fb.screen_base);
+ fb->fb.screen_base = ioremap_wc(fbinfo.base, fb->fb.screen_size);
if (!fb->fb.screen_base) {
/* the console may currently be locked */
console_trylock();
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -128,7 +128,6 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH = 0x00048005,
RPI_FIRMWARE_FRAMEBUFFER_SET_PIXEL_ORDER = 0x00048006,
RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE = 0x00048007,
- RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH = 0x00048008,
RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET = 0x00048009,
RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN = 0x0004800a,
RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE = 0x0004800b,
|
