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#1 Re: 全志 SOC » V3s 主线linux ILI9341 DRM驱动oops » 2023-05-13 12:57:03

上述修复有个问题 就是每次刷新的矩形区域最下面不能显示一排像素,我又修改了一下现在好多了

static void drm_fb_helper_damage_blit_real(struct drm_fb_helper *fb_helper,
					   struct drm_clip_rect *clip,
					   struct iosys_map *dst)
{
	struct drm_framebuffer *fb = fb_helper->fb;
	unsigned int cpp = fb->format->cpp[0];
	size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp;
	void *src = fb_helper->fbdev->screen_buffer + offset;
	size_t len = (clip->x2 - clip->x1) * cpp;
	unsigned int y;

	iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
	//for (y = clip->y1; y < clip->y2; y++) {
	int max_y = fb->height;
	//printk("height = %d",fb->height);
	int real_y = clip -> y2 > max_y ? clip -> y2 - 1 : clip -> y2;
	for (y = clip->y1; y < real_y; y++) {
		iosys_map_memcpy_to(dst, 0, src, len);
		iosys_map_incr(dst, fb->pitches[0]);
		src += fb->pitches[0];
	}
}

#2 Re: 全志 SOC » V3s 主线linux ILI9341 DRM驱动oops » 2023-05-10 23:03:58

定位到问题了 drivers/gpu/drm/drm_fb_helper.c
函数drm_fb_helper_damage_blit_real

static void drm_fb_helper_damage_blit_real(struct drm_fb_helper *fb_helper,
					   struct drm_clip_rect *clip,
					   struct iosys_map *dst)
{
//printk("drm_fb_helper_damage_blit_real entrance");
	struct drm_framebuffer *fb = fb_helper->fb;
	unsigned int cpp = fb->format->cpp[0];
	size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp;
	void *src = fb_helper->fbdev->screen_buffer + offset;
	size_t len = (clip->x2 - clip->x1) * cpp;
	unsigned int y;

	iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
//printk("drm_fb_helper_damage_blit_real 1");
        //大概是这里y越界 减小1之后可以显示图片
	//for (y = clip->y1; y < clip->y2; y++) {
	for (y = clip->y1; y < clip->y2 - 1; y++) {
//printk("y = %d",y);
		iosys_map_memcpy_to(dst, 0, src, len);
		iosys_map_incr(dst, fb->pitches[0]);
		src += fb->pitches[0];
	}
//printk("drm_fb_helper_damage_blit_real ret");
}

#3 全志 SOC » V3s 主线linux ILI9341 DRM驱动oops » 2023-05-10 21:56:36

Catium
回复: 2

主线linux5.19 开启了CONFIG_TINYDRM_ILI9341,启动可以显示logo并打印控制台

用fbv看图,图片长宽比屏幕长宽都明显小就能显示,否则oops而且没图像
用fb-test也会这样

报错之后还不能软件reboot了,而且后续/dev/fb0怎么操作屏幕都没反应,reset后恢复正常

设备树

&spi0 {
	status = "okay";
	ili9341@0 {
       		compatible = "adafruit,yx240qv29";
		pinctrl-names = "default";
		pinctrl-0 = <&ili9341_pins>;
		#address-cells = <1>;
		#size-cells = <1>;
		reg = <0>;
		spi-cpol;
       		spi-cpha;
        	rgb;
		fps = <30>;
		rotation = <90>;
       		spi-max-frequency = <50000000>;
        	reset-gpios = <&pio 1 6 GPIO_ACTIVE_HIGH>;
        	dc-gpios = <&pio 1 7 GPIO_ACTIVE_HIGH>;
        	buswidth =<8>; 
		power-supply = <&reg_vcc3v3>;
	};

};

oops

# fbv l2d.png
fbv - The Framebuffer Viewer
l2d.png
280 x 250
[   39.402276] 8<--- cut here ---
[   39.405380] Unable to handle kernel paging request at virtual address c496000                                                           0
[   39.412700] [c4960000] *pgd=4100b811, *pte=00000000, *ppte=00000000
[   39.418997] Internal error: Oops: 7 [#1] SMP ARM
[   39.423615] Modules linked in:
[   39.426672] CPU: 0 PID: 54 Comm: kworker/0:2 Not tainted 5.19.0-CatiumDeck_V3                                                           s #19
[   39.434238] Hardware name: Allwinner sun8i Family
[   39.438939] Workqueue: events drm_fb_helper_damage_work
[   39.444186] PC is at mmiocpy+0x4c/0x334
[   39.448029] LR is at 0x0
[   39.450563] pc : [<c048cfcc>]    lr : [<00000000>]    psr: 20070013
[   39.456823] sp : c4965eb0  ip : 00000000  fp : c4965ec0
[   39.462042] r10: c4938f80  r9 : 00000000  r8 : 00000000
[   39.467261] r7 : c13f2040  r6 : 00000000  r5 : 00000000  r4 : 00000000
[   39.473781] r3 : 00000000  r2 : 00000180  r1 : c4960000  r0 : c4939000
[   39.480303] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[   39.487432] Control: 10c5387d  Table: 41ba406a  DAC: 00000051
[   39.493170] Register r0 information: 0-page vmalloc region starting at 0xc491                                                           3000 allocated at dma_common_contiguous_remap+0x64/0x80
[   39.505089] Register r1 information: 38-page vmalloc region starting at 0xc49                                                           3a000 allocated at drm_fb_helper_generic_probe+0xe8/0x19c
[   39.517172] Register r2 information: non-paged memory
[   39.522222] Register r3 information: NULL pointer
[   39.526924] Register r4 information: NULL pointer
[   39.531623] Register r5 information: NULL pointer
[   39.536324] Register r6 information: NULL pointer
[   39.541025] Register r7 information: slab kmalloc-64 start c13f2040 pointer o                                                           ffset 0 size 64
[   39.549479] Register r8 information: NULL pointer
[   39.554181] Register r9 information: NULL pointer
[   39.558882] Register r10 information: 0-page vmalloc region starting at 0xc49                                                           13000 allocated at dma_common_contiguous_remap+0x64/0x80
[   39.570876] Register r11 information: 2-page vmalloc region starting at 0xc49                                                           64000 allocated at kernel_clone+0x94/0x370
[   39.581655] Register r12 information: NULL pointer
[   39.586443] Process kworker/0:2 (pid: 54, stack limit = 0x57579c6a)
[   39.592755] Stack: (0xc4965eb0 to 0xc4966000)
[   39.597114] 5ea0:                                     000000f3 c13ef190 c13a9                                                           0c0 c495ff80
[   39.605285] 5ec0: c4938f80 00000280 00000000 c057105c c0e94df4 c0e94e00 c0e94                                                           dec c0571d90
[   39.613456] 5ee0: 000000f4 c102e000 c13ef1b4 c13ef194 00000000 c4913000 00000                                                           000 00000000
[   39.621627] 5f00: 00f40140 82dd4a9d c0e94e08 c13ef194 c1881e80 c3f66d80 c3f69                                                           e00 00000000
[   39.629798] 5f20: 00000000 c3f69e05 c13b2200 c0135c70 c3f66d80 c3f66d80 c3f66                                                           d9c c1881e80
[   39.637969] 5f40: c3f66d80 c1881e98 c3f66d9c c0e03d40 00000008 c13b2200 c3f66                                                           d80 c0135ed4
[   39.646140] 5f60: c1881e80 c0ecb1ae c4829ecc c1898000 c13b2200 c0135e7c c1881                                                           e80 c18980c0
[   39.654311] 5f80: c4829ecc 00000000 00000000 c013d5f4 c1898000 c013d524 00000                                                           000 00000000
[   39.662481] 5fa0: 00000000 00000000 00000000 c0100148 00000000 00000000 00000                                                           000 00000000
[   39.670651] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000                                                           000 00000000
[   39.678821] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000                                                           000 00000000
[   39.687001]  mmiocpy from drm_fb_helper_damage_work+0x29c/0x2f8
[   39.692934]  drm_fb_helper_damage_work from process_one_work+0x1d8/0x3e4
[   39.699644]  process_one_work from worker_thread+0x58/0x54c
[   39.705218]  worker_thread from kthread+0xd0/0xec
[   39.709932]  kthread from ret_from_fork+0x14/0x2c
[   39.714641] Exception stack(0xc4965fb0 to 0xc4965ff8)
[   39.719691] 5fa0:                                     00000000 00000000 00000                                                           000 00000000
[   39.727861] 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000                                                           000 00000000
[   39.736030] 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[   39.742643] Code: ba000002 f5d1f03c f5d1f05c f5d1f07c (e8b15378)
[   39.748946] ---[ end trace 0000000000000000 ]---

佬们有没有遇到过的说下问题何在

#4 Re: 全志 SOC » linux /dev处ttyXX和ptyXX数量过多 » 2023-05-07 16:18:39

Device Drivers -> Character devices Maximum number of legacy PTY in use
改小一点就行

页脚

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