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[34.141.249.170]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8eda748aa6sm181308666b.1.2026.02.07.07.37.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Feb 2026 07:37:04 -0800 (PST) From: Artem Lytkin To: Sudip Mukherjee , Teddy Wang , Greg Kroah-Hartman Cc: linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Artem Lytkin Subject: [PATCH v4 1/3] staging: sm750fb: remove debug and diagnostic prints Date: Sat, 7 Feb 2026 15:37:01 +0000 Message-ID: <20260207153703.2049-2-iprintercanon@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260207153703.2049-1-iprintercanon@gmail.com> References: <20260207153703.2049-1-iprintercanon@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Remove all pr_info, pr_debug, and pr_warn calls that dump internal variable values, pointer addresses, and structure contents not useful for production use. This includes the complete fb_find_mode() result logging in lynxfb_set_fbinfo(), the CH7301 DVI chip status messages in hw_sm750_inithw(), and various debug prints throughout the driver. Signed-off-by: Artem Lytkin --- drivers/staging/sm750fb/sm750.c | 76 +----------------------------- drivers/staging/sm750fb/sm750_hw.c | 18 +------ 2 files changed, 3 insertions(+), 91 deletions(-) diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm75= 0.c index fecd7457e..987ba8772 100644 --- a/drivers/staging/sm750fb/sm750.c +++ b/drivers/staging/sm750fb/sm750.c @@ -375,7 +375,6 @@ static int lynxfb_ops_set_par(struct fb_info *info) line_length =3D var->xres_virtual * var->bits_per_pixel / 8; line_length =3D ALIGN(line_length, crtc->line_pad); fix->line_length =3D line_length; - pr_info("fix->line_length =3D %d\n", fix->line_length); =20 /* * var->red,green,blue,transp are need to be set by driver @@ -485,11 +484,6 @@ static int lynxfb_ops_check_var(struct fb_var_screenin= fo *var, par =3D info->par; crtc =3D &par->crtc; =20 - pr_debug("check var:%dx%d-%d\n", - var->xres, - var->yres, - var->bits_per_pixel); - ret =3D lynxfb_set_color_offsets(info); =20 if (ret) { @@ -580,7 +574,6 @@ static int lynxfb_ops_blank(int blank, struct fb_info *= info) struct lynxfb_par *par; struct lynxfb_output *output; =20 - pr_debug("blank =3D %d.\n", blank); par =3D info->par; output =3D &par->output; sm750_dev =3D par->dev; @@ -625,7 +618,6 @@ static int sm750fb_set_drv(struct lynxfb_par *par) crtc->channel =3D sm750_primary; crtc->o_screen =3D 0; crtc->v_screen =3D sm750_dev->pvMem; - pr_info("use simul primary mode\n"); break; case sm750_simul_sec: output->paths =3D sm750_pnc; @@ -734,12 +726,6 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int= index) lynx750_ext, NULL, vesa_modes, }; int cdb[] =3D {ARRAY_SIZE(lynx750_ext), 0, VESA_MODEDB_SIZE}; - static const char * const mdb_desc[] =3D { - "driver prepared modes", - "kernel prepared default modedb", - "kernel HELPERS prepared vesa_modes", - }; - static const char *fixId[2] =3D { "sm750_fb1", "sm750_fb2", }; @@ -767,7 +753,6 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int = index) crtc->cursor.mmio =3D sm750_dev->pvReg + 0x800f0 + (int)crtc->channel * 0x140; =20 - pr_info("crtc->cursor.mmio =3D %p\n", crtc->cursor.mmio); crtc->cursor.max_h =3D 64; crtc->cursor.max_w =3D 64; crtc->cursor.size =3D crtc->cursor.max_h * crtc->cursor.max_w * 2 / 8; @@ -801,47 +786,10 @@ static int lynxfb_set_fbinfo(struct fb_info *info, in= t index) ret =3D fb_find_mode(var, info, g_fbmode[index], pdb[i], cdb[i], NULL, 8); =20 - if (ret =3D=3D 1) { - pr_info("success! use specified mode:%s in %s\n", - g_fbmode[index], - mdb_desc[i]); + if (ret =3D=3D 1 || ret =3D=3D 2) break; - } else if (ret =3D=3D 2) { - pr_warn("use specified mode:%s in %s,with an ignored refresh rate\n", - g_fbmode[index], - mdb_desc[i]); - break; - } else if (ret =3D=3D 3) { - pr_warn("wanna use default mode\n"); - /*break;*/ - } else if (ret =3D=3D 4) { - pr_warn("fall back to any valid mode\n"); - } else { - pr_warn("ret =3D %d,fb_find_mode failed,with %s\n", - ret, - mdb_desc[i]); - } } =20 - /* some member of info->var had been set by fb_find_mode */ - - pr_info("Member of info->var is :\n" - "xres=3D%d\n" - "yres=3D%d\n" - "xres_virtual=3D%d\n" - "yres_virtual=3D%d\n" - "xoffset=3D%d\n" - "yoffset=3D%d\n" - "bits_per_pixel=3D%d\n" - " ...\n", - var->xres, - var->yres, - var->xres_virtual, - var->yres_virtual, - var->xoffset, - var->yoffset, - var->bits_per_pixel); - /* set par */ par->info =3D info; =20 @@ -851,7 +799,6 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int = index) =20 info->pseudo_palette =3D &par->pseudo_palette[0]; info->screen_base =3D crtc->v_screen; - pr_debug("screen_base vaddr =3D %p\n", info->screen_base); info->screen_size =3D line_length * var->yres_virtual; =20 /* set info->fix */ @@ -865,7 +812,6 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int = index) strscpy(fix->id, fixId[index], sizeof(fix->id)); =20 fix->smem_start =3D crtc->o_screen + sm750_dev->vidmem_start; - pr_info("fix->smem_start =3D %lx\n", fix->smem_start); /* * according to mmap experiment from user space application, * fix->mmio_len should not larger than virtual size @@ -874,13 +820,10 @@ static int lynxfb_set_fbinfo(struct fb_info *info, in= t index) * data into the bound over virtual size */ fix->smem_len =3D crtc->vidmem_size; - pr_info("fix->smem_len =3D %x\n", fix->smem_len); info->screen_size =3D fix->smem_len; fix->line_length =3D line_length; fix->mmio_start =3D sm750_dev->vidreg_start; - pr_info("fix->mmio_start =3D %lx\n", fix->mmio_start); fix->mmio_len =3D sm750_dev->vidreg_size; - pr_info("fix->mmio_len =3D %x\n", fix->mmio_len); =20 lynxfb_set_visual_mode(info); =20 @@ -889,22 +832,12 @@ static int lynxfb_set_fbinfo(struct fb_info *info, in= t index) var->accel_flags =3D 0; var->vmode =3D FB_VMODE_NONINTERLACED; =20 - pr_debug("#1 show info->cmap :\nstart=3D%d,len=3D%d,red=3D%p,green=3D%p,b= lue=3D%p,transp=3D%p\n", - info->cmap.start, info->cmap.len, - info->cmap.red, info->cmap.green, info->cmap.blue, - info->cmap.transp); - ret =3D fb_alloc_cmap(&info->cmap, 256, 0); if (ret < 0) { pr_err("Could not allocate memory for cmap.\n"); goto exit; } =20 - pr_debug("#2 show info->cmap :\nstart=3D%d,len=3D%d,red=3D%p,green=3D%p,b= lue=3D%p,transp=3D%p\n", - info->cmap.start, info->cmap.len, - info->cmap.red, info->cmap.green, info->cmap.blue, - info->cmap.transp); - exit: lynxfb_ops_check_var(var, info); return ret; @@ -1131,12 +1064,8 @@ static int __init lynxfb_setup(char *options) int len; char *opt, *tmp; =20 - if (!options || !*options) { - pr_warn("no options.\n"); + if (!options || !*options) return 0; - } - - pr_info("options:%s\n", options); =20 len =3D strlen(options) + 1; g_settings =3D kzalloc(len, GFP_KERNEL); @@ -1173,7 +1102,6 @@ static int __init lynxfb_setup(char *options) } =20 /* misc g_settings are transport to chip specific routines */ - pr_info("parameter left for chip specific analysis:%s\n", g_settings); return 0; } =20 diff --git a/drivers/staging/sm750fb/sm750_hw.c b/drivers/staging/sm750fb/s= m750_hw.c index ce46f240c..983b51164 100644 --- a/drivers/staging/sm750fb/sm750_hw.c +++ b/drivers/staging/sm750fb/sm750_hw.c @@ -34,8 +34,6 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_= dev *pdev) sm750_dev->vidreg_start =3D pci_resource_start(pdev, 1); sm750_dev->vidreg_size =3D SZ_2M; =20 - pr_info("mmio phyAddr =3D %lx\n", sm750_dev->vidreg_start); - /* * reserve the vidreg space of smi adaptor * if you do this, you need to add release region code @@ -56,7 +54,6 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_= dev *pdev) ret =3D -EFAULT; goto exit; } - pr_info("mmio virtual addr =3D %p\n", sm750_dev->pvReg); =20 sm750_dev->accel.dpr_base =3D sm750_dev->pvReg + DE_BASE_ADDR_TYPE1; sm750_dev->accel.dp_port_base =3D sm750_dev->pvReg + DE_PORT_ADDR_TYPE1; @@ -72,8 +69,6 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_= dev *pdev) * @ddk750_get_vm_size function can be safe. */ sm750_dev->vidmem_size =3D ddk750_get_vm_size(); - pr_info("video memory phyAddr =3D %lx, size =3D %u bytes\n", - sm750_dev->vidmem_start, sm750_dev->vidmem_size); =20 /* reserve the vidmem space of smi adaptor */ sm750_dev->pvMem =3D @@ -84,7 +79,6 @@ int hw_sm750_map(struct sm750_dev *sm750_dev, struct pci_= dev *pdev) ret =3D -EFAULT; goto exit; } - pr_info("video memory vaddr =3D %p\n", sm750_dev->pvMem); exit: return ret; } @@ -163,11 +157,9 @@ int hw_sm750_inithw(struct sm750_dev *sm750_dev, struc= t pci_dev *pdev) * The following register values for CH7301 are from * Chrontel app note and our experiment. */ - pr_info("yes,CH7301 DVI chip found\n"); sm750_sw_i2c_write_reg(0xec, 0x1d, 0x16); sm750_sw_i2c_write_reg(0xec, 0x21, 0x9); sm750_sw_i2c_write_reg(0xec, 0x49, 0xC0); - pr_info("okay,CH7301 DVI chip setup done\n"); } } =20 @@ -192,14 +184,12 @@ int hw_sm750_output_set_mode(struct lynxfb_output *ou= tput, =20 if (sm750_get_chip_type() !=3D SM750LE) { if (channel =3D=3D sm750_primary) { - pr_info("primary channel\n"); if (output->paths & sm750_panel) disp_set |=3D do_LCD1_PRI; if (output->paths & sm750_crt) disp_set |=3D do_CRT_PRI; =20 } else { - pr_info("secondary channel\n"); if (output->paths & sm750_panel) disp_set |=3D do_LCD1_SEC; if (output->paths & sm750_crt) @@ -215,7 +205,6 @@ int hw_sm750_output_set_mode(struct lynxfb_output *outp= ut, poke32(DISPLAY_CONTROL_750LE, reg); } =20 - pr_info("ddk setlogicdispout done\n"); return ret; } =20 @@ -232,10 +221,8 @@ int hw_sm750_crtc_check_mode(struct lynxfb_crtc *crtc, case 16: break; case 32: - if (sm750_dev->revid =3D=3D SM750LE_REVISION_ID) { - pr_debug("750le do not support 32bpp\n"); + if (sm750_dev->revid =3D=3D SM750LE_REVISION_ID) return -EINVAL; - } break; default: return -EINVAL; @@ -302,7 +289,6 @@ int hw_sm750_crtc_set_mode(struct lynxfb_crtc *crtc, else clock =3D SECONDARY_PLL; =20 - pr_debug("Request pixel clock =3D %lu\n", modparm.pixel_clock); ret =3D ddk750_set_mode_timing(&modparm, clock); if (ret) { pr_err("Set mode timing failed\n"); @@ -431,12 +417,10 @@ int hw_sm750_set_blank(struct lynxfb_output *output, = int blank) =20 switch (blank) { case FB_BLANK_UNBLANK: - pr_debug("flag =3D FB_BLANK_UNBLANK\n"); dpms =3D SYSTEM_CTRL_DPMS_VPHP; pps =3D PANEL_DISPLAY_CTRL_DATA; break; case FB_BLANK_NORMAL: - pr_debug("flag =3D FB_BLANK_NORMAL\n"); dpms =3D SYSTEM_CTRL_DPMS_VPHP; crtdb =3D CRT_DISPLAY_CTRL_BLANK; break; --=20 2.43.0