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Merge tag 'drm-fixes-2018-10-19' of git://anongit.freedesktop.org/drm…
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…/drm

Dave writes:
  "drm fixes for 4.19 final

   Just a last set of misc core fixes for final.

   4 fixes, one use after free, one fb integration fix, one EDID fix,
   and one laptop panel quirk,"

* tag 'drm-fixes-2018-10-19' of git://anongit.freedesktop.org/drm/drm:
  drm/edid: VSDB yCBCr420 Deep Color mode bit definitions
  drm: fix use of freed memory in drm_mode_setcrtc
  drm: fb-helper: Reject all pixel format changing requests
  drm/edid: Add 6 bpc quirk for BOE panel in HP Pavilion 15-n233sl
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@gregkh
gregkh committed Oct 19, 2018
2 parents eb6d938 + f8e6e1b commit 7555c5d
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Showing 4 changed files with 40 additions and 72 deletions.
10 changes: 7 additions & 3 deletions drivers/gpu/drm/drm_crtc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -567,9 +567,9 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
struct drm_mode_crtc *crtc_req = data;
struct drm_crtc *crtc;
struct drm_plane *plane;
struct drm_connector **connector_set = NULL, *connector;
struct drm_framebuffer *fb = NULL;
struct drm_display_mode *mode = NULL;
struct drm_connector **connector_set, *connector;
struct drm_framebuffer *fb;
struct drm_display_mode *mode;
struct drm_mode_set set;
uint32_t __user *set_connectors_ptr;
struct drm_modeset_acquire_ctx ctx;
Expand Down Expand Up @@ -598,6 +598,10 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
mutex_lock(&crtc->dev->mode_config.mutex);
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
retry:
connector_set = NULL;
fb = NULL;
mode = NULL;

ret = drm_modeset_lock_all_ctx(crtc->dev, &ctx);
if (ret)
goto out;
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5 changes: 4 additions & 1 deletion drivers/gpu/drm/drm_edid.c
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Original file line number Diff line number Diff line change
Expand Up @@ -113,6 +113,9 @@ static const struct edid_quirk {
/* AEO model 0 reports 8 bpc, but is a 6 bpc panel */
{ "AEO", 0, EDID_QUIRK_FORCE_6BPC },

/* BOE model on HP Pavilion 15-n233sl reports 8 bpc, but is a 6 bpc panel */
{ "BOE", 0x78b, EDID_QUIRK_FORCE_6BPC },

/* CPT panel of Asus UX303LA reports 8 bpc, but is a 6 bpc panel */
{ "CPT", 0x17df, EDID_QUIRK_FORCE_6BPC },

Expand Down Expand Up @@ -4279,7 +4282,7 @@ static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector,
struct drm_hdmi_info *hdmi = &connector->display_info.hdmi;

dc_mask = db[7] & DRM_EDID_YCBCR420_DC_MASK;
hdmi->y420_dc_modes |= dc_mask;
hdmi->y420_dc_modes = dc_mask;
}

static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector,
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91 changes: 26 additions & 65 deletions drivers/gpu/drm/drm_fb_helper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1580,6 +1580,25 @@ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
}
EXPORT_SYMBOL(drm_fb_helper_ioctl);

static bool drm_fb_pixel_format_equal(const struct fb_var_screeninfo *var_1,
const struct fb_var_screeninfo *var_2)
{
return var_1->bits_per_pixel == var_2->bits_per_pixel &&
var_1->grayscale == var_2->grayscale &&
var_1->red.offset == var_2->red.offset &&
var_1->red.length == var_2->red.length &&
var_1->red.msb_right == var_2->red.msb_right &&
var_1->green.offset == var_2->green.offset &&
var_1->green.length == var_2->green.length &&
var_1->green.msb_right == var_2->green.msb_right &&
var_1->blue.offset == var_2->blue.offset &&
var_1->blue.length == var_2->blue.length &&
var_1->blue.msb_right == var_2->blue.msb_right &&
var_1->transp.offset == var_2->transp.offset &&
var_1->transp.length == var_2->transp.length &&
var_1->transp.msb_right == var_2->transp.msb_right;
}

/**
* drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var
* @var: screeninfo to check
Expand All @@ -1590,7 +1609,6 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
{
struct drm_fb_helper *fb_helper = info->par;
struct drm_framebuffer *fb = fb_helper->fb;
int depth;

if (var->pixclock != 0 || in_dbg_master())
return -EINVAL;
Expand All @@ -1610,72 +1628,15 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
return -EINVAL;
}

switch (var->bits_per_pixel) {
case 16:
depth = (var->green.length == 6) ? 16 : 15;
break;
case 32:
depth = (var->transp.length > 0) ? 32 : 24;
break;
default:
depth = var->bits_per_pixel;
break;
}

switch (depth) {
case 8:
var->red.offset = 0;
var->green.offset = 0;
var->blue.offset = 0;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 0;
var->transp.offset = 0;
break;
case 15:
var->red.offset = 10;
var->green.offset = 5;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 5;
var->blue.length = 5;
var->transp.length = 1;
var->transp.offset = 15;
break;
case 16:
var->red.offset = 11;
var->green.offset = 5;
var->blue.offset = 0;
var->red.length = 5;
var->green.length = 6;
var->blue.length = 5;
var->transp.length = 0;
var->transp.offset = 0;
break;
case 24:
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 0;
var->transp.offset = 0;
break;
case 32:
var->red.offset = 16;
var->green.offset = 8;
var->blue.offset = 0;
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
var->transp.length = 8;
var->transp.offset = 24;
break;
default:
/*
* drm fbdev emulation doesn't support changing the pixel format at all,
* so reject all pixel format changing requests.
*/
if (!drm_fb_pixel_format_equal(var, &info->var)) {
DRM_DEBUG("fbdev emulation doesn't support changing the pixel format\n");
return -EINVAL;
}

return 0;
}
EXPORT_SYMBOL(drm_fb_helper_check_var);
Expand Down
6 changes: 3 additions & 3 deletions include/drm/drm_edid.h
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Original file line number Diff line number Diff line change
Expand Up @@ -214,9 +214,9 @@ struct detailed_timing {
#define DRM_EDID_HDMI_DC_Y444 (1 << 3)

/* YCBCR 420 deep color modes */
#define DRM_EDID_YCBCR420_DC_48 (1 << 6)
#define DRM_EDID_YCBCR420_DC_36 (1 << 5)
#define DRM_EDID_YCBCR420_DC_30 (1 << 4)
#define DRM_EDID_YCBCR420_DC_48 (1 << 2)
#define DRM_EDID_YCBCR420_DC_36 (1 << 1)
#define DRM_EDID_YCBCR420_DC_30 (1 << 0)
#define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
DRM_EDID_YCBCR420_DC_36 | \
DRM_EDID_YCBCR420_DC_30)
Expand Down

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