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commit 7555c5d5a87973fbdee201ff63d2edd748933177
parent eb6d938ffa486dd89331cbfa2137038df6c912d2
Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date:   Fri, 19 Oct 2018 08:31:22 +0200

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

Diffstat:
Mdrivers/gpu/drm/drm_crtc.c | 10+++++++---
Mdrivers/gpu/drm/drm_edid.c | 5++++-
Mdrivers/gpu/drm/drm_fb_helper.c | 91+++++++++++++++++++++++--------------------------------------------------------
Minclude/drm/drm_edid.h | 6+++---
4 files changed, 40 insertions(+), 72 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c @@ -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; @@ -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; diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c @@ -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 }, @@ -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, diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c @@ -1580,6 +1580,25 @@ unlock: } 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 @@ -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; @@ -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); diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h @@ -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)