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RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+] X-Spam-Flag: NO Am 10.09.26 um 21:25 schrieb Roshan Kumar: > The PL110/PL111 controller scans out a single framebuffer and never > blends its alpha channel with anything. In every pixel-format table > each alpha-carrying entry (ARGB/ABGR in 8888, 1555 and 4444) maps to > exactly the same register configuration as its XRGB/XBGR counterpart, > so the alpha byte was never used by the hardware. > > Commit 860e748bddcc ("drm: ensure blend mode supported if pixel format > with alpha exposed") added validation that warns when a plane exposes > alpha formats without a pixel blend mode property, and PL111 does exactly > that. With panic_on_warn enabled the warning prevents the syzkaller > vexpress-a15 manager from booting. > > Drivers should not report formats they do not support, so remove the > alpha formats from all variant tables: the generic PL110, PL111 and > Nomadik tables in pl111_drv.c and the board-specific Integrator, IM-PD1, > Versatile and RealView/Versatile-Express tables in pl111_versatile.c, > plus the now dead case labels in the display setup and the Versatile > syscon connector switch, instead of advertising a blend mode property. > Behavior is unchanged for userspace that picks an XRGB/XBGR/RGB format; > alpha-picking clients fall back to the identical X variant. > > Link: https://github.com/google/syzkaller/issues/7805 > Fixes: 860e748bddcc ("drm: ensure blend mode supported if pixel format with alpha exposed") > Signed-off-by: Roshan Kumar The tags always go last, but we can fix this when we merge the patch. Thanks for fixing the issue. Reviewed-by: Thomas Zimmermann > > Changes in v2: drop the alpha formats entirely instead of advertising a > DRM_MODE_BLEND_PIXEL_NONE property, per review feedback from Thomas > Zimmermann. Leandro's Reviewed-by from v1 is not carried as the > approach changed. > > Changes in v3: v2 missed the board-specific variant tables in > pl111_versatile.c (Integrator, IM-PD1, Versatile, RealView and > Versatile Express), which still exposed alpha formats and would fall > through to the WARN_ONCE default in pl111_display_enable() on those > boards. Pointed out by the sashiko AI reviewer. > --- > drivers/gpu/drm/pl111/pl111_display.c | 6 ------ > drivers/gpu/drm/pl111/pl111_drv.c | 16 ---------------- > drivers/gpu/drm/pl111/pl111_versatile.c | 18 ------------------ > 3 files changed, 40 deletions(-) > > diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c > index 5d10bc5fdf1f..e1b513d36c27 100644 > --- a/drivers/gpu/drm/pl111/pl111_display.c > +++ b/drivers/gpu/drm/pl111/pl111_display.c > @@ -267,14 +267,12 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, > if (priv->variant->st_bitmux_control) > cntl |= CNTL_ST_LCDBPP24_PACKED; > break; > - case DRM_FORMAT_ABGR8888: > case DRM_FORMAT_XBGR8888: > if (priv->variant->st_bitmux_control) > cntl |= CNTL_LCDBPP24 | CNTL_BGR; > else > cntl |= CNTL_LCDBPP24; > break; > - case DRM_FORMAT_ARGB8888: > case DRM_FORMAT_XRGB8888: > if (priv->variant->st_bitmux_control) > cntl |= CNTL_LCDBPP24; > @@ -297,13 +295,11 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, > else > cntl |= CNTL_LCDBPP16_565 | CNTL_BGR; > break; > - case DRM_FORMAT_ABGR1555: > case DRM_FORMAT_XBGR1555: > cntl |= CNTL_LCDBPP16; > if (priv->variant->st_bitmux_control) > cntl |= CNTL_ST_1XBPP_5551 | CNTL_BGR; > break; > - case DRM_FORMAT_ARGB1555: > case DRM_FORMAT_XRGB1555: > cntl |= CNTL_LCDBPP16; > if (priv->variant->st_bitmux_control) > @@ -311,13 +307,11 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, > else > cntl |= CNTL_BGR; > break; > - case DRM_FORMAT_ABGR4444: > case DRM_FORMAT_XBGR4444: > cntl |= CNTL_LCDBPP16_444; > if (priv->variant->st_bitmux_control) > cntl |= CNTL_ST_1XBPP_444 | CNTL_BGR; > break; > - case DRM_FORMAT_ARGB4444: > case DRM_FORMAT_XRGB4444: > cntl |= CNTL_LCDBPP16_444; > if (priv->variant->st_bitmux_control) > diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c > index ac7b1d12a0f5..2175ac953795 100644 > --- a/drivers/gpu/drm/pl111/pl111_drv.c > +++ b/drivers/gpu/drm/pl111/pl111_drv.c > @@ -341,13 +341,9 @@ static void pl111_amba_shutdown(struct amba_device *amba_dev) > * This early variant lacks the 565 and 444 pixel formats. > */ > static const u32 pl110_pixel_formats[] = { > - DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > - DRM_FORMAT_ARGB8888, > DRM_FORMAT_XRGB8888, > - DRM_FORMAT_ABGR1555, > DRM_FORMAT_XBGR1555, > - DRM_FORMAT_ARGB1555, > DRM_FORMAT_XRGB1555, > }; > > @@ -361,19 +357,13 @@ static const struct pl111_variant_data pl110_variant = { > > /* RealView, Versatile Express etc use this modern variant */ > static const u32 pl111_pixel_formats[] = { > - DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > - DRM_FORMAT_ARGB8888, > DRM_FORMAT_XRGB8888, > DRM_FORMAT_BGR565, > DRM_FORMAT_RGB565, > - DRM_FORMAT_ABGR1555, > DRM_FORMAT_XBGR1555, > - DRM_FORMAT_ARGB1555, > DRM_FORMAT_XRGB1555, > - DRM_FORMAT_ABGR4444, > DRM_FORMAT_XBGR4444, > - DRM_FORMAT_ARGB4444, > DRM_FORMAT_XRGB4444, > }; > > @@ -387,19 +377,13 @@ static const struct pl111_variant_data pl111_variant = { > static const u32 pl110_nomadik_pixel_formats[] = { > DRM_FORMAT_RGB888, > DRM_FORMAT_BGR888, > - DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > - DRM_FORMAT_ARGB8888, > DRM_FORMAT_XRGB8888, > DRM_FORMAT_BGR565, > DRM_FORMAT_RGB565, > - DRM_FORMAT_ABGR1555, > DRM_FORMAT_XBGR1555, > - DRM_FORMAT_ARGB1555, > DRM_FORMAT_XRGB1555, > - DRM_FORMAT_ABGR4444, > DRM_FORMAT_XBGR4444, > - DRM_FORMAT_ARGB4444, > DRM_FORMAT_XRGB4444, > }; > > diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c > index 0d8331a3909f..9a60f10231b1 100644 > --- a/drivers/gpu/drm/pl111/pl111_versatile.c > +++ b/drivers/gpu/drm/pl111/pl111_versatile.c > @@ -209,9 +209,7 @@ static void pl111_versatile_enable(struct drm_device *drm, u32 format) > drm_info(drm, "enable Versatile CLCD connectors\n"); > > switch (format) { > - case DRM_FORMAT_ABGR8888: > case DRM_FORMAT_XBGR8888: > - case DRM_FORMAT_ARGB8888: > case DRM_FORMAT_XRGB8888: > val |= SYS_CLCD_MODE_888; > break; > @@ -221,9 +219,7 @@ static void pl111_versatile_enable(struct drm_device *drm, u32 format) > case DRM_FORMAT_RGB565: > val |= SYS_CLCD_MODE_565_B_LSB; > break; > - case DRM_FORMAT_ABGR1555: > case DRM_FORMAT_XBGR1555: > - case DRM_FORMAT_ARGB1555: > case DRM_FORMAT_XRGB1555: > val |= SYS_CLCD_MODE_5551; > break; > @@ -266,44 +262,30 @@ static void pl111_realview_clcd_enable(struct drm_device *drm, u32 format) > > /* PL110 pixel formats for Integrator, vanilla PL110 */ > static const u32 pl110_integrator_pixel_formats[] = { > - DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > - DRM_FORMAT_ARGB8888, > DRM_FORMAT_XRGB8888, > - DRM_FORMAT_ABGR1555, > DRM_FORMAT_XBGR1555, > - DRM_FORMAT_ARGB1555, > DRM_FORMAT_XRGB1555, > }; > > /* Extended PL110 pixel formats for Integrator and Versatile */ > static const u32 pl110_versatile_pixel_formats[] = { > - DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > - DRM_FORMAT_ARGB8888, > DRM_FORMAT_XRGB8888, > DRM_FORMAT_BGR565, /* Uses external PLD */ > DRM_FORMAT_RGB565, /* Uses external PLD */ > - DRM_FORMAT_ABGR1555, > DRM_FORMAT_XBGR1555, > - DRM_FORMAT_ARGB1555, > DRM_FORMAT_XRGB1555, > }; > > static const u32 pl111_realview_pixel_formats[] = { > - DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > - DRM_FORMAT_ARGB8888, > DRM_FORMAT_XRGB8888, > DRM_FORMAT_BGR565, > DRM_FORMAT_RGB565, > - DRM_FORMAT_ABGR1555, > DRM_FORMAT_XBGR1555, > - DRM_FORMAT_ARGB1555, > DRM_FORMAT_XRGB1555, > - DRM_FORMAT_ABGR4444, > DRM_FORMAT_XBGR4444, > - DRM_FORMAT_ARGB4444, > DRM_FORMAT_XRGB4444, > }; > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com GF: Jochen Jaser, Andrew McDonald, (HRB 36809, AG Nürnberg)