[PATCH 5.10 167/462] m68k: vga: Fix I/O defines

[PATCH 5.10 167/462] m68k: vga: Fix I/O defines

[Greg Kroah-Hartman]

5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Zimmermann <tzimmermann@suse.de>

commit 53036937a101b5faeaf98e7438555fa854a1a844 upstream.

Including m68k's <asm/raw_io.h> in vga.h on nommu platforms results
in conflicting defines with io_no.h for various I/O macros from the
__raw_read and __raw_write families. An example error is

   In file included from arch/m68k/include/asm/vga.h:12,
                 from include/video/vga.h:22,
                 from include/linux/vgaarb.h:34,
		 from drivers/video/aperture.c:12:
>> arch/m68k/include/asm/raw_io.h:39: warning: "__raw_readb" redefined
      39 | #define __raw_readb in_8
	 |
   In file included from arch/m68k/include/asm/io.h:6,
		    from include/linux/io.h:13,
		    from include/linux/irq.h:20,
		    from include/asm-generic/hardirq.h:17,
		    from ./arch/m68k/include/generated/asm/hardirq.h:1,
		    from include/linux/hardirq.h:11,
		    from include/linux/interrupt.h:11,
                    from include/linux/trace_recursion.h:5,
		    from include/linux/ftrace.h:10,
		    from include/linux/kprobes.h:28,
		    from include/linux/kgdb.h:19,
		    from include/linux/fb.h:6,
		    from drivers/video/aperture.c:5:
   arch/m68k/include/asm/io_no.h:16: note: this is the location of the previous definition
      16 | #define __raw_readb(addr) \
	 |

Include <asm/io.h>, which avoids raw_io.h on nommu platforms.
Also change the defined values of some of the read/write symbols in
vga.h to __raw_read/__raw_write as the raw_in/raw_out symbols are not
generally available.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202501071629.DNEswlm8-lkp@intel.com/
Fixes: 5c3f968712ce ("m68k/video: Create <asm/vga.h>")
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-fbdev@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v3.5+
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/20250107095912.130530-1-tzimmermann@suse.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/m68k/include/asm/vga.h |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/arch/m68k/include/asm/vga.h
+++ b/arch/m68k/include/asm/vga.h
@@ -9,7 +9,7 @@
  */
 #ifndef CONFIG_PCI
 
-#include <asm/raw_io.h>
+#include <asm/io.h>
 #include <asm/kmap.h>
 
 /*
@@ -29,9 +29,9 @@
 #define inw_p(port)		0
 #define outb_p(port, val)	do { } while (0)
 #define outw(port, val)		do { } while (0)
-#define readb			raw_inb
-#define writeb			raw_outb
-#define writew			raw_outw
+#define readb			__raw_readb
+#define writeb			__raw_writeb
+#define writew			__raw_writew
 
 #endif /* CONFIG_PCI */
 #endif /* _ASM_M68K_VGA_H */

[PATCH 5.10 321/462] drm/rockchip: cdn-dp: Use drm_connector_helper_hpd_irq_event()

[Greg Kroah-Hartman]

5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Zimmermann <tzimmermann@suse.de>

[ Upstream commit 666e1960464140cc4bc9203c203097e70b54c95a ]

The code for detecting and updating the connector status in
cdn_dp_pd_event_work() has a number of problems.

- It does not aquire the locks to call the detect helper and update
the connector status. These are struct drm_mode_config.connection_mutex
and struct drm_mode_config.mutex.

- It does not use drm_helper_probe_detect(), which helps with the
details of locking and detection.

- It uses the connector's status field to determine a change to
the connector status. The epoch_counter field is the correct one. The
field signals a change even if the connector status' value did not
change.

Replace the code with a call to drm_connector_helper_hpd_irq_event(),
which fixes all these problems.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 81632df69772 ("drm/rockchip: cdn-dp: do not use drm_helper_hpd_irq_event")
Cc: Chris Zhong <zyw@rock-chips.com>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Sandy Huang <hjc@rock-chips.com>
Cc: "Heiko Stübner" <heiko@sntech.de>
Cc: Andy Yan <andy.yan@rock-chips.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: <stable@vger.kernel.org> # v4.11+
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20241105133848.480407-1-tzimmermann@suse.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/rockchip/cdn-dp-core.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index 53cad1003ad77..a36646e234aec 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -915,9 +915,6 @@ static void cdn_dp_pd_event_work(struct work_struct *work)
 {
 	struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
 						event_work);
-	struct drm_connector *connector = &dp->connector;
-	enum drm_connector_status old_status;
-
 	int ret;
 
 	mutex_lock(&dp->lock);
@@ -979,11 +976,7 @@ static void cdn_dp_pd_event_work(struct work_struct *work)
 
 out:
 	mutex_unlock(&dp->lock);
-
-	old_status = connector->status;
-	connector->status = connector->funcs->detect(connector, false);
-	if (old_status != connector->status)
-		drm_kms_helper_hotplug_event(dp->drm_dev);
+	drm_connector_helper_hpd_irq_event(&dp->connector);
 }
 
 static int cdn_dp_pd_event(struct notifier_block *nb,
-- 
2.39.5