linux.git/drivers/gpu/drm/v3d/v3d_power.c, branch master Linux kernel source tree drm/v3d: Clean caches before runtime suspend 2026-06-01T21:40:55+00:00 Maíra Canal mcanal@igalia.com 2026-05-30T18:37:44+00:00 b81e8b02e8f26b13ff4d6410f7a9854ba7021b86 On runtime suspend, clean the V3D caches before suspending so all dirty lines are written back to memory before the power domain is shut down. Fixes several system hangs reported in [1][2][3]. Closes: https://github.com/raspberrypi/linux/issues/7381 [1] Closes: https://github.com/raspberrypi/linux/issues/7396 [2] Closes: https://github.com/raspberrypi/linux/issues/7397 [3] Fixes: 458f2a712ab4 ("drm/v3d: Introduce Runtime Power Management") Link: https://patch.msgid.link/20260530-v3d-fix-rpi4-freezes-v1-3-c2c8307da6ce@igalia.com Signed-off-by: Maíra Canal <mcanal@igalia.com> Reviewed-by: Iago Toral Quiroga <itoral@igalia.com> 
On runtime suspend, clean the V3D caches before suspending so all dirty
lines are written back to memory before the power domain is shut down.

Fixes several system hangs reported in [1][2][3].

Closes: https://github.com/raspberrypi/linux/issues/7381 [1]
Closes: https://github.com/raspberrypi/linux/issues/7396 [2]
Closes: https://github.com/raspberrypi/linux/issues/7397 [3]
Fixes: 458f2a712ab4 ("drm/v3d: Introduce Runtime Power Management")
Link: https://patch.msgid.link/20260530-v3d-fix-rpi4-freezes-v1-3-c2c8307da6ce@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
drm/v3d: Introduce Runtime Power Management 2026-04-04T10:41:08+00:00 Maíra Canal mcanal@igalia.com 2026-03-31T12:35:53+00:00 458f2a712ab42b7d3615208862922dc35fe90ef9 Commit 90a64adb0876 ("drm/v3d: Get rid of pm code") removed the last bits of power management code that V3D had, which were actually never hooked. Therefore, currently, the GPU clock is enabled during probe and only disabled when removing the driver. Implement proper power management using the kernel's Runtime PM framework. Reviewed-by: Melissa Wen <mwen@igalia.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Link: https://patch.msgid.link/20260331-v3d-power-management-v9-3-f52ff87bfd36@igalia.com Signed-off-by: Maíra Canal <mcanal@igalia.com> 
Commit 90a64adb0876 ("drm/v3d: Get rid of pm code") removed the last
bits of power management code that V3D had, which were actually never
hooked. Therefore, currently, the GPU clock is enabled during probe
and only disabled when removing the driver.

Implement proper power management using the kernel's Runtime PM
framework.

Reviewed-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20260331-v3d-power-management-v9-3-f52ff87bfd36@igalia.com
Signed-off-by: Maíra Canal <mcanal@igalia.com>