• Oscar Mateo's avatar
    drm/i915/bdw: Interrupts with logical rings · 73d477f6
    Oscar Mateo authored
    We need to attend context switch interrupts from all rings. Also, fixed writing
    IMR/IER and added HWSTAM at ring init time.
    
    Notice that, if added to irq_enable_mask, the context switch interrupts would
    be incorrectly masked out when the user interrupts are due to no users waiting
    on a sequence number. Therefore, this commit adds a bitmask of interrupts to
    be kept unmasked at all times.
    
    v2: Disable HWSTAM, as suggested by Damien (nobody listens to these interrupts,
    anyway).
    
    v3: Add new get/put_irq functions.
    
    Signed-off-by: Thomas Daniel <thomas.daniel@intel.com> (v1)
    Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> (v2 & v3)
    Reviewed-by: default avatarDamien Lespiau <damien.lespiau@intel.com>
    [danvet: Drop the GEN8_ prefix from the context switch interrupt
    define and move it to its brethren.]
    Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    73d477f6
i915_irq.c 135 KB