There are a couple places in our driver that loop over transcoders A..D
for gen11+; since RKL only has three pipes/transcoders, this can lead to
unclaimed register reads/writes. We should add checks for transcoder
existence where appropriate.
v2: Move one transcoder check that wound up in the wrong function after
conflict resolution. It belongs in bdw_get_trans_port_sync_config
rather than bxt_get_dsi_transcoder_state.
v3: Switch loops to use for_each_cpu_transcoder_masked() since this
iterator already checks the platform's transcoder mask for us.
(Ville)
Cc: Aditya Swarup <aditya.swarup@xxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_irq.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index f3ea81a17352..40a71c4a1ef5 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2885,13 +2885,15 @@ static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
{
struct intel_uncore *uncore = &dev_priv->uncore;
enum pipe pipe;
+ u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
+ BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
intel_uncore_write(uncore, GEN11_DISPLAY_INT_CTL, 0);
if (INTEL_GEN(dev_priv) >= 12) {
enum transcoder trans;
- for (trans = TRANSCODER_A; trans <= TRANSCODER_D; trans++) {
+ for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
enum intel_display_power_domain domain;
domain = POWER_DOMAIN_TRANSCODER(trans);
@@ -3413,6 +3415,8 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
u32 de_port_masked = gen8_de_port_aux_mask(dev_priv);
u32 de_port_enables;
u32 de_misc_masked = GEN8_DE_EDP_PSR;
+ u32 trans_mask = BIT(TRANSCODER_A) | BIT(TRANSCODER_B) |
+ BIT(TRANSCODER_C) | BIT(TRANSCODER_D);
enum pipe pipe;
if (INTEL_GEN(dev_priv) <= 10)
@@ -3433,7 +3437,7 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
if (INTEL_GEN(dev_priv) >= 12) {
enum transcoder trans;
- for (trans = TRANSCODER_A; trans <= TRANSCODER_D; trans++) {
+ for_each_cpu_transcoder_masked(dev_priv, trans, trans_mask) {
enum intel_display_power_domain domain;
domain = POWER_DOMAIN_TRANSCODER(trans);
--
2.24.1
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