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drm/i915: Iterate over pipes and skip the disabled one 

It should not be assumed that a disabled display pipe will be
always last the pipe.
for_each_pipe() should iterate over I915_MAX_PIPES and check
for the disabled pipe and skip that pipe so that it should not
initialize the intel crtc for any disabled pipes.

Due to changes in for_each_pipe() macro, it requires to handle
the below compilation error.
"suggest explicit braces to avoid ambiguous ‘else’
[-Werror=dangling-else]"

v2:
- Cosmetic changes, removed unwanted parentheses. [Ville]

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200224124004.26712-2-anshuman.gupta@intel.com
This commit is contained in:
Anshuman Gupta 2020-02-24 18:09:58 +05:30 committed by Ville Syrjälä
parent 80f286a552
commit b8b65ccda5
2 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/i915/display/intel_display.h
View File

@ -313,10 +313,11 @@ enum phy_fia {
};
#define for_each_pipe(__dev_priv, __p) \
for ((__p) = 0; (__p) < INTEL_NUM_PIPES(__dev_priv); (__p)++)
for ((__p) = 0; (__p) < I915_MAX_PIPES; (__p)++) \
for_each_if(INTEL_INFO(__dev_priv)->pipe_mask & BIT(__p))
#define for_each_pipe_masked(__dev_priv, __p, __mask) \
for ((__p) = 0; (__p) < INTEL_NUM_PIPES(__dev_priv); (__p)++) \
for_each_pipe(__dev_priv, __p) \
for_each_if((__mask) & BIT(__p))
#define for_each_cpu_transcoder_masked(__dev_priv, __t, __mask) \

6
drivers/gpu/drm/i915/i915_irq.c
View File

@ -1739,11 +1739,12 @@ static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
if (pch_iir & SDE_POISON)
drm_err(&dev_priv->drm, "PCH poison interrupt\n");
if (pch_iir & SDE_FDI_MASK)
if (pch_iir & SDE_FDI_MASK) {
for_each_pipe(dev_priv, pipe)
drm_dbg(&dev_priv->drm, " pipe %c FDI IIR: 0x%08x\n",
pipe_name(pipe),
I915_READ(FDI_RX_IIR(pipe)));
}
if (pch_iir & (SDE_TRANSB_CRC_DONE | SDE_TRANSA_CRC_DONE))
drm_dbg(&dev_priv->drm, "PCH transcoder CRC done interrupt\n");
@ -1823,11 +1824,12 @@ static void cpt_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
if (pch_iir & SDE_AUDIO_CP_CHG_CPT)
drm_dbg(&dev_priv->drm, "Audio CP change interrupt\n");
if (pch_iir & SDE_FDI_MASK_CPT)
if (pch_iir & SDE_FDI_MASK_CPT) {
for_each_pipe(dev_priv, pipe)
drm_dbg(&dev_priv->drm, " pipe %c FDI IIR: 0x%08x\n",
pipe_name(pipe),
I915_READ(FDI_RX_IIR(pipe)));
}
if (pch_iir & SDE_ERROR_CPT)
cpt_serr_int_handler(dev_priv);