drm/i915: fix device info for devices without display

Commit 00c6cbfd4e8a ("drm/i915: move pipe_mask and cpu_transcoder_mask
to runtime info") moved the pipe_mask member from struct
intel_device_info to intel_runtime_info, but overlooked some of our
platforms initializing device info .display = {}. This is significant,
as pipe_mask is the single point of truth for a device having a display
or not; the platforms in question left pipe_mask to whatever was set for
the platforms they "inherit" from in the complex macro scheme we have.

Add new NO_DISPLAY macro initializing .__runtime.pipe_mask = 0, which
will cause the device info .display sub-struct to be zeroed in
intel_device_info_runtime_init(). A better solution (or simply audit of
proper use of HAS_DISPLAY() checks) is required before moving forward
with [1].

Also clear all the display related members in runtime info if there's no
display. The latter is a bit tedious, but it's for completeness at this
time, to ensure similar functionality as before.

[1] https://lore.kernel.org/r/dfda1bf67f02ceb07c280b7a13216405fd1f7a34.1660137416.git.jani.nikula@intel.com

Fixes: 00c6cbfd4e8a ("drm/i915: move pipe_mask and cpu_transcoder_mask to runtime info")
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Maarten Lankhort <maarten.lankhorst@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220916082642.3451961-1-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 6b56346..99624c7 100644 (file)
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -38,6 +38,8 @@
        .__runtime.media.ip.ver = (x), \
        .__runtime.display.ip.ver = (x)
 
+#define NO_DISPLAY .__runtime.pipe_mask = 0
+
 #define I845_PIPE_OFFSETS \
        .display.pipe_offsets = { \
                [TRANSCODER_A] = PIPE_A_OFFSET, \
@@ -516,9 +518,8 @@ static const struct intel_device_info ivb_m_gt2_info = {
 static const struct intel_device_info ivb_q_info = {
        GEN7_FEATURES,
        PLATFORM(INTEL_IVYBRIDGE),
+       NO_DISPLAY,
        .gt = 2,
-       .__runtime.pipe_mask = 0, /* legal, last one wins */
-       .__runtime.cpu_transcoder_mask = 0,
        .has_l3_dpf = 1,
 };
 
@@ -1036,7 +1037,7 @@ static const struct intel_device_info xehpsdv_info = {
        XE_HPM_FEATURES,
        DGFX_FEATURES,
        PLATFORM(INTEL_XEHPSDV),
-       .display = { },
+       NO_DISPLAY,
        .has_64k_pages = 1,
        .needs_compact_pt = 1,
        .has_media_ratio_mode = 1,
@@ -1078,7 +1079,7 @@ static const struct intel_device_info dg2_info = {
 
 static const struct intel_device_info ats_m_info = {
        DG2_FEATURES,
-       .display = { 0 },
+       NO_DISPLAY,
        .require_force_probe = 1,
 };
 
@@ -1099,7 +1100,7 @@ static const struct intel_device_info pvc_info = {
        .__runtime.graphics.ip.rel = 60,
        .__runtime.media.ip.rel = 60,
        PLATFORM(INTEL_PONTEVECCHIO),
-       .display = { 0 },
+       NO_DISPLAY,
        .has_flat_ccs = 0,
        .__runtime.platform_engine_mask =
                BIT(BCS0) |

diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index 2018eaa..908ec24 100644 (file)
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -498,8 +498,14 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv)
                dev_priv->drm.driver_features &= ~(DRIVER_MODESET |
                                                   DRIVER_ATOMIC);
                memset(&info->display, 0, sizeof(info->display));
+
+               runtime->cpu_transcoder_mask = 0;
                memset(runtime->num_sprites, 0, sizeof(runtime->num_sprites));
                memset(runtime->num_scalers, 0, sizeof(runtime->num_scalers));
+               runtime->fbc_mask = 0;
+               runtime->has_hdcp = false;
+               runtime->has_dmc = false;
+               runtime->has_dsc = false;
        }
 }