linux-kernel - [PATCH v3 2/3] drm/i915/display: Add function quirk_renderclear

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Date:   Sun,  1 Nov 2020 10:41:31 -0700
From:   rwright@....com
To:     jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, airlied@...ux.ie, daniel@...ll.ch,
        sumit.semwal@...aro.org, christian.koenig@....com,
        hdegoede@...hat.com, wambui.karugax@...il.com,
        chris@...is-wilson.co.uk, matthew.auld@...el.com,
        akeem.g.abodunrin@...el.com, prathap.kumar.valsan@...el.com,
        mika.kuoppala@...ux.intel.com, rwright@....com
Cc:     intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: [PATCH v3 2/3] drm/i915/display: Add function quirk_renderclear_reduced

From: Randy Wright <rwright@....com>

Added function quirk_renderclear_reduced to set QUIRK_RENDERCLEAR_REDUCED
for designated platforms.  Applying QUIRK_RENDERCLEAR_REDUCED for
the HP Pavilion Mini 300-020 prevents a GPU hang.

Signed-off-by: Randy Wright <rwright@....com>
---
 drivers/gpu/drm/i915/display/intel_quirks.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
index 46beb155d835..630b984ba49c 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.c
+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
@@ -53,6 +53,16 @@ static void quirk_increase_ddi_disabled_time(struct drm_i915_private *i915)
 	drm_info(&i915->drm, "Applying Increase DDI Disabled quirk\n");
 }
 
+/*
+ * Force use of smaller batch size in gen7_renderclear.c
+ * Needed on (at least) HP Pavilion Mini 300-020 to avoid GPU hang.
+ */
+static void quirk_renderclear_reduced(struct drm_i915_private *i915)
+{
+	i915->quirks |= QUIRK_RENDERCLEAR_REDUCED;
+	drm_info(&i915->drm, "Applying Renderclear Reduced quirk\n");
+}
+
 struct intel_quirk {
 	int device;
 	int subsystem_vendor;
@@ -141,6 +151,9 @@ static struct intel_quirk intel_quirks[] = {
 	/* HP Chromebook 14 (Celeron 2955U) */
 	{ 0x0a06, 0x103c, 0x21ed, quirk_backlight_present },
 
+	/* HP Mini 300-020 */
+	{ 0x0a06, 0x103c, 0x2b38, quirk_renderclear_reduced },
+
 	/* Dell Chromebook 11 */
 	{ 0x0a06, 0x1028, 0x0a35, quirk_backlight_present },
 
-- 
2.25.1