diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index 978cb39a47a8239ce839f8478a9d87bfb08680a1..0d21402945ab3b33b730828ff7f638d0180f5a8f 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -45,19 +45,28 @@ config DRM_I915
config DRM_I915_ALPHA_SUPPORT
bool "Enable alpha quality support for new Intel hardware by default"
depends on DRM_I915
- default n
help
- Choose this option if you have new Intel hardware and want to enable
- the alpha quality i915 driver support for the hardware in this kernel
- version. You can also enable the support at runtime using the module
- parameter i915.alpha_support=1; this option changes the default for
- that module parameter.
+ This option is deprecated. Use DRM_I915_FORCE_PROBE option instead.
- It is recommended to upgrade to a kernel version with proper support
- as soon as it is available. Generally fixes for platforms with alpha
- support are not backported to older kernels.
+config DRM_I915_FORCE_PROBE
+ string "Force probe driver for selected new Intel hardware"
+ depends on DRM_I915
+ default "*" if DRM_I915_ALPHA_SUPPORT
+ help
+ This is the default value for the i915.force_probe module
+ parameter. Using the module parameter overrides this option.
- If in doubt, say "N".
+ Force probe the driver for new Intel graphics devices that are
+ recognized but not properly supported by this kernel version. It is
+ recommended to upgrade to a kernel version with proper support as soon
+ as it is available.
+
+ Use "" to disable force probe. If in doubt, use this.
+
+ Use "<pci-id>[,<pci-id>,...]" to force probe the driver for listed
+ devices. For example, "4500" or "4500,4571".
+
+ Use "*" to force probe the driver for all known devices.
config DRM_I915_CAPTURE_ERROR
bool "Enable capturing GPU state following a hang"
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 0dee503a5b68b2c8c9be1ff29a97390e108a24d8..8dcc30c1846a367adea6f13bde0b19a4e949e416 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2340,8 +2340,6 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
#define IS_ICL_WITH_PORT_F(dev_priv) \
IS_SUBPLATFORM(dev_priv, INTEL_ICELAKE, INTEL_SUBPLATFORM_PORTF)
-#define IS_ALPHA_SUPPORT(intel_info) ((intel_info)->is_alpha_support)
-
#define SKL_REVID_A0 0x0
#define SKL_REVID_B0 0x1
#define SKL_REVID_C0 0x2
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index b5be0abbba359e4372c458c57597bb67e574a172..5b07766a1c26ef7aa2c15f7548b22cdcf36c4d9f 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -87,9 +87,12 @@ i915_param_named_unsafe(enable_psr, int, 0600,
"(0=disabled, 1=enabled) "
"Default: -1 (use per-chip default)");
+i915_param_named_unsafe(force_probe, charp, 0400,
+ "Force probe the driver for specified devices. "
+ "See CONFIG_DRM_I915_FORCE_PROBE for details.");
+
i915_param_named_unsafe(alpha_support, bool, 0400,
- "Enable alpha quality driver support for latest hardware. "
- "See also CONFIG_DRM_I915_ALPHA_SUPPORT.");
+ "Deprecated. See i915.force_probe.");
i915_param_named_unsafe(disable_power_well, int, 0400,
"Disable display power wells when possible "
diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
index cf9d0be49a383bd80578c6adf5bade3578b18599..a4770ce46bd2407ada2b361e0efd242814000c9e 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -64,6 +64,7 @@ struct drm_printer;
param(int, reset, 2) \
param(unsigned int, inject_load_failure, 0) \
param(int, fastboot, -1) \
+ param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE) \
/* leave bools at the end to not create holes */ \
param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT)) \
param(bool, enable_hangcheck, true) \
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index fc66d7f348fc6c12dccbfda8346c60df6f1b99a3..e761ea86b4815969748bf0a7a706922f08b96e4e 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -760,7 +760,7 @@ static const struct intel_device_info intel_icelake_11_info = {
static const struct intel_device_info intel_elkhartlake_info = {
GEN11_FEATURES,
PLATFORM(INTEL_ELKHARTLAKE),
- .is_alpha_support = 1,
+ .require_force_probe = 1,
.engine_mask = BIT(RCS0) | BIT(BCS0) | BIT(VCS0),
.ppgtt_size = 36,
};
@@ -854,16 +854,57 @@ static void i915_pci_remove(struct pci_dev *pdev)
pci_set_drvdata(pdev, NULL);
}
+/* is device_id present in comma separated list of ids */
+static bool force_probe(u16 device_id, const char *devices)
+{
+ char *s, *p, *tok;
+ bool ret;
+
+ /* FIXME: transitional */
+ if (i915_modparams.alpha_support) {
+ DRM_INFO("i915.alpha_support is deprecated, use i915.force_probe=%04x instead\n",
+ device_id);
+ return true;
+ }
+
+ if (!devices || !*devices)
+ return false;
+
+ /* match everything */
+ if (strcmp(devices, "*") == 0)
+ return true;
+
+ s = kstrdup(devices, GFP_KERNEL);
+ if (!s)
+ return false;
+
+ for (p = s, ret = false; (tok = strsep(&p, ",")) != NULL; ) {
+ u16 val;
+
+ if (kstrtou16(tok, 16, &val) == 0 && val == device_id) {
+ ret = true;
+ break;
+ }
+ }
+
+ kfree(s);
+
+ return ret;
+}
+
static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct intel_device_info *intel_info =
(struct intel_device_info *) ent->driver_data;
int err;
- if (IS_ALPHA_SUPPORT(intel_info) && !i915_modparams.alpha_support) {
- DRM_INFO("The driver support for your hardware in this kernel version is alpha quality\n"
- "See CONFIG_DRM_I915_ALPHA_SUPPORT or i915.alpha_support module parameter\n"
- "to enable support in this kernel version, or check for kernel updates.\n");
+ if (intel_info->require_force_probe &&
+ !force_probe(pdev->device, i915_modparams.force_probe)) {
+ DRM_INFO("Your graphics device %04x is not properly supported by the driver in this\n"
+ "kernel version. To force driver probe anyway, use i915.force_probe=%04x\n"
+ "module parameter or CONFIG_DRM_I915_FORCE_PROBE=%04x configuration option,\n"
+ "or (recommended) check for kernel updates.\n",
+ pdev->device, pdev->device, pdev->device);
return -ENODEV;
}
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index 6412a9c72898c4afeb3e2908e41238c41ba207bb..d67dedf0cbd857348b7164f3ba8b2be732500221 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -105,7 +105,7 @@ enum intel_ppgtt_type {
#define DEV_INFO_FOR_EACH_FLAG(func) \
func(is_mobile); \
func(is_lp); \
- func(is_alpha_support); \
+ func(require_force_probe); \
/* Keep has_* in alphabetical order */ \
func(has_64bit_reloc); \
func(gpu_reset_clobbers_display); \