From: Timur Kristóf Date: Fri, 14 Nov 2025 12:07:36 +0000 (+0100) Subject: drm/amdgpu: Use amdgpu by default on SI dedicated GPUs (v2) X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ccd3b4c7c37fbbd3e5244d3c54ca24ae0a37810d;p=thirdparty%2Fkernel%2Flinux.git drm/amdgpu: Use amdgpu by default on SI dedicated GPUs (v2) Now that the DC analog connector support and VCE1 support landed, amdgpu is at feature parity with the old radeon driver on SI dGPUs. Enabling the amdgpu driver by default for SI dGPUs has the following benefits: - More stable OpenGL support through RadeonSI - Vulkan support through RADV - Improved performance - Better display features through DC Users who want to keep using the old driver can do so using: amdgpu.si_support=0 radeon.si_support=1 v2: - Update documentation in Kconfig file Reviewed-by: Christian König Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig index 883f324288713..7f515be5185dc 100644 --- a/drivers/gpu/drm/amd/amdgpu/Kconfig +++ b/drivers/gpu/drm/amd/amdgpu/Kconfig @@ -43,14 +43,16 @@ config DRM_AMDGPU_SI bool "Enable amdgpu support for SI parts" depends on DRM_AMDGPU help - Choose this option if you want to enable experimental support + Choose this option if you want to enable support for SI (Southern Islands) asics. - SI is already supported in radeon. Experimental support for SI - in amdgpu will be disabled by default and is still provided by - radeon. Use module options to override this: + SI (Southern Islands) are first generation GCN GPUs, + supported by both drivers: radeon (old) and amdgpu (new). + By default, SI dedicated GPUs are supported by amdgpu. - radeon.si_support=0 amdgpu.si_support=1 + Use module options to override this: + To use radeon for SI, + radeon.si_support=1 amdgpu.si_support=0 config DRM_AMDGPU_CIK bool "Enable amdgpu support for CIK parts" diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 09d3b080a4daa..2dfbddcef9ab3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -623,7 +623,7 @@ module_param_named(timeout_period, amdgpu_watchdog_timer.period, uint, 0644); * SI (Southern Islands) are first generation GCN GPUs, supported by both * drivers: radeon (old) and amdgpu (new). This parameter controls whether * amdgpu should support SI. - * By default, SI chips are supported by radeon (except when radeon is not built). + * By default, SI dedicated GPUs are supported by amdgpu. * Only relevant when CONFIG_DRM_AMDGPU_SI is enabled to build SI support in amdgpu. * See also radeon.si_support which should be disabled when amdgpu.si_support is * enabled, and vice versa. @@ -2326,6 +2326,7 @@ static bool amdgpu_support_enabled(struct device *dev, param = "si_support"; module_param = amdgpu_si_support; amdgpu_support_built = IS_ENABLED(CONFIG_DRM_AMDGPU_SI); + support_by_default = true; break; case CHIP_BONAIRE: diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 440145fed6253..87fd6255c1141 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -273,6 +273,7 @@ static bool radeon_support_enabled(struct device *dev, gen = "SI"; module_param = radeon_si_support; amdgpu_support_built &= IS_ENABLED(CONFIG_DRM_AMDGPU_SI); + support_by_default = false; break; case CHIP_BONAIRE: