> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-boun...@lists.freedesktop.org] On Behalf
> Of Emily Deng
> Sent: Tuesday, August 09, 2016 9:45 PM
> To: amd-gfx@lists.freedesktop.org
> Cc: Deng, Emily
> Subject: [PATCH v4] drm/amdgpu: Change the virtual_display type from int
> to char*.
>
> Replace variable enable_virtual_display and change the type of
> enable_virtual_display.
>
> For virtual display feature, as there may be multiple GPUs,
> for user could choose whiche GPU need to enable this feature, change
> the type of virtual_display from int to char*. The variable will be set
> like this virtual_display="xxxx:xx:xx.x;xxxx:xx:xx.x;".
>
> Signed-off-by: Emily Deng <emily.d...@amd.com>
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 ++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 29
> ++++++++++++++++++++++++++++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 +++---
> drivers/gpu/drm/amd/amdgpu/cik.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/vi.c | 2 +-
> 5 files changed, 35 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index c309eaf..e9e3525 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -93,7 +93,7 @@ extern unsigned amdgpu_pcie_lane_cap;
> extern unsigned amdgpu_cg_mask;
> extern unsigned amdgpu_pg_mask;
> extern int amdgpu_sclk_deep_sleep_en;
> -extern int amdgpu_virtual_display;
> +extern char *amdgpu_virtual_display;
>
> #define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
> #define AMDGPU_MAX_USEC_TIMEOUT 100000 /* 100
> ms */
> @@ -2076,6 +2076,7 @@ struct amdgpu_device {
> atomic_t gpu_reset_counter;
>
> /* display */
> + bool enable_virtual_display;
> struct amdgpu_mode_info mode_info;
> /* For pre-DCE11. DCE11 and later are in "struct amdgpu_device-
> >dm" */
> struct work_struct hotplug_work;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 68cce12..5376361 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -47,6 +47,7 @@
> #endif
> #include "vi.h"
> #include "bif/bif_4_1_d.h"
> +#include <linux/pci.h>
>
> static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev);
> static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev);
> @@ -1182,11 +1183,37 @@ int amdgpu_ip_block_version_cmp(struct
> amdgpu_device *adev,
> return 1;
> }
>
> +static void amdgpu_whether_enable_virtual_display(struct amdgpu_device
> *adev)
> +{
> + adev->enable_virtual_display = false;
> +
> + if (amdgpu_virtual_display) {
> + struct drm_device *ddev = adev->ddev;
> + const char *pci_address_name = pci_name(ddev->pdev);
> + char *pciaddstr, *pciaddstr_tmp, *pciaddname;
> +
> + pciaddstr = kstrdup(amdgpu_virtual_display, GFP_KERNEL);
> + pciaddstr_tmp = pciaddstr;
> + while ((pciaddname = strsep(&pciaddstr_tmp, ";"))) {
> + if (!strcmp(pci_address_name, pciaddname)) {
> + adev->enable_virtual_display = true;
> + break;
> + }
> + }
> +
> + DRM_INFO("virtual display string:%s,
> %s:virtual_display:%d\n",
> + amdgpu_virtual_display, pci_address_name,
> + adev->enable_virtual_display);
> +
> + kfree(pciaddstr);
> + }
> +}
> +
> static int amdgpu_early_init(struct amdgpu_device *adev)
> {
> int i, r;
>
> - DRM_INFO("virtual display enabled:%d\n", amdgpu_virtual_display);
> + amdgpu_whether_enable_virtual_display(adev);
>
> switch (adev->asic_type) {
> case CHIP_TOPAZ:
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 7007cf7..209a539 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -90,7 +90,7 @@ unsigned amdgpu_pcie_gen_cap = 0;
> unsigned amdgpu_pcie_lane_cap = 0;
> unsigned amdgpu_cg_mask = 0xffffffff;
> unsigned amdgpu_pg_mask = 0xffffffff;
> -int amdgpu_virtual_display = 0;
> +char *amdgpu_virtual_display = NULL;
>
> MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing, in
> megabytes");
> module_param_named(vramlimit, amdgpu_vram_limit, int, 0600);
> @@ -190,8 +190,8 @@ module_param_named(cg_mask, amdgpu_cg_mask,
> uint, 0444);
> MODULE_PARM_DESC(pg_mask, "Powergating flags mask (0 = disable
> power gating)");
> module_param_named(pg_mask, amdgpu_pg_mask, uint, 0444);
>
> -MODULE_PARM_DESC(virtual_display, "enable virtual display (0 = disable
> virtual display)");
> -module_param_named(virtual_display, amdgpu_virtual_display, int, 0444);
> +MODULE_PARM_DESC(virtual_display, "Enable virtual display feature (the
> virtual_display will be set like xxxx:xx:xx.x;xxxx:xx:xx.x)");
> +module_param_named(virtual_display, amdgpu_virtual_display, charp,
> 0444);
>
> static const struct pci_device_id pciidlist[] = {
> #ifdef CONFIG_DRM_AMDGPU_CIK
> diff --git a/drivers/gpu/drm/amd/amdgpu/cik.c
> b/drivers/gpu/drm/amd/amdgpu/cik.c
> index 84caa3f..a9fc2bb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/cik.c
> +++ b/drivers/gpu/drm/amd/amdgpu/cik.c
> @@ -2464,7 +2464,7 @@ static const struct amdgpu_ip_block_version
> kaveri_ip_blocks_vd[] =
>
> int cik_set_ip_blocks(struct amdgpu_device *adev)
> {
> - if (amdgpu_virtual_display) {
> + if (adev->enable_virtual_display) {
> amdgpu_dal = 0;
> switch (adev->asic_type) {
> case CHIP_BONAIRE:
> diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c
> b/drivers/gpu/drm/amd/amdgpu/vi.c
> index 224e8a0..b9da2c7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/vi.c
> +++ b/drivers/gpu/drm/amd/amdgpu/vi.c
> @@ -1730,7 +1730,7 @@ static const struct amdgpu_ip_block_version
> fiji_ip_blocks_dal[] =
>
> int vi_set_ip_blocks(struct amdgpu_device *adev)
> {
> - if (amdgpu_virtual_display) {
> + if (adev->enable_virtual_display) {
> amdgpu_dal = 0;
> switch (adev->asic_type) {
> case CHIP_TOPAZ:
> --
> 1.9.1
>
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