Re: [PATCH v6 00/24] Associate ddc adapters with connectors
On Tue, Jul 30, 2019 at 04:01:23PM +0100, Emil Velikov wrote: > On 2019/07/26, Andrzej Pietrasiewicz wrote: > > It is difficult for a user to know which of the i2c adapters is for which > > drm connector. This series addresses this problem. > > > > The idea is to have a symbolic link in connector's sysfs directory, e.g.: > > > > ls -l /sys/class/drm/card0-HDMI-A-1/ddc > > lrwxrwxrwx 1 root root 0 Jun 24 10:42 /sys/class/drm/card0-HDMI-A-1/ddc \ > > -> ../../../../soc/1388.i2c/i2c-2 > > > > The user then knows that their card0-HDMI-A-1 uses i2c-2 and can e.g. run > > ddcutil: > > > > ddcutil -b 2 getvcp 0x10 > > VCP code 0x10 (Brightness): current value =90, max value = 100 > > > > The first patch in the series adds struct i2c_adapter pointer to struct > > drm_connector. If the field is used by a particular driver, then an > > appropriate symbolic link is created by the generic code, which is also > > added > > by this patch. > > > > Patch 2 adds a new variant of drm_connector_init(), see the changelog > > below. > > > > Patches 3..24 are examples of how to convert a driver to this new scheme. > > > > v1..v2: > > > > - used fixed name "ddc" for the symbolic link in order to make it easy for > > userspace to find the i2c adapter > > > > v2..v3: > > > > - converted as many drivers as possible. > > > > v3..v4: > > > > - added Reviewed-by for patch 01/23 > > - moved "ddc" field assignment to before drm_connector_init() is called > > in msm, vc4, sti, mgag200, ast, amdgpu, radeon > > - simplified the code in amdgpu and radeon at the expense of some lines > > exceeding 80 characters as per Alex Deucher's suggestion > > - added i915 > > > > v4..v5: > > > > - changed "include " to "struct i2c_adapter;" > > in drm_connector.h, consequently, added "include " > > in drm_sysfs.c. > > - added "drm_connector_init_with_ddc()" variant to ensure that the ddc > > field of drm_connector is preserved accross its invocation > > - accordingly changed invocations of drm_connector_init() in the > > touched drivers to use the new variant > > > > v5..v6: > > > > - improved subject line of patch 1 > > - added kernel-doc for drm_connector_init_with_ddc() > > - improved kernel-doc for the ddc field of struct drm_connector > > - added Reviewed-by in patches 17 and 18 > > - added Acked-by in patch 2 > > - made the ownership of ddc i2c_adapter explicit in all patches, > > this made the affected patches much simpler > > > > @Benjamin > > @Shawn > > > > There were your Acked-by or Reviewed-by for some patches in v4, but now > > that the patches use the newly added function I'm not sure I can still > > include those tags without you actually confirming. Can I? Or can you > > please re-review? > > > > TODO: nouveau, gma500, omapdrm, panel-simple - if applicable. > > Other drivers are either already converted or don't mention neither > > "ddc" nor "i2c_adapter". > > > Another way to check is to look for drm_get_edid. Sadly that also > highlights aux. dp/mst instances, which expose the DDC in another way. > > For example comparing the diff stat wrt the following command shows > git grep -wc drm_get_edid -- drivers/gpu/drm/ There's also drm_do_get_edid, which points to the adv7511 bridge as a good candidate. > > > > .../gpu/drm/amd/amdgpu/amdgpu_connectors.c| 96 > drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c:1 > - as pointed out by Alex - mix of aux dp/mst and normal > > > drivers/gpu/drm/ast/ast_mode.c| 13 +- > > drivers/gpu/drm/bridge/analogix-anx78xx.c:1 > drivers/gpu/drm/bridge/analogix/analogix_dp_core.c:1 > - not applicable: aux dp/mst > > > > drivers/gpu/drm/bridge/dumb-vga-dac.c | 6 +- > > drivers/gpu/drm/bridge/sii902x.c:1 > - normal instance(?) that should be updated at some point. > > > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 6 +- > > drivers/gpu/drm/bridge/tc358767.c:1 > - not applicable: aux dp/mst > > > drivers/gpu/drm/bridge/ti-tfp410.c| 6 +- > > drivers/gpu/drm/drm_dp_mst_topology.c:3 > - not applicable: aux dp/mst > > > drivers/gpu/drm/drm_connector.c | 35 + > > drivers/gpu/drm/drm_sysfs.c | 8 + > > drivers/gpu/drm/drm_edid.c:7 > drivers/gpu/drm/drm_probe_helper.c:1 > - unrelated > > > drivers/gpu/drm/exynos/exynos_hdmi.c | 6 +- > > drivers/gpu/drm/gma500/cdv_intel_dp.c:3 > drivers/gpu/drm/gma500/cdv_intel_hdmi.c:2 > drivers/gpu/drm/gma500/oaktrail_hdmi.c:1 > drivers/gpu/drm/gma500/oaktrail_lvds.c:2 > drivers/gpu/drm/gma500/psb_intel_modes.c:1 > drivers/gpu/drm/gma500/psb_intel_sdvo.c:2 > - should be updated at some point (as you pointed out). > > > drivers/gpu/drm/i915/display/intel_hdmi.c | 12 +- > drivers/gpu/drm/i915/intel_connector.c:1 > drivers/gpu/drm/i915/intel_crt.c:2 > - not too sure here > > drivers/gpu/drm/i915/intel_dp.c:2 > - not applicable: aux dp/mst > > drivers/gpu/drm/i915/intel_lvds.c:1 >
Re: [PATCH v6 00/24] Associate ddc adapters with connectors
Hi Andrzej, On Fri, Jul 26, 2019 at 07:22:54PM +0200, Andrzej Pietrasiewicz wrote: > It is difficult for a user to know which of the i2c adapters is for which > drm connector. This series addresses this problem. > > The idea is to have a symbolic link in connector's sysfs directory, e.g.: > > ls -l /sys/class/drm/card0-HDMI-A-1/ddc > lrwxrwxrwx 1 root root 0 Jun 24 10:42 /sys/class/drm/card0-HDMI-A-1/ddc \ > -> ../../../../soc/1388.i2c/i2c-2 > > The user then knows that their card0-HDMI-A-1 uses i2c-2 and can e.g. run > ddcutil: > > ddcutil -b 2 getvcp 0x10 > VCP code 0x10 (Brightness): current value =90, max value = 100 > > The first patch in the series adds struct i2c_adapter pointer to struct > drm_connector. If the field is used by a particular driver, then an > appropriate symbolic link is created by the generic code, which is also added > by this patch. > > Patch 2 adds a new variant of drm_connector_init(), see the changelog > below. > > Patches 3..24 are examples of how to convert a driver to this new scheme. > > v1..v2: > > - used fixed name "ddc" for the symbolic link in order to make it easy for > userspace to find the i2c adapter > > v2..v3: > > - converted as many drivers as possible. > > v3..v4: > > - added Reviewed-by for patch 01/23 > - moved "ddc" field assignment to before drm_connector_init() is called > in msm, vc4, sti, mgag200, ast, amdgpu, radeon > - simplified the code in amdgpu and radeon at the expense of some lines > exceeding 80 characters as per Alex Deucher's suggestion > - added i915 > > v4..v5: > > - changed "include " to "struct i2c_adapter;" > in drm_connector.h, consequently, added "include " > in drm_sysfs.c. > - added "drm_connector_init_with_ddc()" variant to ensure that the ddc > field of drm_connector is preserved accross its invocation > - accordingly changed invocations of drm_connector_init() in the > touched drivers to use the new variant > > v5..v6: > > - improved subject line of patch 1 > - added kernel-doc for drm_connector_init_with_ddc() > - improved kernel-doc for the ddc field of struct drm_connector > - added Reviewed-by in patches 17 and 18 > - added Acked-by in patch 2 > - made the ownership of ddc i2c_adapter explicit in all patches, > this made the affected patches much simpler > > @Benjamin > @Shawn > > There were your Acked-by or Reviewed-by for some patches in v4, but now > that the patches use the newly added function I'm not sure I can still > include those tags without you actually confirming. Can I? Or can you > please re-review? > > TODO: nouveau, gma500, omapdrm, panel-simple - if applicable. omapdrm is moving to a new helper that creates connectors for a set of bridges, so I'll handle it there. It may require adding a ddc field to drm_bridge. > Other drivers are either already converted or don't mention neither > "ddc" nor "i2c_adapter". > > Andrzej Pietrasiewicz (24): > drm: Add ddc link in sysfs created by drm_connector > drm: Add drm_connector_init() variant with ddc > drm/exynos: Provide ddc symlink in connector's sysfs > drm: rockchip: Provide ddc symlink in rk3066_hdmi sysfs directory > drm: rockchip: Provide ddc symlink in inno_hdmi sysfs directory > drm/msm/hdmi: Provide ddc symlink in hdmi connector sysfs directory > drm/sun4i: hdmi: Provide ddc symlink in sun4i hdmi connector sysfs > directory > drm/mediatek: Provide ddc symlink in hdmi connector sysfs directory > drm/tegra: Provide ddc symlink in output connector sysfs directory > drm/imx: imx-ldb: Provide ddc symlink in connector's sysfs > drm/imx: imx-tve: Provide ddc symlink in connector's sysfs > drm/vc4: Provide ddc symlink in connector sysfs directory > drm: zte: Provide ddc symlink in hdmi connector sysfs directory > drm: zte: Provide ddc symlink in vga connector sysfs directory > drm/tilcdc: Provide ddc symlink in connector sysfs directory > drm: sti: Provide ddc symlink in hdmi connector sysfs directory > drm/mgag200: Provide ddc symlink in connector sysfs directory > drm/ast: Provide ddc symlink in connector sysfs directory > drm/bridge: dumb-vga-dac: Provide ddc symlink in connector sysfs > directory > drm/bridge: dw-hdmi: Provide ddc symlink in connector sysfs directory > drm/bridge: ti-tfp410: Provide ddc symlink in connector sysfs > directory > drm/amdgpu: Provide ddc symlink in connector sysfs directory > drm/radeon: Provide ddc symlink in connector sysfs directory > drm/i915: Provide ddc symlink in hdmi connector sysfs directory > > .../gpu/drm/amd/amdgpu/amdgpu_connectors.c| 96 > drivers/gpu/drm/ast/ast_mode.c| 13 +- > drivers/gpu/drm/bridge/dumb-vga-dac.c | 6 +- > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 6 +- > drivers/gpu/drm/bridge/ti-tfp410.c| 6 +- > drivers/gpu/drm/drm_connector.c | 35 + > drivers/gpu/drm/drm_sysfs.c | 8 + >
Re: [PATCH v6 00/24] Associate ddc adapters with connectors
Hi Andezej. On Fri, Jul 26, 2019 at 07:22:54PM +0200, Andrzej Pietrasiewicz wrote: > It is difficult for a user to know which of the i2c adapters is for which > drm connector. This series addresses this problem. > > The idea is to have a symbolic link in connector's sysfs directory, e.g.: > > ls -l /sys/class/drm/card0-HDMI-A-1/ddc > lrwxrwxrwx 1 root root 0 Jun 24 10:42 /sys/class/drm/card0-HDMI-A-1/ddc \ > -> ../../../../soc/1388.i2c/i2c-2 > > The user then knows that their card0-HDMI-A-1 uses i2c-2 and can e.g. run > ddcutil: > > ddcutil -b 2 getvcp 0x10 > VCP code 0x10 (Brightness): current value =90, max value = 100 > > The first patch in the series adds struct i2c_adapter pointer to struct > drm_connector. If the field is used by a particular driver, then an > appropriate symbolic link is created by the generic code, which is also added > by this patch. > > Patch 2 adds a new variant of drm_connector_init(), see the changelog > below. > > Patches 3..24 are examples of how to convert a driver to this new scheme. > ... > > v5..v6: > > - improved subject line of patch 1 > - added kernel-doc for drm_connector_init_with_ddc() > - improved kernel-doc for the ddc field of struct drm_connector > - added Reviewed-by in patches 17 and 18 > - added Acked-by in patch 2 > - made the ownership of ddc i2c_adapter explicit in all patches, > this made the affected patches much simpler Looks good now. Patch 1 and 2 are: Reviewed-by: Sam Ravnborg The remaining patches are: Acked-by: Sam Ravnborg Sam ___ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx
