[PATCH 1/2] drm/amd/display: Switch the custom "max bpc" property to the DRM prop
Kazlauskas, Nicholas
Nicholas.Kazlauskas at amd.com
Wed May 22 15:51:58 UTC 2019
On 5/22/19 11:11 AM, Nicholas Kazlauskas wrote:
> [CAUTION: External Email]
>
> [Why]
> The custom "max bpc" property was added to limit color depth while the
> DRM one was still being merged. It's been a few kernel versions since
> then and this TODO was still sticking around.
>
> [How]
> Attach the DRM max bpc property to the connector and drop all of our
> custom property management. Set the max bpc to 8 by default since
> DRM defaults to the max in the range which would be 16 in this case.
>
> No behavioral changes are intended with this patch, it should just be
> a refactor.
>
> Cc: Leo Li <sunpeng.li at amd.com>
> Cc: Harry Wentland <harry.wentland at amd.com>
> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 4 ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 2 --
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 31 ++++++++-----------
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 1 -
> 4 files changed, 13 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> index 4e944737b708..767ee6991ef4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
> @@ -631,10 +631,6 @@ int amdgpu_display_modeset_create_props(struct amdgpu_device *adev)
> amdgpu_dither_enum_list, sz);
>
> if (amdgpu_device_has_dc_support(adev)) {
> - adev->mode_info.max_bpc_property =
> - drm_property_create_range(adev->ddev, 0, "max bpc", 8, 16);
> - if (!adev->mode_info.max_bpc_property)
> - return -ENOMEM;
> adev->mode_info.abm_level_property =
> drm_property_create_range(adev->ddev, 0,
> "abm level", 0, 4);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> index c7940af42f76..8bda00ce8816 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
> @@ -332,8 +332,6 @@ struct amdgpu_mode_info {
> struct drm_property *audio_property;
> /* FMT dithering */
> struct drm_property *dither_property;
> - /* maximum number of bits per channel for monitor color */
> - struct drm_property *max_bpc_property;
> /* Adaptive Backlight Modulation (power feature) */
> struct drm_property *abm_level_property;
> /* it is used to allow enablement of freesync mode */
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 4a1755bce96c..a7a9e4d81a17 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -3040,14 +3040,14 @@ static void update_stream_scaling_settings(const struct drm_display_mode *mode,
> static enum dc_color_depth
> convert_color_depth_from_display_info(const struct drm_connector *connector)
> {
> - struct dm_connector_state *dm_conn_state =
> - to_dm_connector_state(connector->state);
> - uint32_t bpc = connector->display_info.bpc;
> + uint32_t bpc = 8;
Actually, there is a behavioral state change here. This should still be:
bpc = connector->display_info.bpc;
I'll fix up this and drop that extra TODO left over in patch 2 and post
a v2.
Nicholas Kazlauskas
>
> - /* TODO: Remove this when there's support for max_bpc in drm */
> - if (dm_conn_state && bpc > dm_conn_state->max_bpc)
> - /* Round down to nearest even number. */
> - bpc = dm_conn_state->max_bpc - (dm_conn_state->max_bpc & 1);
> + /* TODO: Use passed in state instead of the current state. */
> + if (connector->state) {
> + bpc = connector->state->max_bpc;
> + /* Round down to the nearest even number. */
> + bpc = bpc - (bpc & 1);
> + }
>
> switch (bpc) {
> case 0:
> @@ -3689,9 +3689,6 @@ int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
> } else if (property == adev->mode_info.underscan_property) {
> dm_new_state->underscan_enable = val;
> ret = 0;
> - } else if (property == adev->mode_info.max_bpc_property) {
> - dm_new_state->max_bpc = val;
> - ret = 0;
> } else if (property == adev->mode_info.abm_level_property) {
> dm_new_state->abm_level = val;
> ret = 0;
> @@ -3743,9 +3740,6 @@ int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
> } else if (property == adev->mode_info.underscan_property) {
> *val = dm_state->underscan_enable;
> ret = 0;
> - } else if (property == adev->mode_info.max_bpc_property) {
> - *val = dm_state->max_bpc;
> - ret = 0;
> } else if (property == adev->mode_info.abm_level_property) {
> *val = dm_state->abm_level;
> ret = 0;
> @@ -3808,7 +3802,6 @@ void amdgpu_dm_connector_funcs_reset(struct drm_connector *connector)
> state->underscan_enable = false;
> state->underscan_hborder = 0;
> state->underscan_vborder = 0;
> - state->max_bpc = 8;
>
> __drm_atomic_helper_connector_reset(connector, &state->base);
> }
> @@ -3835,7 +3828,6 @@ amdgpu_dm_connector_atomic_duplicate_state(struct drm_connector *connector)
> new_state->underscan_enable = state->underscan_enable;
> new_state->underscan_hborder = state->underscan_hborder;
> new_state->underscan_vborder = state->underscan_vborder;
> - new_state->max_bpc = state->max_bpc;
>
> return &new_state->base;
> }
> @@ -4756,9 +4748,12 @@ void amdgpu_dm_connector_init_helper(struct amdgpu_display_manager *dm,
> drm_object_attach_property(&aconnector->base.base,
> adev->mode_info.underscan_vborder_property,
> 0);
> - drm_object_attach_property(&aconnector->base.base,
> - adev->mode_info.max_bpc_property,
> - 0);
> +
> + drm_connector_attach_max_bpc_property(&aconnector->base, 8, 16);
> +
> + /* This defaults to the max in the range, but we want 8bpc. */
> + aconnector->base.state->max_bpc = 8;
> + aconnector->base.state->max_requested_bpc = 8;
>
> if (connector_type == DRM_MODE_CONNECTOR_eDP &&
> dc_is_dmcu_initialized(adev->dm.dc)) {
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> index 2cbc26f5d6a6..3395f2e4d564 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
> @@ -304,7 +304,6 @@ struct dm_connector_state {
> enum amdgpu_rmx_type scaling;
> uint8_t underscan_vborder;
> uint8_t underscan_hborder;
> - uint8_t max_bpc;
> bool underscan_enable;
> bool freesync_enable;
> bool freesync_capable;
> --
> 2.17.1
>
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