On 6/27/2022 9:54 AM, Dmitry Baryshkov wrote:
If for some reason the msm_dp_config::descs array starts from non-zero index or contains the hole, setting the msm_dp_config::num_descs might be not that obvious and error-prone. Use ARRAY_SIZE to set this field rather than encoding the value manually. Reported-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> --- drivers/gpu/drm/msm/dp/dp_display.c | 46 +++++++++++++++++------------ 1 file changed, 27 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index f87fa3ba1e25..6fed738a9467 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -131,35 +131,43 @@ struct msm_dp_config { size_t num_descs; };+static const struct msm_dp_desc sc7180_dp_descs[] = {+ [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, +}; + static const struct msm_dp_config sc7180_dp_cfg = { - .descs = (const struct msm_dp_desc[]) { - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, - }, - .num_descs = 1, + .descs = sc7180_dp_descs, + .num_descs = ARRAY_SIZE(sc7180_dp_descs), +}; +
why you want to do that? It is very clear only one entry, why you want to make it 2 entry here? can you just embedded MSM_DP_COTROLLER_x into struct msm_dp_config?
+static const struct msm_dp_desc sc7280_dp_descs[] = { + [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true }, + [MSM_DP_CONTROLLER_1] = { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true }, };static const struct msm_dp_config sc7280_dp_cfg = {- .descs = (const struct msm_dp_desc[]) { - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true }, - [MSM_DP_CONTROLLER_1] = { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true }, - }, - .num_descs = 2, + .descs = sc7280_dp_descs, + .num_descs = ARRAY_SIZE(sc7280_dp_descs), +}; + +static const struct msm_dp_desc sc8180x_dp_descs[] = { + [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, + [MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, + [MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP }, };static const struct msm_dp_config sc8180x_dp_cfg = {- .descs = (const struct msm_dp_desc[]) { - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, - [MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, - [MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP }, - }, - .num_descs = 3, + .descs = sc8180x_dp_descs, + .num_descs = ARRAY_SIZE(sc8180x_dp_descs), +}; + +static const struct msm_dp_desc sm8350_dp_descs[] = { + [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, };static const struct msm_dp_config sm8350_dp_cfg = {- .descs = (const struct msm_dp_desc[]) { - [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort }, - }, - .num_descs = 1, + .descs = sm8350_dp_descs, + .num_descs = ARRAY_SIZE(sm8350_dp_descs), };static const struct of_device_id dp_dt_match[] = {
