diff options
| author | Stephen Boyd <swboyd@chromium.org> | 2023-08-29 11:47:26 -0700 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-10-09 12:17:46 +0300 |
| commit | 744077f94e431214c10a2802a189a26ed57dd264 (patch) | |
| tree | dd0e8e3dad579db951fb87479351406b46caba43 /drivers/gpu/drm/msm/dp | |
| parent | efcbd6f9cdeba0b3fff1c9ceab7ea1cf6e3c5ab4 (diff) | |
drm/msm/dp: Replace open-coded drm_dp_read_dpcd_caps()
This function duplicates the common function drm_dp_read_dpcd_caps().
The array of DPCD registers filled in is one size larger than the
function takes, but from what I can tell that extra byte was never used.
Resize the array and use the common function to reduce the code here.
Cc: Vinod Polimera <quic_vpolimer@quicinc.com>
Cc: Kuogee Hsieh <quic_khsieh@quicinc.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/554981/
Link: https://lore.kernel.org/r/20230829184735.2841739-2-swboyd@chromium.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/msm/dp')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_panel.c | 42 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_panel.h | 4 |
2 files changed, 6 insertions, 40 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 42d52510ffd4..09d4f6c38ef8 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -48,47 +48,15 @@ static int dp_panel_read_dpcd(struct dp_panel *dp_panel) ssize_t rlen; struct dp_panel_private *panel; struct dp_link_info *link_info; - u8 *dpcd, major = 0, minor = 0, temp; - u32 offset = DP_DPCD_REV; + u8 *dpcd, major, minor; + panel = container_of(dp_panel, struct dp_panel_private, dp_panel); dpcd = dp_panel->dpcd; + rc = drm_dp_read_dpcd_caps(panel->aux, dpcd); + if (rc) + return rc; - panel = container_of(dp_panel, struct dp_panel_private, dp_panel); link_info = &dp_panel->link_info; - - rlen = drm_dp_dpcd_read(panel->aux, offset, - dpcd, (DP_RECEIVER_CAP_SIZE + 1)); - if (rlen < (DP_RECEIVER_CAP_SIZE + 1)) { - DRM_ERROR("dpcd read failed, rlen=%zd\n", rlen); - if (rlen == -ETIMEDOUT) - rc = rlen; - else - rc = -EINVAL; - - goto end; - } - - temp = dpcd[DP_TRAINING_AUX_RD_INTERVAL]; - - /* check for EXTENDED_RECEIVER_CAPABILITY_FIELD_PRESENT */ - if (temp & BIT(7)) { - drm_dbg_dp(panel->drm_dev, - "using EXTENDED_RECEIVER_CAPABILITY_FIELD\n"); - offset = DPRX_EXTENDED_DPCD_FIELD; - } - - rlen = drm_dp_dpcd_read(panel->aux, offset, - dpcd, (DP_RECEIVER_CAP_SIZE + 1)); - if (rlen < (DP_RECEIVER_CAP_SIZE + 1)) { - DRM_ERROR("dpcd read failed, rlen=%zd\n", rlen); - if (rlen == -ETIMEDOUT) - rc = rlen; - else - rc = -EINVAL; - - goto end; - } - link_info->revision = dpcd[DP_DPCD_REV]; major = (link_info->revision >> 4) & 0x0f; minor = link_info->revision & 0x0f; diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h index ed1030e17e1b..6d733480a62d 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.h +++ b/drivers/gpu/drm/msm/dp/dp_panel.h @@ -13,8 +13,6 @@ struct edid; -#define DPRX_EXTENDED_DPCD_FIELD 0x2200 - #define DP_DOWNSTREAM_PORTS 4 #define DP_DOWNSTREAM_CAP_SIZE 4 @@ -40,7 +38,7 @@ struct dp_panel_psr { struct dp_panel { /* dpcd raw data */ - u8 dpcd[DP_RECEIVER_CAP_SIZE + 1]; + u8 dpcd[DP_RECEIVER_CAP_SIZE]; u8 ds_cap_info[DP_DOWNSTREAM_PORTS * DP_DOWNSTREAM_CAP_SIZE]; u32 ds_port_cnt; u32 dfp_present; |