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Message-ID: <rjhv2modyvb2py4z6ve7i3xqu6ezrz7op7r6ygldbhydbvrtha@32bkl37jwol3>
Date: Fri, 6 Dec 2024 11:01:48 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>, Stephen Boyd <swboyd@...omium.org>,
Chandan Uddaraju <chandanu@...eaurora.org>, Guenter Roeck <groeck@...omium.org>,
Kuogee Hsieh <quic_khsieh@...cinc.com>, Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
Vara Reddy <quic_varar@...cinc.com>, Rob Clark <robdclark@...omium.org>,
Tanmay Shah <tanmay@...eaurora.org>, linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
Jessica Zhang <quic_jesszhan@...cinc.com>, Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 06/45] drm/msm/dp: remove dp_display's dp_mode and use
dp_panel's instead
On Thu, Dec 05, 2024 at 08:31:37PM -0800, Abhinav Kumar wrote:
> dp_display caches the current display mode and then passes it onto
> the panel to be used for programming the panel params. Remove this
> two level passing and directly populated the panel's dp_display_mode
> instead.
Remove both and use the one from crtc_state?
>
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
> drivers/gpu/drm/msm/dp/dp_display.c | 46 ++++++++++++++++---------------------
> 1 file changed, 20 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 052db80c6a365f53c2c0a37d3b69ea2b627aea1f..4bd85ae754429333aa423c985368344cd03c7752 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -90,7 +90,6 @@ struct msm_dp_display_private {
> struct msm_dp_panel *panel;
> struct msm_dp_ctrl *ctrl;
>
> - struct msm_dp_display_mode msm_dp_mode;
> struct msm_dp msm_dp_display;
>
> /* wait for audio signaling */
> @@ -1436,10 +1435,13 @@ bool msm_dp_needs_periph_flush(const struct msm_dp *msm_dp_display,
> bool msm_dp_wide_bus_available(const struct msm_dp *msm_dp_display)
> {
> struct msm_dp_display_private *dp;
> + struct msm_dp_panel *dp_panel;
>
> dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display);
>
> - if (dp->msm_dp_mode.out_fmt_is_yuv_420)
> + dp_panel = dp->panel;
> +
> + if (dp_panel->msm_dp_mode.out_fmt_is_yuv_420)
> return false;
>
> return dp->wide_bus_supported;
> @@ -1501,10 +1503,6 @@ void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
> bool force_link_train = false;
>
> msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
> - if (!msm_dp_display->msm_dp_mode.drm_mode.clock) {
> - DRM_ERROR("invalid params\n");
> - return;
> - }
>
> if (dp->is_edp)
> msm_dp_hpd_plug_handle(msm_dp_display, 0);
> @@ -1516,13 +1514,6 @@ void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
> return;
> }
>
> - rc = msm_dp_display_set_mode(dp, &msm_dp_display->msm_dp_mode);
> - if (rc) {
> - DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
> - mutex_unlock(&msm_dp_display->event_mutex);
> - return;
> - }
> -
> state = msm_dp_display->hpd_state;
>
> if (state == ST_CONNECTED && !dp->power_on) {
> @@ -1599,37 +1590,40 @@ void msm_dp_bridge_mode_set(struct drm_bridge *drm_bridge,
> struct msm_dp *dp = msm_dp_bridge->msm_dp_display;
> struct msm_dp_display_private *msm_dp_display;
> struct msm_dp_panel *msm_dp_panel;
> + struct msm_dp_display_mode msm_dp_mode;
No need to allocate it on stack just to copy it later on. Please write
the data directly to a proper location from the beginning.
>
> msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display);
> msm_dp_panel = msm_dp_display->panel;
>
> - memset(&msm_dp_display->msm_dp_mode, 0x0, sizeof(struct msm_dp_display_mode));
> + memset(&msm_dp_mode, 0x0, sizeof(struct msm_dp_display_mode));
>
> if (msm_dp_display_check_video_test(dp))
> - msm_dp_display->msm_dp_mode.bpp = msm_dp_display_get_test_bpp(dp);
> + msm_dp_mode.bpp = msm_dp_display_get_test_bpp(dp);
> else /* Default num_components per pixel = 3 */
> - msm_dp_display->msm_dp_mode.bpp = dp->connector->display_info.bpc * 3;
> + msm_dp_mode.bpp = dp->connector->display_info.bpc * 3;
>
> - if (!msm_dp_display->msm_dp_mode.bpp)
> - msm_dp_display->msm_dp_mode.bpp = 24; /* Default bpp */
> + if (!msm_dp_mode.bpp)
> + msm_dp_mode.bpp = 24; /* Default bpp */
The msm_dp_mode.bpp gets rewritten by msm_dp_panel_init_panel_info()
after being set here. Is this code part redundant?
>
> - drm_mode_copy(&msm_dp_display->msm_dp_mode.drm_mode, adjusted_mode);
> + drm_mode_copy(&msm_dp_mode.drm_mode, adjusted_mode);
>
> - msm_dp_display->msm_dp_mode.v_active_low =
> - !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
> + msm_dp_mode.v_active_low =
> + !!(msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
>
> - msm_dp_display->msm_dp_mode.h_active_low =
> - !!(msm_dp_display->msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
> + msm_dp_mode.h_active_low =
> + !!(msm_dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
>
> - msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 =
> + msm_dp_mode.out_fmt_is_yuv_420 =
> drm_mode_is_420_only(&dp->connector->display_info, adjusted_mode) &&
> msm_dp_panel->vsc_sdp_supported;
>
> + msm_dp_display_set_mode(dp, &msm_dp_mode);
> +
> /* populate wide_bus_support to different layers */
> msm_dp_display->ctrl->wide_bus_en =
> - msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
> + msm_dp_panel->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
> msm_dp_display->catalog->wide_bus_en =
> - msm_dp_display->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
> + msm_dp_panel->msm_dp_mode.out_fmt_is_yuv_420 ? false : msm_dp_display->wide_bus_supported;
> }
>
> void msm_dp_bridge_hpd_enable(struct drm_bridge *bridge)
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
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