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([2a01:e0a:3d9:2080:3030:f63e:fedd:700f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-458b73868a4sm99448145e9.11.2025.08.04.08.16.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 Aug 2025 08:16:18 -0700 (PDT) Message-ID: Date: Mon, 4 Aug 2025 17:16:18 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: neil.armstrong@linaro.org Reply-To: Neil Armstrong Subject: Re: [PATCH 03/13] drm/panel: ilitek-ili9881c: convert (un-)prepare to mipi_dsi_multi_context To: Heiko Stuebner Cc: quic_jesszhan@quicinc.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, hjc@rock-chips.com, andy.yan@rock-chips.com, andyshrk@163.com, nicolas.frattaroli@collabora.com, dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org References: <20250707164906.1445288-1-heiko@sntech.de> <20250707164906.1445288-4-heiko@sntech.de> Content-Language: en-US, fr Autocrypt: addr=neil.armstrong@linaro.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 07/07/2025 18:48, Heiko Stuebner wrote: > This saves some lines for error handling. > > For the address mode change, that value is always an u8, so switching > to dcs_write_buffer function should be appropriate. > > Signed-off-by: Heiko Stuebner > --- > drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 66 ++++++------------- > 1 file changed, 21 insertions(+), 45 deletions(-) > > diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c > index a20b52181ea0..154eea5f4d77 100644 > --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c > +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c > @@ -1239,33 +1239,24 @@ static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel) > * So before any attempt at sending a command or data, we have to be > * sure if we're in the right page or not. > */ > -static int ili9881c_switch_page(struct ili9881c *ctx, u8 page) > +static void ili9881c_switch_page(struct mipi_dsi_multi_context *mctx, u8 page) > { > u8 buf[4] = { 0xff, 0x98, 0x81, page }; > - int ret; > - > - ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf)); > - if (ret < 0) > - return ret; > > - return 0; > + mipi_dsi_dcs_write_buffer_multi(mctx, buf, sizeof(buf)); > } > > -static int ili9881c_send_cmd_data(struct ili9881c *ctx, u8 cmd, u8 data) > +static void ili9881c_send_cmd_data(struct mipi_dsi_multi_context *mctx, u8 cmd, u8 data) > { > u8 buf[2] = { cmd, data }; > - int ret; > > - ret = mipi_dsi_dcs_write_buffer(ctx->dsi, buf, sizeof(buf)); > - if (ret < 0) > - return ret; > - > - return 0; > + mipi_dsi_dcs_write_buffer_multi(mctx, buf, sizeof(buf)); > } > > static int ili9881c_prepare(struct drm_panel *panel) > { > struct ili9881c *ctx = panel_to_ili9881c(panel); > + struct mipi_dsi_multi_context mctx = { .dsi = ctx->dsi }; > unsigned int i; > int ret; > > @@ -1286,54 +1277,39 @@ static int ili9881c_prepare(struct drm_panel *panel) > const struct ili9881c_instr *instr = &ctx->desc->init[i]; > > if (instr->op == ILI9881C_SWITCH_PAGE) > - ret = ili9881c_switch_page(ctx, instr->arg.page); > + ili9881c_switch_page(&mctx, instr->arg.page); > else if (instr->op == ILI9881C_COMMAND) > - ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd, > - instr->arg.cmd.data); > - > - if (ret) > - goto disable_power; > - } > - > - ret = ili9881c_switch_page(ctx, 0); > - if (ret) > - return ret; > - > - if (ctx->address_mode) { > - ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_ADDRESS_MODE, > - &ctx->address_mode, > - sizeof(ctx->address_mode)); > - if (ret < 0) > - goto disable_power; > + ili9881c_send_cmd_data(&mctx, instr->arg.cmd.cmd, > + instr->arg.cmd.data); > } > > - ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); > - if (ret) > - goto disable_power; > - > - ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); > - if (ret) > - goto disable_power; > + ili9881c_switch_page(&mctx, 0); > > - msleep(120); > + if (ctx->address_mode) > + ili9881c_send_cmd_data(&mctx, MIPI_DCS_SET_ADDRESS_MODE, > + ctx->address_mode); > > - ret = mipi_dsi_dcs_set_display_on(ctx->dsi); > - if (ret) > + mipi_dsi_dcs_set_tear_on_multi(&mctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK); > + mipi_dsi_dcs_exit_sleep_mode_multi(&mctx); > + mipi_dsi_msleep(&mctx, 120); > + mipi_dsi_dcs_set_display_on_multi(&mctx); > + if (mctx.accum_err) > goto disable_power; > > return 0; > > disable_power: > regulator_disable(ctx->power); > - return ret; > + return mctx.accum_err; > } > > static int ili9881c_unprepare(struct drm_panel *panel) > { > struct ili9881c *ctx = panel_to_ili9881c(panel); > + struct mipi_dsi_multi_context mctx = { .dsi = ctx->dsi }; > > - mipi_dsi_dcs_set_display_off(ctx->dsi); > - mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); > + mipi_dsi_dcs_set_display_off_multi(&mctx); > + mipi_dsi_dcs_enter_sleep_mode_multi(&mctx); > regulator_disable(ctx->power); > gpiod_set_value_cansleep(ctx->reset, 1); > Reviewed-by: Neil Armstrong