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Hartmann" , Michael Turquette , Peng Fan , Pengutronix Kernel Team , Sascha Hauer , Shawn Guo , Stephen Boyd , imx@lists.linux.dev, kernel@dh-electronics.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] clk: imx: clk-imx8mp: Allow media_disp pixel clock reconfigure parent rate Message-ID: References: <20240531202648.277078-1-marex@denx.de> Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240531202648.277078-1-marex@denx.de> On 24-05-31 22:26:26, Marek Vasut wrote: > The media_disp[12]_pix clock supply LCDIFv3 pixel clock output. These > clocks are usually the only downstream clock from Video PLL on i.MX8MP. > Allow these clocks to reconfigure the Video PLL, as that results in > accurate pixel clock. If the Video PLL is not reconfigured, the pixel > clock accuracy is low. > > Signed-off-by: Marek Vasut Reviewed-by: Abel Vesa > --- > Cc: Abel Vesa > Cc: Fabio Estevam > Cc: Lukas F. Hartmann > Cc: Michael Turquette > Cc: Peng Fan > Cc: Pengutronix Kernel Team > Cc: Sascha Hauer > Cc: Shawn Guo > Cc: Stephen Boyd > Cc: imx@lists.linux.dev > Cc: kernel@dh-electronics.com > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-clk@vger.kernel.org > --- > drivers/clk/imx/clk-imx8mp.c | 4 ++-- > drivers/clk/imx/clk.h | 4 ++++ > 2 files changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c > index 670aa2bab3017..f11dfe2028319 100644 > --- a/drivers/clk/imx/clk-imx8mp.c > +++ b/drivers/clk/imx/clk-imx8mp.c > @@ -547,7 +547,7 @@ static int imx8mp_clocks_probe(struct platform_device *pdev) > hws[IMX8MP_CLK_AHB] = imx8m_clk_hw_composite_bus_critical("ahb_root", imx8mp_ahb_sels, ccm_base + 0x9000); > hws[IMX8MP_CLK_AUDIO_AHB] = imx8m_clk_hw_composite_bus("audio_ahb", imx8mp_audio_ahb_sels, ccm_base + 0x9100); > hws[IMX8MP_CLK_MIPI_DSI_ESC_RX] = imx8m_clk_hw_composite_bus("mipi_dsi_esc_rx", imx8mp_mipi_dsi_esc_rx_sels, ccm_base + 0x9200); > - hws[IMX8MP_CLK_MEDIA_DISP2_PIX] = imx8m_clk_hw_composite_bus("media_disp2_pix", imx8mp_media_disp_pix_sels, ccm_base + 0x9300); > + hws[IMX8MP_CLK_MEDIA_DISP2_PIX] = imx8m_clk_hw_composite_bus_flags("media_disp2_pix", imx8mp_media_disp_pix_sels, ccm_base + 0x9300, CLK_SET_RATE_PARENT); > > hws[IMX8MP_CLK_IPG_ROOT] = imx_clk_hw_divider2("ipg_root", "ahb_root", ccm_base + 0x9080, 0, 1); > > @@ -609,7 +609,7 @@ static int imx8mp_clocks_probe(struct platform_device *pdev) > hws[IMX8MP_CLK_USDHC3] = imx8m_clk_hw_composite("usdhc3", imx8mp_usdhc3_sels, ccm_base + 0xbc80); > hws[IMX8MP_CLK_MEDIA_CAM1_PIX] = imx8m_clk_hw_composite("media_cam1_pix", imx8mp_media_cam1_pix_sels, ccm_base + 0xbd00); > hws[IMX8MP_CLK_MEDIA_MIPI_PHY1_REF] = imx8m_clk_hw_composite("media_mipi_phy1_ref", imx8mp_media_mipi_phy1_ref_sels, ccm_base + 0xbd80); > - hws[IMX8MP_CLK_MEDIA_DISP1_PIX] = imx8m_clk_hw_composite("media_disp1_pix", imx8mp_media_disp_pix_sels, ccm_base + 0xbe00); > + hws[IMX8MP_CLK_MEDIA_DISP1_PIX] = imx8m_clk_hw_composite_bus_flags("media_disp1_pix", imx8mp_media_disp_pix_sels, ccm_base + 0xbe00, CLK_SET_RATE_PARENT); > hws[IMX8MP_CLK_MEDIA_CAM2_PIX] = imx8m_clk_hw_composite("media_cam2_pix", imx8mp_media_cam2_pix_sels, ccm_base + 0xbe80); > hws[IMX8MP_CLK_MEDIA_LDB] = imx8m_clk_hw_composite("media_ldb", imx8mp_media_ldb_sels, ccm_base + 0xbf00); > hws[IMX8MP_CLK_MEMREPAIR] = imx8m_clk_hw_composite_critical("mem_repair", imx8mp_memrepair_sels, ccm_base + 0xbf80); > diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h > index adb7ad649a0d2..aa5202f284f3d 100644 > --- a/drivers/clk/imx/clk.h > +++ b/drivers/clk/imx/clk.h > @@ -442,6 +442,10 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name, > _imx8m_clk_hw_composite(name, parent_names, reg, \ > IMX_COMPOSITE_BUS, IMX_COMPOSITE_CLK_FLAGS_DEFAULT) > > +#define imx8m_clk_hw_composite_bus_flags(name, parent_names, reg, flags) \ > + _imx8m_clk_hw_composite(name, parent_names, reg, \ > + IMX_COMPOSITE_BUS, IMX_COMPOSITE_CLK_FLAGS_DEFAULT | flags) > + > #define imx8m_clk_hw_composite_bus_critical(name, parent_names, reg) \ > _imx8m_clk_hw_composite(name, parent_names, reg, \ > IMX_COMPOSITE_BUS, IMX_COMPOSITE_CLK_FLAGS_CRITICAL) > -- > 2.43.0 >